Tag: the essence of change

Questions Related to the essence of change

The form of energy that wood can be categorized into is:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. chemical energy

  2. electrical energy

  3. potential energy

  4. muscular energy

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Correct Option: A
Explanation:

You'd burn it, just like you might burn coal or oil or natural gas. The stored energy in the wood is chemical energy, meaning that it can be released by a chemical reaction (burning). It's closely related to those fossil fuel energies, because the chemical energy was formed by photosynthesis, using energy from sunlight as the input.

An atom bomb converts __________ into heat and sound energy.

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. electrical energy

  2. heat energy

  3. mechanical energy

  4. atomic energy

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Correct Option: D
Explanation:

An atomic bomb contains atomic energy which is converted to heat and sound energy.

From the following statements find the one that is NOT correct:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. A flying bird has both potential and kinetic energy.

  2. A ball rolling on the ground has kinetic energy but no mechanical energy.

  3. A stretched rubber band has potential energy

  4. Chemical energy can be converted into electrical energy

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Correct Option: B
Explanation:

A body having either. Kinetic' energy or Potential energy or both is said to be having Mechanical energy.

A wound spring has:

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. chemical energy

  2. magnetic energy

  3. mechanical energy

  4. muscular energy

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Correct Option: C
Explanation:

A wound spring has mechanical energy.

The form of energy that water stored in a dam primarily has is :

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. muscular energy

  2. kinetic energy

  3. potential energy

  4. magnetic energy

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Correct Option: C
Explanation:

the water in dam is stored is standing still, it isn't moving. 

Thus, it has potential energy.

Which of the following quantity is different from others ?

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. Work

  2. Kinetic energy

  3. Force

  4. Potential energy

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Correct Option: C
Explanation:

Force has a unit of newton while K.E ,work and potential energy occurs due to some applied force,and their unit is joule.

The flowing water of a river possesses ...... energy.

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. gravitational

  2. potential

  3. electrical

  4. kinetic

Show answer
Correct Option: D
Explanation:

Water, like many substances, contains two kinds of energy. The first kind of energy is called kinetic energy. This is energy that is used during the execution of processes, such as movement. Because of kinetic energy water can flow and waves can exist.
But water can also contain potential energy. This is energy that is stored in the water. Stored, but not used. This energy can become useful when water starts to flow. It will be transferred to kinetic energy and this will cause movement.
so it is clear that flowing water have kinetic energy .

so best possible answer is option D.

The form of energy stored in kerosene is :

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. Chemical

  2. Heat energy

  3. Magnetic

  4. Mechanical

Show answer
Correct Option: A
Explanation:

When kerosene burns its hydrocarbons react with oxygen and produces heat and light energy, so some chemical enwrgy is stored in the kerosene because energy can neither b created nor b destroyed.

So best option is option A.

When you climb a staircase, you spend______ energy and gain ____energy.

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. Kinetic - potential

  2. Chemical - electrical

  3. Muscular - kinetic

  4. Muscular - potential

Show answer
Correct Option: D
Explanation:

When someone climb staircase then he has to do so physical work, so some muscular energy is spemt, also if his relative position wrt earth chamges so some gain in kinetic energy of the body, body was initial at rest amd finaly at rest so no kinetic energy is gained or lost.

So best possible answer is option D.

Which of the following may no be conserved for an isolated system 

physics the essence of change forms of energy and energy conservation energy for everything forms of energy

  1. Energy

  2. Potential energy

  3. Mechanical energy

  4. Kinetic energy

Show answer
Correct Option: B,C,D
Explanation:

In an isolated system only $T.E$ is conserved $M.E$ can not be conserved in case of inelastic collision$.$ Some energy is converted into heat$.$ and sum of $P.E,K.E$ and lost energy remains const$.$

Hence,
option $b,c,d$ is correct answer.