1) He has both potential and kinetic energy
2) Before the parachute opens, the potential energy decreases and the kinetic energy increases
Explanation:
1)
The gravitational potential energy of a body is the energy possessed by the object due to its position in a gravitational field, and it is given by:
[tex]PE=mgh[/tex]
where
m is the mass of the body
g is the acceleration of gravity
h is the height of the body above the ground
On the other hand, the kinetic energy of a body is the energy possessed by the body due to its motion; it is given by
[tex]KE=\frac{1}{2}mv^2[/tex]
where
v is the speed of the object
Here Mr. Leppold has both potential and kinetic energy before opening the parachute, because:
- It is moving at a certain speed, so [tex]v\neq 0[/tex], therefore he has kinetic energy
- He is at a certain height above the ground, [tex]h\neq 0[/tex], therefore he has potential energy
2)
The total mechanical energy of Mr.Leppold is the sum of the potential and the kinetic energy:
[tex]E=PE+KE[/tex]
According to the law of conservation of energy, in absence of air resistance, this quantity remains constant.
During the fall, the height of Leppold decreases: this means that as [tex]h[/tex] decreases, the potential energy decreases too.
However, the total energy E must remain constant: therefore, this means that the kinetic energy KE must increase, and this occurs because the speed of Mr. Leppold increases as he falls.
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Use the drop-down menus to identify the type of energy each phrase describes.
The shortest wavelength of visible light = D
Energy that can be felt as heat but not seen = B
Short, invisible rays that can cause eye damage = C
Visible light with the longest wavelength = A
ANSWERS HERE
The shortest wavelength of visible light = violet light
Energy that can be felt as heat but not seen = infrared
Short, invisible rays that can cause eye damage = ultraviolet
Visible light with the longest wavelength = red light
Explanation:
Electromagnetic waves are waves consisting of oscillations of the electric and the magnetic field, occurring in a plane perpendicular to the direction of motion the wave.
They are the only type of waves able to travel without a medium, and they are transverse in nature.
All electromagnetic waves travel in a vacuum at the speed of light, which value is:
[tex]c=3.0\cdot 10^8 m/s[/tex]
Electromagnetic waves are classified into 7 different classes, depending on their wavelength/frequency, and they have different properties. From shortest to longest wavelength (and from highest to lowest frequency), they are:
Gamma rays
X rays
Ultraviolet
Visible light
Infrared radiation
Microwaves
Radio waves
Moreover, the visible light of the spectrum is further divided into different colors, according to how our eye perceive them; from shortest to longest wavelength:
violet
blue
green
yellow
orange
red
Therefore, we have:
The shortest wavelength of visible light is violet light, which has wavelength between 380 and 450 nmThe longest wavelength of visible light is red light, which has wavelenght between 620 and 750 nmInfrared radiation is a type of radiation that is felt as heat by our body, however it cannot be seen because it falls outside the spectrum of visible lightUltraviolet radiation is also invisible to human eye; it has shorter wavelength than visible light and therefore it has more frequency (and more energy), therefore it can cause damage, especially to the eyeLearn more about electromagnetic waves:
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The types of energy described are associated with specific wavelengths and frequencies in the electromagnetic spectrum, where violet is the shortest visible wavelength, infrared is felt as heat, ultraviolet rays can cause eye damage, and red has the longest visible wavelength.
Explanation:The question pertains to the electromagnetic spectrum and types of energy associated with different wavelengths and frequencies of light.
The shortest wavelength of visible light is violet, hence D = Violet.Energy that can be felt as heat but not seen is infrared, so B = Infrared.Short, invisible rays that can cause eye damage refer to ultraviolet rays, therefore C = Ultraviolet.Visible light with the longest wavelength is red, thus A = Red.These energy types represent various parts of the electromagnetic spectrum, with red light having the longest wavelength and least energy, and violet having the shortest wavelength and most energy. Infrared is typically experienced as heat, while ultraviolet rays, shorter still than violet, carry enough energy to potentially cause harm to biological tissues, like eye damage.
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Need an explanation please. Brainliest will be awarded.
We're adding two vectors here. The first is 300 Newtons to the right, which we can write as (300, 0), meaning 300 to the right, 0 up.
The second is 300 at let's say a 45 degree angle down. For the components we have an isosceles right triangle with hypotenuse 300, so the components are both magnitude 300/√2 = 150√2. So we can write this vector (150√2, -150√2), the negative sign because it points down in the y direction.
Adding is componentwise. The resulting force is (300+150√2, -150√2).
That has square magnitude
r² = (300+150√2)² + (-150√2)² = 150² ( (2+√2)² + (√2)² )
= 150²( (6 + 4√2) + 2)
= 300²(2+√2)
so
r = 300 √(2+√2) Newtons
That's the answer; I'm not sure if your class expects a calculator approximation, which is 554.3 Newtons.
What are examples of a solution in solids, liquids, and gases
Answer:
Solid: metal alloy
Liquid: beer
Gas: Air
Explanation:
A solution is a type of mixture where the solvent and solute are homogeneously mixed. Homogeneous mixture means that the solute shouldn't be able to be seen with the naked eye, filtered and stable enough.
Metal alloy will be an example of a solution in solid-state. Beer is a solution made of liquid alcohol and liquid water. Air mostly composed of nitrogen, but it has oxygen, carbon dioxide, and many other substances in gaseous form.
For two objects with masses 100 kg and 500 kg to be 20 meters apart , find the gravity between them
Answer:
8,3375*10^-9 N
Explanation:
For two objects with masses of 100 kg and 500 kg to be 20 meters apart, the gravity between them would be 8.3375×10⁻⁹ Newtons.
What is gravitational force?The gravitational force is an unobservable force that draws things together. You remain on the ground thanks to Earth's gravity, a gravitational force is a force that also causes objects to fall.
F = G× m₁* m₂ / r ²
G is the gravitational constant which has a value of 6.67 ×10⁻¹¹.
As given in the problem, we have to find out the gravitational force between two objects with masses of 100 kg and 500 kg to be 20 meters apart,
F= 6.67×10⁻¹¹(100×500)/20²
F=8.3375×10⁻⁹ Newtons
Thus, the gravity between them would be 8.3375×10⁻⁹ Newtons.
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Can someone PLEASEEE help me?
Air is a substance which has the lowest density of about 1.225 kg / m^3.
Explanation:
The mass of a substance per volume describes the density. Larger molecules have more density and more mass. Hence the sound is transmitted slowly. Sound waves are made up of kinetic energy and for the vibration of large molecules, more energy is needed. In general, sound travels faster in liquids than in gases because density is inversely proportional to the speed of sound and the density of air is low.The speed of sound varies with temperature because a change in temperature affects material density. In the air, an increase in temperature increases the speed of sound.A police car is traveling at a speed of 50 meters per second when it suddenly accelerates at a rate of 5 m/s2. How fast will the car be going (final velocity) if it maintains that acceleration for 30 seconds
Using the equation v = u + at, the final velocity of the police car after maintaining an acceleration of 5 m/s^2 for 30 seconds is found to be 200 meters per second.
Explanation:To determine the final velocity of a police car that accelerates from a given speed, we can use the formula for final velocity, which is derived from the equations of motion under constant acceleration. The formula we will use is v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.
In this case, the initial velocity u is 50 meters per second, the acceleration a is 5 m/s2, and the time t is 30 seconds. Plugging these values into the formula:
v = 50 m/s + (5 m/s2 × 30 s)
Calculating this, we get:
v = 50 m/s + 150 m/s = 200 m/s
Therefore, the final velocity of the police car after maintaining the acceleration for 30 seconds will be 200 meters per second.
a 7.0kg bowling ball traveling at 2.0 m/s collides with a stationary 0.5 kg beach ball in an elastic collision. The bowling ball leaves the collision with a velocity of 1.5 m/s traveling in the same direction as the beach ball.
calculate the speed of the beach ball
Answer: The speed of the beach ball would be 2.0 m/s
Explanation:
Answer:
2.0 m/s
Explanation:
If you drop a 5kg rock down a 20 m well, how fast will it be traveling when it hits the ground
The final speed of the rock is 19.8 m/s
Explanation:
We can solve this problem by using the law of conservation of energy: the total mechanical energy of the rock (the sum of potential energy + kinetic energy) must be conserved during the fall. Therefore we can write:
[tex]U_i +K_i = U_f + K_f[/tex]
where :
[tex]U_i[/tex] is the initial potential energy, at the top
[tex]K_i[/tex] is the initial kinetic energy, at the top
[tex]U_f[/tex] is the final potential energy, at the bottom
[tex]K_f[/tex] is the final kinetic energy, at the bottom
We can rewrite the equation as:
[tex]mgh_i + \frac{1}{2}mu^2 = mgh_f + \frac{1}{2}mv^2[/tex]
where:
m = 5 kg is the mass of the rock
[tex]g=9.8 m/s^2[/tex] is the acceleration of gravity
[tex]h_i = 20 m[/tex] is the initial height of the rock
u = 0 is the initial speed
[tex]h_f = 0[/tex] since the rock falls to the ground
v is the final speed
And solving for v, we find the final speed:
[tex]v=\sqrt{2gh_i}=\sqrt{2(9.8)(20)}=19.8 m/s[/tex]
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The distance versus time graph for Object A and Object B are shown.
A graph titles Distance vs Time. A straight slanting line is drawn through point 7 on the y-axis and this line is labeled Object A. The graph for Object B is a straight slanting line passing through the origin
What is the similarity between Object A and Object B?
Both have the same slope.
Both move with variable speed.
Both move with constant speed.
Both start the journey from the same point.
Answer:
Answer: Both move with constant speed.
Explanation:
Constant Speed Motion
When an object moves in such a way that it travels the same distances at the same times, we can say its speed is constant. For example, if it travels x=10 m in t=2 seconds and later it travels x=20 m in t=4 seconds, its speed is constant and equal to v=5 m/s. The relation between the variables x,t, and v is
x=v.t
Note that the relation between x and t is v, a constant value, thus the graph x-t is a line.
The question describes two graphs, for Object A and Object B respectively, and both of the descriptions correspond to lines. We don't have much information about the characteristics of the lines, but we can be sure, according to the definitions stated above, that both objects are traveling at a constant speed.
Answer: Both move with constant speed.
Answer:
C
Explanation:
Yes it is C
True or False?
The long term dangers of a volcanic eruption are the ash that remains in the
atmosphere for years after the eruption which block the solar energy causing a
increase in global temperatures.
The correct answer is; False.
Further Explanation:
Ash does not remain in the atmosphere for years after an eruption. It only takes a few days or at the most a few weeks for all of the ash to leave the atmosphere. It has little impact on the climate or global temperatures.
When a volcano erupts there are three things that the volcano puts out, they are;
AshLavaSulfur dioxide (SO2)The one thing that does have an effect on the global temperatures of an eruption is the volcanic aerosols. These aerosols, when released, reflect the solar radiation back to space.
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if two forces 3N and 20N acts on a body of mass 15kg, find the acceleration
A car with a mass of 1,000 kg moving with an initial velocity of 8 m/s is brought to rest by colliding with a truck. The collisions takes place over a time span of 0.2 s.Calculate the force exerted on the car
Answer:
-40,000 N
Explanation:
First, use the kinematics equation v(f) = v(i) + at. Final velocity is 0, initial is 8, and time is 0.2 seconds. Solving for a, you get -40 m/s^2. Then, use Newton’s second law, F=ma, to find the force. F = (1000)(-40) = -40,000 N.
Final answer:
The force exerted on a car with a mass of 1,000 kg, which is brought to rest from an initial velocity of 8 m/s over a time span of 0.2 s, is calculated to be 40,000 N in the direction opposite to the car's initial motion.
Explanation:
To calculate the force exerted on a 1,000 kg car that is brought to rest from an initial velocity of 8 m/s over a time span of 0.2 s, we can apply the concept of impulse and momentum. The impulse exerted on the car can be found using the formula:
Impulse = Change in Momentum = Force × Time
The change in momentum is equal to the final momentum minus the initial momentum. Since the car is brought to rest, its final momentum is 0, and the initial momentum is the product of the mass and the initial velocity. Therefore, we have:
Change in Momentum = 0 - (Mass × Initial Velocity)
Change in Momentum = 0 - (1,000 kg × 8 m/s)
Change in Momentum = -8,000 kg·m/s
The impulse exerted on the car is also the product of the force exerted and the time interval:
Force × Time = Change in Momentum
Force × 0.2 s = -8,000 kg·m/s
Force = -8,000 kg·m/s / 0.2 s
Force = -40,000 N
The negative sign indicates that the force is acting in the opposite direction of the car's initial motion. Therefore, the force exerted on the car is 40,000 N in the direction opposite to the car's initial motion.
BRAINLIST | Why are there some areas of the country where wind power is not the best option?
Answer:
In contrast, wind turbines produce no greenhouse gases when generating electricity. We should note that both noise and visual pollution are environmental disadvantages of wind turbines. However, these factors don't have a negative impact on the earth, water table or the quality of the air we breathe.
the millersburg ferry (m=13000.0 kg loaded) puts its engines in full reverse and stops in 65 seconds. if the speed before braking was 2.0 m/s, what was the braking force supplied by the propellers? solve using impulse and momentum.
The braking force is -400 N
Explanation:
We can solve this problem by using the impulse theorem, which states that the impulse applied on the ferry (the product of force and time) is equal to its change in momentum:
[tex]F \Delta t = m(v-u)[/tex]
where in this problem, we have:
F is the force applied by the brakes
[tex]\Delta t = 65 s[/tex] is the time interval
m = 13,000 kg is the mass of the ferry
u = 2.0 m/s is the initial velocity
v = 0 is the final velocity
And solving for F, we find the force applied by the brakes:
[tex]F=\frac{m(v-u)}{\Delta t}=\frac{(13000)(0-2.0)}{65}=-400 N[/tex]
where the negative sign indicates that the direction is backward.
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suppose you have two toy cars. Each has a mass of 0.04 kg . the cars have tape on their bumpers that will cost them to couple together. One car is stopped on the track. The other car, traveling at a velocity of 4 m/s, hits the first car. What is the momentum of the coupled cars? Answer ASAP!
The momentum of the coupled cars is 0.16 kg m/s
Explanation:
We can solve this problem by using the law of conservation of momentum: in absence of external forces, the total momentum of the two cars must be conserved before and after they couple together.
Mathematically, this can be written as
[tex]p_i = p_f\\m_1 u_1 + m_2 u_2 = p_f[/tex]
where:
[tex]m_1 = m_2 = 0.04 kg[/tex] is the mass of the two cars
[tex]u_1 =4 m/s[/tex] is the initial velocity of the first car
[tex]u_2=0[/tex] is the initial velocity of the second car, which is at rest
[tex]p_f[/tex] ithe momentum of the coupled cars, after the collision
By re-arranging the equation and substituting the values that we have, we find the final momentum:
[tex]p_f = m_1 u_1 + m_2 u_2 = (0.04)(4)+0=0.16 kg m/s[/tex]
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The momentum of the coupled toy cars after the collision is 0.16 kg·m/s.
In this problem, we are dealing with the conservation of momentum.
To find the momentum of the coupled cars, we first need to calculate the initial momentum of the moving car and then use the conservation of momentum principle to find the final momentum of the system.
Initial momentum of the moving car:
p = m * vwhere
m = 0.04 kg and v = 4 m/s.p = 0.04 kg * 4 m/s
p = 0.16 kg·m/s
Since the car is stationary, its initial momentum is 0 kg·m/s.
Add the momentum of both cars:
p(total_initial) = 0.16 kg·m/s + 0 kg·m/s p(total_initial) = 0.16 kg·m/sAfter collision, the cars couple together and move as a single object with a combined mass
Mt = 0.04 kg + 0.04 kg = 0.08 kg.Using the conservation of momentum principle, the total momentum before and after the collision remains the same. Thus:
p(total_initial)= 0.16 kg·m/sThe momentum of the coupled cars after the collision is 0.16 kg·m/s.
In the following reaction, 24 g of CH4 react with 96 g of Oz to form 66 g of CO2
How many grams of H2O are formed? CH4 + 202 → CO2 + 2H2O
Answer:
54 g
Explanation:
Mass is conserved. Mass of reactants = mass of products.
24 g + 96 g = 66 g + x
x = 54 g
The __________ perspective focuses on measuring the amount of intelligence a person has by using intelligence tests. A. cognitive B. intelligence C. testing D. creative
The testing perspective centers on measuring intelligence with tests, specifically analytical intelligence when examining data trends. Creative is not one of Gardner's Multiple Intelligences, and IQ tests' validity is contested due to potential bias.
Explanation:The correct answer to the student's question is the testing perspective, which focuses on measuring the amount of intelligence a person has by using intelligence tests.
When examining data for trends, the type of intelligence primarily used is analytical intelligence. Analytical intelligence is the ability to analyze, evaluate, judge, or compare and contrast information.
Among Gardner's Multiple Intelligences, creative is not one of the identified categories; instead, Gardner's intelligences include modalities such as spatial, linguistic, and musical intelligences.
Intelligence can be a broad concept and varies from person to person. Practical intelligence, or street smarts, is related to real-world problem-solving and can be distinct from what traditional IQ tests measure. The IQ test attempts to measure intelligence but has been subject to debate regarding its validity and the scope of abilities it assesses.
Conflict theorists argue that IQ tests may be biased because they may not give children with learning disabilities a fair chance to demonstrate their true intelligence, thereby limiting the understanding of each individual's unique capabilities.
Final answer:
The testing perspective focuses on measuring intelligence with intelligence tests, specifically referred to as the 'testing' perspective. This falls under the study of cognitive psychology, which examines human thinking and the various aspects of intelligence, including analytical ability and the debate over the validity of IQ tests. So the correct option is C.
Explanation:
The testing perspective focuses on measuring the amount of intelligence a person has by using intelligence tests. The correct answer is C. Testing. This relates to the domain of psychology where the quantification of human intelligence is often conducted through various assessments that aim to gauge different abilities in the areas of problem-solving, reasoning, memory, and other cognitive functions.
When it comes to examining data to identify trends, the type of intelligence predominantly used is analytical intelligence. Analytical intelligence refers to the ability to analyze, evaluate, judge, compare, and contrast information. In Howard Gardner's Multiple Intelligences theory, creative intelligence, while important for some types of problem-solving and innovation, is not listed as one of Gardner’s Multiple Intelligences. His theory includes types of intelligence such as spatial, linguistic, and musical, among others.
Cognitive psychology is the branch that focuses on human thinking. Questions around what intelligence is, how it varies from person to person, and whether or not 'street smarts' are a kind of intelligence, all fall under the study of cognitive psychology. Intelligence Quotient (IQ) tests aim to measure intellectual capabilities, but their validity and the extent to which they truly capture an individual's varied intelligence is a topic of ongoing debate.
A 1.5 kg ball is thrown upward at 10 m/s. What is its velocity when it is 2 m above the release point?
Answer:
7.75m/s or [tex]2\sqrt{15}m/s[/tex]
Explanation:
m = 1.5kg
u= 10m/s
s = 2m
a = [tex]10m/s^{2}[/tex]
v = ?
acceleration due to gravity is negative when an object is going up because the force of gravity reduces the speed of the object
using the formula ;
[tex]v^{2} = u^{2} - 2as[/tex] since the object is moving upwards (negative acceleration)
= 100 - 2(10)(2)
100 - 40
[tex]v^{2}[/tex] = 60
v = [tex]\sqrt{60}[/tex]
= 7.75m/s
Velocity is a vector quantity. The value of the final velocity for the given ball is 7.75 m/s.
From kinamatic equation,[tex]v^2= u^2 +2as[/tex]
Where,
[tex]v[/tex] - final velocity
[tex]u[/tex]- initial velocity = 10m/s
[tex]a[/tex] - acceleration = [tex]10 \rm \ m/s^2[/tex]
[tex]s[/tex] - speed =2 cm
Put the values in the equation,
[tex]v^2 = 100 - 2(10)(2)\\\\v = \sqrt {100-40}\\\\v = 7.75\rm \ m/s[/tex]
Therefore, the value of the final velocity for the given ball is 7.75 m/s.
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Why does carpet tend to produce differences in static electricity more that hardwood or tile floors
Carpet tends to produce differences in static electricity more than that of hardwood or tile floors because there's a release of negative charges which are called electrons to the person's body.
Static charge refers to the imbalance of electric charges that can be found on the surface of a material. When there's a contact between two surfaces, this creates a static electric charge.Also, it should be noted that a static charge is caused by friction. The reason why the charge is called static is due to the fact that the charges don't move or flow about but rather remain in one area.Carpet tends to produce differences in static electricity more than that of hardwood or tile floors because the rubbing helps in releasing negative charges which are called electrons.In such a case, when an individual shuffle their feet across a carpet, there will be a transfer of electrons unto the person and this then brings a static charge on the skin of the person.
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I need help with 6 and 7
Explanation:
6. Force = mass × acceleration
F = m Δv / Δt
F = (0.155 kg) (50.0 m/s − (-44.0 m/s)) / (0.00450 s)
F = 3240 N
7. Force = mass × acceleration
F = m Δv / Δt
75 N = (180 kg) (2.0 m/s − 0 m/s) / Δt
Δt = 4.8 s
why most quantum unites endin with On suffix ?
Answer:
OK... lets go the mathematical terms of magic is science and that the world is round ,GOD created everything Jesus died for us on the cross ,the big bang theory is something scientist believe if you are a christian then you know that is a lie and if you are a REDNECK then fishing and hunting is life and REDNECK think city people SUCK BUTT that is life.
Explanation:
Quantum units in physics generally end with the suffix "on" because they are named after famous scientists who made significant contributions to the field.
Explanation:In quantum mechanics, many units end with the suffix "on" because they are named after famous scientists who made significant contributions to the field. For example, the unit "electron" is named after J.J. Thomson, the physicist who discovered the electron. Similarly, the unit "photon" is named after Albert Einstein, who proposed the concept of light particles.
By using these named units, scientists can refer to specific quantities and entities in a concise and standardized manner. It helps in clear communication and facilitates research in the field of quantum mechanics.
Some examples of units in quantum mechanics that end with "on" include electron, photon, neutron, positron, and graviton.
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suppose a scientific team is trying to recreate the energy producing reactions that occur in the sun. what would they need for the experiments?
For energy producing reactions they need Hydrogen atoms, heat, and pressure for the experiments.
Explanation:
The initial step of the Hydrogen combination process: a core of Deuterium (2H) is shaped from two protons with the discharge of an antielectron and a neutrino. In the fundamental Hydrogen combination cycle, four Hydrogen cores (protons) meet up to make a Helium core.
An atomic combination response is characterized as the response wherein at least two lighter cores consolidate together to shape heavier cores with the arrival of high measures of vitality.
Combination can possibly give the sort of baseload vitality expected to give power to our urban communities and our enterprises. Maintainability: Fusion powers are generally accessible and almost limitless.
how do you calculate the braking distance
The braking distance is given by [tex]s=\frac{-u^2}{2a}[/tex]
Explanation:
When the driver of a car hits the pedal of the brakes, the car starts decelerating until it stops. Assuming the deceleration is constant, then the motion is a uniformly accelerated motion, so we can use the following suvat equation:
[tex]v^2-u^2=2as[/tex]
where
u is the initial speed of the car
v is the final speed of the car, which is zero because the car comes to rest:
v = 0
a is the acceleration of the car
s is the distance travelled by the car during the deceleration, so it is the braking distance
Therefore, re-arranging the equation for s, we find an expression for the braking distance:
[tex]s=\frac{-u^2}{2a}[/tex]
Note that the sign of [tex]a[/tex] is negative since the car is decelerating, therefore the final sign of [tex]s[/tex] is positive.
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What is something that is 0.5mm.
Answer:
An eraser top.
Explanation:
it is small enough to fit into that category
Answer: mechanical pencils
Explanation:
charles law states that at a constant pressure , the volume of a given amount of gas is _____ to its absolute temperature.
CHARLES'S LAW
At a constant pressure, the volume of a given amount of gas is directly proportional to its absolute temperature.
Answer:
Directly propotional
Explanation:
Charles law states that volume of a fixed mass of a given is directly propotional to its absolute temperature
And
V∞ T
PLZ HELP ME 4 MINS LEFT 50 POINTS AND BRAINLEIST
Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.
Answer:
Explanation:
Work is applying a force to move an object over a distance. ... Machines make work easier by changing the strength or direction of a force. ... But many everyday objects, such as rakes, bottle openers, and ramps, are machines too. ... A flat surface (plane) set at an angle (inclined); a simple machine used to reduce the force ...
Answer:
true
Explanation:
After missing an approaching ball, a baseball player applies a torque of 36.2 Nm To slow the bat from 3.5 rev/s to 0.25 rev/s in 0.21 seconds. What is the magnitude of the angular acceleration of the bat in rad/s²
PLZ HELP!
Which is NOT an example of a longitudinal wave?
The 1st example is NOT a longitudinal wave
Explanation:
Waves are periodic disturbance of the space that travel carrying energy but not matter.
Depending on their vibration, waves are classified into two types:
Transverse waves: in transverse waves, the vibration of the wave occurs in a direction perpendicular to the direction of propagation of the wave. Examples of transverse waves are electromagnetic waves.Longitudinal waves: in longitudinal waves, the vibration of the wave occurs in a direction parallel to the direction of propagation of the wave (back and forth), creating regions of higher particle density (compressions) and lower particle density (rarefactions). Examples of longitudinal waves are sound waves.In this problem we have four options given:
The first picture represents a transverse wave, because the vibration of the robe is up and down, while the wave propagates on the left-right directionThe second picture represents a sound wave, which is a longitudinal waveThe 3rd picture represents a longitudinal wave, since the vibration of the slinky is back and forth along the direction of propagationThe 4th picture also represents a sound wave, which is longitudinalTherefore, the only wave which is not longitudinal is the one in the 1st picture.
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Longitudinal waves are those where the displacement of the medium is along the direction of the wave's propagation, such as sound waves. An example that does not fit into this category is light waves, which are transverse waves, having their oscillations perpendicular to the direction of the wave's movement.
Explanation:Longitudinal waves are waves in which the displacement of the medium is in the same direction, or opposite direction, to the direction of propagation of the wave. Examples are sound waves and seismic P-waves. However, an example of a wave that is not longitudinal would be light waves.
Light waves are transverse waves. This means that their oscillations are perpendicular to the direction of energy transfer. Unlike longitudinal waves, which contain compressions and rarefactions, transverse waves have peaks and troughs.
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1. Stephanie Schneider is running down the street at 10 m/s. She sees a double-tall latte on
the road ahead of her and starts sprinting. After 5 seconds have passed, Stephanie is
running at 15 m/s. Assuming she does not change direction, what was Stephanie's
acceleration?
Stephanie's acceleration is 1 m/[tex]s^{2}[/tex].
Explanation:
In the present case, the initial velocity of the runner is given as 10 m/s. After 5 s, the runner runs with velocity of 15 m/s. If there is no change in direction, then the acceleration can be found easily as the change in velocity per unit time.
So, [tex]Acceleration = \frac{Change in velocity}{Time}=\frac{(Final velocity -Initial velocity)}{Time}[/tex]
[tex]Acceleration = \frac{15-10}{5}=\frac{5}{5}=1 m/s^{2}[/tex]
Thus, the acceleration will be 1 m/[tex]s^{2}[/tex].
So the change in velocity will lead to an acceleration of 1 m/[tex]s^{2}[/tex].
Answer:15m/s-10m/s over 5s
Explanation:its a fraction the 15m/s and 10m/s are over the 5s
A 2 kg watermelon is dropped from a 4 m tall roof. How fast will the watermelon be moving as it strikes the ground below?
Answer:
8.85m/s
Explanation:
v=√2gh
v=√2×9.8×4
v=8.85m/s
The watermelon be moving as it strikes the ground below 8.85m/s.
Potential energy is the energy possessed by a body because of its position relative to other bodies.Gravitational potential energy is the energy held by a body when it is at some height relative to the zero potential level ground.The formula that is used to find the velocity in this case is:
[tex]v=\sqrt{2gh} \\\\v=\sqrt{2*9.8*4}\\\\v=8.85m/s[/tex]
Thus, the velocity will be 8.85 m/s.
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