Answer:
5.5 billion years
Explanation:
The answer
Answer:
5 billion years
Explanation:
A star like the Sun is called a main sequence star. It is considered as young age star. Sun is a medium sized star and its mass determines how long it can continue in its present form.
Its heat and light are a result of the thermonuclear fusion reactions that occur in its core. The proton cycle and carbon cycle are responsible for generating the immense energy which is released in the form of heat and light. The amount of nuclear fuel ( hydrogen helium) present in the sun indicate that it can continue glowing at this state for another 5 or 5.5 billion years more. Sun formed abut 4.6 or 5 billion years ago, as shown from the calculations.
I lean against a wall, applying force. Which could be described as the “reaction force?”
A. My force against the wall
B. The walls force against me
C. The force of gravity
D. No reaction
E. Not enough information
The answer is B The Wall Force Against Me
What describes how the spring constant affects the potential energy of an object for a given displacement from an equilibrium position?
Answer:
The higher the spring constant, the greater the elastic potential energy.
Answer:
ITS C JUST FINISHED
Explanation:
Why don’t you fall through the floor
Oil ________.
A. Is a renewable resource
B. Releases more toxins than coal
C. Must mined from underground
D. Can be replenished
Oil must be mined from underground.
what is the deceleration of a bicycle that goes from 40m/s to 20m/s in 5 seconds
Answer:
[tex]-4 m/s^2[/tex]
Explanation:
The acceleration of the bycicle is given by:
[tex]a=\frac{v-u}{t}[/tex]
where
v = 20 m/s is the final velocity of the bike
u = 40 m/s is the initial velocity
t = 5 s is the time interval
Substituting numbers, we find
[tex]a=\frac{20 m/s-40 m/s}{5s}=-4 m/s^2[/tex]
and the acceleration is negative, which means that the bycicle is slowing down.
Ken’s community is completely dependent on agriculture for their income. They cultivate and breed domestic species for their food. Ken lives in which society?
A.
hunter-gatherer
B.
modern
C.
primitive
D.
agrarian
Answer:
D. agrarian
Explanation:
The agrarian society is a society that is strictly revolving around the agriculture and animal farming for its survival. In this type of society, the people are only engaged in producing food, be it by planting and raising certain crops or breeding domesticated animals. The main purpose of this type of society is to be able to produce enough food for the whole year, so it is a self maintaining society that consumes as much as it produces. The situation described about Ken is a reflection of this type of society.
Answer: = D. agrarion
which of the following best describes to use for non-renewable resource?
California has several power plants that use heat from the Earth to generate electricity
in the state of Texas you can find miles of windmills that are used to generate electricity
natural gas is a great alternative to electricity for cooking
the electronic signs along the highway are run by solar power
Answer:
the answer is the last one
The electronic signs along the highway are run by solar power - this statement best describes to use for non-renewable resource.
What is a non-renewable resource?A nonrenewable resource exists as a substance that is being utilized more quickly than it can substitute itself. Most fossil fuels, minerals, and metal ores exist as nonrenewable resources. Renewable resources such as solar and wind power and water exist unlimited in supply. Non-renewable energy creates up 95 percent of the world’s electricity needs. Most sources of non-renewable energy exist as fossil fuels such as petroleum, coal, gas, and oil. on-renewable energy exists energy sources that will ultimately run out when put to work.
The correct answer is option D.
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A force that causes an object to change its motion is called a(n) _______
a. unbalanced force
b. resistant force
c. compound force
d. unnatural force
Answer:
I believe it is A. Unbalanced.
Explanation:
Hope i helped you!
Unbalanced force causes an object to change its motion.
Answer: Option A
Explanation:
A force can be explained as push or a pull that has the tendency to change the velocity of a mass.
The force that makes any change in the movement of an object or body is known to be an unbalanced force. These forces are not equal and opposite. When an object is placed in a rest position and when unbalanced force acts on it, this will not make the object to move.
Example: Force applied against the ball.
The forces whose size is equal and opposite in their direction are known as balanced force. These forces will not make any change in motion of a body. When an object is placed in a rest position and when balance force acts on it, this will not make the object to move.
Example: Pushing against a wall.
Around how many miles is a light year
Answer:
5,878,625,373,183.6 miles
How much potential energy does a 20-kg barrel have when it is in the truck whose floor is 5.0 m above the ground? P.E. = J
Answer:
980J
Explanation:
Look at the figure above. Which position of the earth represents an equinox?
A. End of summer
B. Beginning of winter
C. Beginning of autumn
D. Middle of spring
'A' and 'C' are the same point in time. When Summer ends, Autumn begins. An equinox occurs at that time.
The position of the Earth represents an equinox are A and C.
What is an equinox?Equinox means both of the twice every year (as about March 21 and September 23) when the Sun crosses the equator and day in and day out are wherever on earth of around equivalent length.
The end of summer and the beginning of autumn occurs at the same point in time. When Summer ends, Autumn starts. An equinox occurs at this time.
Thus, the correct option are A and C.
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Which choice correctly ranks these items from smallest to largest?
carbon atom
comma
E. coli bacteria cell
electron
quantum dot
electron - carbon atom - quantum dot - E. coli bacteria cell comma
comma - carbon atom - E. coli bacteria cell - quantum dot - electron
carbon atom - electron - E. coli bacteria cell - quantum dot comma
electron - carbon atom -- comma - E. coli bacteria cell - quantum dot
Answer:
your answer is: electron → carbon atom → quantum dot → E. coli bacteria cell → comma
Explanation:
Answer:
A.
Explanation:
Edge 2021
Starting from rest, the distance a freely-falling object will fall in 0.50 second is?
Answer:
1.23 m
Explanation:
The vertical distance covered by a free-falling object starting from rest in a time t is
[tex]y=\frac{1}{2}gt^2[/tex]
where
g = 9.8 m/s^2 is the acceleration due to gravity
In this problem, we have
t = 0.50 s
So the distance covered is
[tex]y=\frac{1}{2}(9.8 m/s^2)(0.50 s)^2=1.23 m[/tex]
( Image is 6 C carbon with the numbers 12.011 under it ) According to the image, the atomic mass of carbon is 12.011. How is the atomic mass of carbon, or any other element, determined? A. By adding the number of protons and the number of electrons B. By adding the number of protons and the number of neutrons C. By adding the number of protons, the number of neutrons, and the number of electrons D. By identifying the number of protons
Answer:
B. By adding the number of protons and the number of neutrons
Explanation:
The atomic mass is determined by adding the number of protons and neutrons in an atom. An atom is made up of three fundamental particles: Electrons, Protons and Neutrons.
The protons and neutrons occupy a central region in an atom known as the nucleus. The nucleus is positively charged and mass concentrated.
If we compare the relative masses of the subatomic particles, the masses of protons and neutrons would be 1 and that of an electron would be 1/1840. This shows that the mass of electrons are negligible.
In order to ascertain atomic mass, we therefore add the number of protons and neutrons together. This is how we arrive at 12.011 as the value of the atomic mass of C and for other elements.
The atomic mass is also known as the mass number.
The atomic mass of an element including carbon is determined by adding the number of protons and neutrons in its most common atomic form. Electrons do not appreciably contribute to the atomic mass due to their extremely small mass.
Explanation:The atomic mass of carbon, as presented in the image, is 12.011. This is determined by the sum of the number of protons and neutrons in most common form of an atom of an element. For example the most common isotope of carbon, Carbon-12, has six protons and six neutrons for a total of 12 subatomic particles in its nucleus. This means the mass number of Carbon-12 is 12.
Note that electrons, while they are part of the atom, do not appreciably contribute to the mass of an atom because their mass is exceedingly small. Thus, in response to the question the atomic mass of an element is determined by B 'By adding the number of protons and the number of neutrons' .
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1. How does potential energy differ from kinetic energy?
Answer:
Read Below for answer
Explanation:
Kinetic energy is the kind of energy present in a body due to the property of its motion
Potential Energy is the type of energy present in a body due to the property of its state
Final answer:
Potential energy is stored energy due to position or state, able to have both positive and negative values, while kinetic energy, always positive, refers to the energy of motion. Energy can transition between these two states, and kinetic energy correlates directly with the speed of an object.
Explanation:
Potential energy differs from kinetic energy in that it represents the energy stored within an object due to its position or state, whereas kinetic energy is the energy of motion. An essential distinction between potential energy and kinetic energy is that potential energy can have a negative value when it implies a release of stored energy, leading to it being lower than the initial state.
Conversely, kinetic energy is always a positive value because it is directly correlated with motion—it increases as the speed of the object increases.
An example of potential energy is a stretched bow, whereas a revolving wheel illustrates kinetic energy. Energy can transition between potential and kinetic; for instance, when a ball reaches the peak of its bounce and begins to fall, its potential energy converts to kinetic energy.
The different types of potential energy, such as elastic, gravitational, and chemical, have unique sources and characteristics but share the common feature of being stored energy that can be converted to kinetic energy under the right circumstances.
What is the effective resistance between the points A and D? A) 1.3 Ω B) 2.2 Ω C) 10 Ω D) 12 Ω
Answer:
D
Explanation:
The resistors are in series (lined up in a row). So the overall resistance is the sum:
R = 3.0 Ω + 4.0 Ω + 5.0 Ω
R = 12 Ω
Answer is D.
HELP ASAP! GIVING BRAINLIEST!!
How could you give a pendulum more energy?
Answer:
swinging it with more force
Explanation:
swinging it hardly with more energy
Answer: You have to push it.
Explanation: Since you are pushing the pendulum, the energy from your hand transfers to the pendulum and the pendulum gains more kinetic energy. If you are writing an essay, change this a bit so you won't be caught plagiarizing. Please give a brainliest so I can continue giving answers like this.
The total power input to the solar cell is 2.4W when the efficiency is 0.20.
Calculate the useful power output of the solar cell using the following equation:
The useful power output of the solar cell using the following equation will be 0.48 W. Power rating is an efficiency perameter.
What is the power rating?The maximum power input allowed to pass through a piece of equipment is known as the equipment's power rating.
The power rating or the efficiency is found as;
[tex]\rm \eta = \frac{P_{OUT}}{P_{IN}} \\\\ P_{OUT}}= \eta \times {P_{IN} \\\\[/tex]
[tex]\rm P_{OUT}= 0.20 \times 2.4 \\\\ P_{OUT}= 0.48 \ W[/tex]
Hence, the useful power output of the solar cell will be 0.48 W
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Please Help!! 50 points!
Answer first question then the question for the 2nd one " name the first 8 planets in order.
Thank you so much!
Answer:
2.Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
Explanation:
1. I do not understand what is being asked.
If you could comment with more understandable question ill do my best to help. (:
Answer:
Star y is closer
Explanation:
The brighter the star appears the closer it is to the earth. That is why the sun seems like the biggest and brightest star but in reality it is just closer than other stars.
Mercury, venus, earth, Mars, Jupiter, Saturn, Uranus, and Neptune
Water moves to the top of tall trees because of _____.
capillary action
surface tension
capillary action and evaporation
vapor pressure
Answer:
capillary action and evaporation
Explanation:
The pulling effect of evaporating water from the leaves and other parts of plants provides the driving mechanism for water to reach greater parts in a plant. Evaporation of water during a hot day would cause water to rise through conduit-like pipes in plants which leads to rise of water from the root to areas that lacks them.
This process is even made much more easier by capillary action which is the unaided movement of water or fluid in a narrow tube as a result of its own pressure. Evaporation would facilitate the process of capillary action and together, they both drive water to greater reaches of plants from the root.
Describe the benefits and risks associated with nuclear energy.
Producing nuclear energy is far more environmentally friendly than burning fossil fuels. That is the main benefit.
The main risk is radiation. If the nuclear waste is not properly disposed of, it can leak radiation into the environment. Fortunately, this is not an issue since there are ways to deal with it. There is also the risk of a disaster like the Chernobyl incident, however that was mostly due to faulty reactor construction. However, reactors today are built to avoid such issues.
Nuclear energy is the energy released during nuclear fission or fusion, especially when used to generate electricity.
What are the benefits and risks associated with nuclear energy?Advantages
Nuclear is the largest source of clean power in the United States. It generates nearly 800 billion kilowatt-hours of electricity each year and produces more than half of the nation’s emissions-free electricity. The nuclear industry supports nearly half a million jobs in the United States and contributes an estimated $60 billion to the U.S. gross domestic product each year. They also contribute billions of dollars annually to local economies through federal and state tax revenues.A strong civilian nuclear sector is essential to U.S. national security and energy diplomacy. The United States must maintain its global leadership in this arena to influence the peaceful use of nuclear technologies.Disadvantages
Commercial nuclear power is sometimes viewed by the general public as a dangerous or unstable process. This perception is often based on three global nuclear accidents, its false association with nuclear weapons, and how it is portrayed on popular television shows and films.Many people view used fuel as a growing problem and are apprehensive about its transportation, storage, and disposal. Building a nuclear power plant can be discouraging for stakeholders. Conventional reactor designs are considered multi-billion dollar infrastructure projects. High capital costs, licensing and regulatory approvals, coupled with long lead times and construction delays, have also deterred public interest.High operating costs.To learn more about nuclear energy, refer to: https://brainly.com/question/1013815
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Sound waves are mechanical waves. Which statement is true for this type of wave?
Answer:
Electromagnetic waves do not require a medium in order to transport their energy. Mechanical waves are waves that require a medium in order to transport their energy from one location to another. ... Sound is a mechanical wave and cannot travel through a vacuum.
Sound waves are mechanical waves that require a medium to travel through, and consist of longitudinal pressure waves, exhibiting features like frequency which determines pitch. They transfer energy, not mass, and the speed of sound depends on the medium's properties.
Explanation:Sound waves are mechanical waves, which means they require a medium, such as air, water, or solid materials, to transmit energy. Unlike electromagnetic waves, mechanical waves cannot travel through a vacuum; they need a physical medium to propagate. Sound waves, specifically, are longitudinal pressure waves which means they consist of compressions and rarefactions in the medium. Within these waves, energy is transferred from one location to another, but not mass itself. The speed at which sound waves travel depends on the physical properties of the medium they move through.
Additionally, sound waves have characteristics like amplitude, wavelength, period, and frequency. Frequency is particularly significant as it determines the pitch of the sound; higher frequencies result in higher pitches, while lower frequencies result in lower pitches. The frequency of sound is measured in hertz (Hz), which represents the number of waves that pass a point per unit of time. Humans typically hear frequencies between 20 and 20,000 Hz, and this range decreases with age. Animals, however, can perceive higher frequencies than humans, such as dogs hearing up to about 40,000 Hz and dolphins up to 150,000 Hz.
Which of the following statements about the nuclear strong force is true?
the strength of the nuclear strong force depends on the charge of the atom
the nuclear strong force drops to practically nothing at large distances
the nuclear strong force is responsible for one flavor (type) of quark turning into another flavor (type)
the nuclear strong force is responsible for the sun's nuclear fission process
Answer: 2, the nuclear strong force drops to practically nothing at large distances.
Explanation: The protons and neutrons in the nucleus share subatomic particles called pions. This exchange is what keeps the protons and neutrons stuck together in the nucleus. Despite the strong force being the strongest force, it has a very small range. This is because pions have very short lifespans. So, the strong force would have literally no effect at large distances.
Hope that helped! :)
The true statement is; "the nuclear strong force drops to practically nothing at large distances"
What is nuclear force?
The nuclear force refers to that attractive force that holds the nucleons together in the nucleus of an atom. These are short range forces and seek to minimize the degree of repulsion in the nucleus.
One statement that is true about the nuclear strong force is; "the nuclear strong force drops to practically nothing at large distances".
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Would these two waves produce a standing wave?
yes, because the waves are traveling in opposite directions
yes, because the waves are traveling in the same direction
no, because the waves do not have the same wavelength
no, because the waves do not have the same amplitude
Answer:
no, because the waves do not have the same amplitude
Explanation:
what are some signs of physical change
Answer:
Common Physical Changes. Texture. Color. Temperature. Shape. Change of State.
Physical Properties. Luster. Malleability. Ability to be drawn into a thin wire. Density. Viscosity.
Common Chemical Changes. Change in Temperature. Change in Color. Noticeable Odor. Formation of a Precipitate.
Explanation:
Physical changes can be reversed usually by heating or cooling a substance, without any chemical bonds being broken.
Chemical changes CANNOT be reversed due too the chemicals being broken and forming something new.
Btw, I know you didn't need chemical change, but I put it in there anyway. Hope it helps.
Answer: if you are talking about the body then increased hormones as physical changes with growing in sexual parts and for guys increase in with muscles and growing in breast.
If it was of a change in physical properties. as of natural in universe then it would be melting, transition to different states of matter.
Explanation:
When everyone gets of age they grow and mature and these kind of changes happen
The reason for that would be of the change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density, These are some examples of physicals changes
Kendall does 30 Newton-meters of work pushing her sofa halfway across the living room. Her living room is 10 meters
long. How much force did Kendal use?
30 Newtons
10 Newtons
3 Newtons
unknown
Answer:
3 Newtons
Explanation:
The work done by Kendall is given by:
[tex]W=Fd[/tex]
where
F is the force
d is the displacement of the sofa
In this problem, we know
W = 30 Nm = 30 J
d = 10 m
So we can solve the formula for F to find the force used by Kendal:
[tex]F=\frac{W}{d}=\frac{30 J}{10 m}=3 N[/tex]
Final answer:
To find the force Kendall used to push her sofa, we divide the work done (30 Nm) by the distance (5 m), which equals 6 Newtons. However, since this answer is not among the options, the force Kendal used is unknown.
Explanation:
The question asks how much force Kendall used to push her sofa halfway across her living room when she did 30 Newton-meters of work. Since work equals force times distance (Work = Force x Distance), we can rearrange the formula to solve for force (Force = Work / Distance). In this case, Kendall pushed the sofa 5 meters (halfway across a 10-meter room), so the force she exerted can be calculated as follows:
Force = Work / Distance
Force = 30 Nm / 5 m
Force = 6 Newtons
However, this value does not match any of the options provided in the question. Therefore, based on the given answer choices, the force Kendal used is unknown.
Select all the correct answers.
According to Newton’s law of universal gravitation, which statements are true?
As we move to higher altitudes, the force of gravity on us decreases.
As we move to higher altitudes, the force of gravity on us increases.
As we gain mass, the force of gravity on us decreases.
As we gain mass, the force of gravity on us increases.
As we move faster, the force of gravity on us increases.
Reset Next
According to the law of gravitation given by Newton, higher the altitudes, less the force of gravity experienced.
Answer: Option A.
Explanation:
The law of gravitation given by Newton, said that the gravity force is experienced more when close to the Earth. Therefore, increase in altitude, means that the individual or the object has gone much above the sea floor, and as the distance increases the force decreases. The force of gravitation is “inversely proportional to distance”.
According to Newton’s law of universal gravitation, the statements which are true are "As we move to higher altitudes, the force of gravity on us decreases "and "As we gain mass, the force of gravity on us decreases".
Newton’s law of universal gravitation:
According to this law, every particle of matter is said to pull towards every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
It can be expressed as:
F = (G × m1 × m2) / r²
F: gravitational force between two objects,
G: gravitational constant
m1 and m2: masses of the two objects
r: distance between the centers of the two objects.
The force of gravity weakens with increasing distance from the center of the Earth. As we move to higher altitudes, the distance between us and the Earth's center increases, resulting in a decrease in the force of gravity.The force of gravity is directly proportional to the mass of the objects involved. Therefore, by gaining mass, the force of gravity between us and other massive objects increases.Therefore, the correct statements are: As we move to higher altitudes, the force of gravity on us decreases "and "As we gain mass, the force of gravity on us decreases".
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Which statement describes Rutherford model of an atom
Can you give us the statements?
which phrases describe this plate boundary? check all that apply.
•may occur in oceans
•may form rift valleys
•is a type of transform boundary
•is a region where earthquakes occur
Answer:
A region where all earthquakes occur
Explanation:
Answer: Option (3)
Explanation: In the given image, the plate boundary that is being shown is a transform plate boundary, in which the two plates are moving, slide passing one another. Here neither plate destroys nor creates. For example, The San Andres fault.
The areas that are included in this transform plate boundary are very prone to earthquakes and tsunamis. Earthquake generates when the plates rubs one another, releasing energy that causes seismic waves to propagates. This causes an earthquake of varying intensity.
Thus, the correct answer is option (3).
Suppose a rock is dropped off a cliff with an initial speed of 0m/s. What is the rocks speed after 5 secounds, in m/s, if it encounters no air resistance?
After 5 seconds, the rock would be traveling at 49 m/s provided there is no air resistance.
To determine the speed of the rock after 5 seconds of free fall without air resistance, we can use the equation of motion under constant acceleration due to gravity. The relevant formula, which is derived from the laws of motion, is:
v = u + at
Where:
v is the final velocity (what we want to find)
u is the initial velocity
a is the acceleration due to gravity (approximately 9.8 m/s² on Earth)
t is the time for which the object has been falling
Since the rock is dropped (meaning no initial velocity), u = 0 m/s. Thus, the equation simplifies to:
v = at
Substituting known values, we get:
v = 9.8 m/s²×5 s
v = 49 m/s
The speed of the rock after falling for 5 seconds from a cliff, in the absence of air resistance, can be calculated using the formula v = gt, where g is the acceleration due to gravity. After 5 seconds, the rock's speed will be 49 m/s.
The question asks for the speed of the rock after 5 seconds if it is dropped from a cliff with no air resistance. To solve this, we can utilize the formula for the velocity of a falling object due to gravity, which is v = gt, where 'v' is velocity, 'g' is the acceleration due to gravity (approximately 9.8 [tex]m/s^2[/tex] on Earth), and 't' is the time in seconds.
In this case, the initial speed is 0 m/s, so after 5 seconds the speed of the rock would be:
v = 9.8 [tex]m/s^2[/tex] × 5 s = 49 m/s
Therefore, the rock's speed after 5 seconds will be 49 m/s, assuming that there is no air resistance.