Tag: the essence of change

Quizzes (5) Questions (143)

Questions Related to the essence of change

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

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

  1. chemical energy

  2. electrical energy

  3. potential energy

  4. muscular energy
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

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

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

  1. gravitational

  2. potential

  3. electrical

  4. kinetic
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

The form of energy stored in kerosene is :

  1. Chemical

  2. Heat energy

  3. Magnetic

  4. Mechanical
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Kinetic - potential

  2. Chemical - electrical

  3. Muscular - kinetic

  4. Muscular - potential
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Energy

  2. Potential energy

  3. Mechanical energy

  4. Kinetic energy
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
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.