The function of a capacitor in an electric circuit is to A. allow current flow between its plates.
B. store electric charges.
C. increase circuit power.
D. measure the amount of current in the circuit.

Answers

Answer 1

Answer:

Answer: B. store electric charges.

Explanation: I JUST TOOK THE PF EXAM AND I GOT IT CORRECT!!!!

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Answer the above questions and give an example of a cause and effect relationship. See if you can think up a cause and effect relationship using acids, bases, and neutralization.

Answers

Answer:

C. would be the correct option

Explanation:

Burning gasoline is a chemical change because when gasoline is ignited, water and carbon dioxide are produced. Water freezing to form ice would be a physical change since its state of matter has changed, but not the water itself. Sugar dissolving in water is also a physical change because all it's really doing is just forming bubbles and changing the color. Choice D. would also be a physical change since the piece of metal is still a piece of metal, it just expanded when the temperature increased.

What is the main force that causes a star to turn into a black hole?Temperature
Gravity
Pressure
Nuclear explosions.

Answers

Gravity. When a dying star of sufficient mass is no longer to support nuclear reactions in its core, it loses the pressure in the core that supports the entire star. Since there is now nothing to counter its own gravity, the entire star implodes until it becomes either a neutron star or, if its mass is large enough, a black hole.

Which atomic number is the threshold value below which fusion may occur?

Answers

Answer:

The atomic number 26(iron) is the threshold value below which the fusion might occur.

Explanation:

Nuclear fusion is a reaction in which two or more nuclei are combined to form one or more different atomic nuclei and subatomic particles.

Energy released in a fusion reaction is because of a key feature of nuclear matter called the binding energy which is a measure of the efficiency with which its constituent nucleons are bound together.

As we go up in atomic number, the energy released per nuclei goes down until it hits a minimum which is for atomic number 26 (iron) and fusion is not possible.

Answer:

Atomic no. 26 i.e. Iron

Explanation:

Nuclear Fusion is a process in which two or more nucleus are fused(combined) together to make heavier nucleus and release a lot of energy and other subatomic particles in the process. Considerable amount of energy is required to fuse the nucleus together but the output energy is much more than the input energy. It becomes an exothermic process.

In case of heavier nuclei, this doesn't hold true as the process becomes endothermic. That means the output energy will be way lesser than the input energy given to fuse the nucleus. This happens for elements of atomic no. 26 or above. Even in stars we can find element till atomic no. 26 as they can be formed by fusion. When a star reaches to iron fusion stage that is the end of it and it explodes into a supernova.

a plane is traveling at a velocity of 50 m/s. it accelerates at a constant rate of 0.5 m/s until it's velocity reaches 65 m/s. what distance did the plane cover while it was accelerating?

Answers

Answer:

Displacement = 1725m

Explanation:

$t = (u-v)/(a)$

$t = (65-50)/(0.5) = 30s$

$s = ut+(1)/(2)at^(2) \ns = 50*30 + (1)/(2) *0.5*30^(2) = 1725m$

Final answer:

Using the equations of motion, we find that the plane covers a distance of 850 meters while it is accelerating from a velocity of 50 m/s to 65 m/s at the rate of 0.5 m/s².

Explanation:

You're asking about a motion problem in physics that requires using the equations of motion to solve. In this case, the formula we would use is v² = u² + 2as, where 'v' is the final velocity, 'u' is the initial velocity, 'a' is acceleration, and 's' is the distance covered.

Given:
Initial velocity (u) = 50 m/s
Final velocity (v) = 65 m/s
Acceleration (a) = 0.5 m/s²

We are asked to find the distance covered (s). Rearranging the formula to find 's', we get: s = (v² - u²) / 2a

Substituting the given values, the distance covered (s) = (65² - 50²) / (2*0.5) = 850 meters. So, the plane covers a distance of 850 meters while it is accelerating.

Learn more about Equations of Motion here:

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Name a force that opposes the movement of an object through water.

Answers

that is frictional force

Which states the law of conservation of energy?A.
Energy cannot be created or destroyed, but it can be converted or changed into different forms.

B.
Energy can be created or destroyed, and it can be converted or changed into different forms.

C.
Energy cannot be created or destroyed, nor can it be converted or changed into different forms.

D.
Energy can be created or destroyed, but it can not be converted or changed into different forms.

Answers

Statement A is correct. Energy cannot be created or destroyed it can only be converted or changed into different forms.

The other forms include kinetic, potential and internal energy. Heat, and work are also other forms of energy.

b. Energy can be created or destroyed, and it can be converted or changed into different forms.

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