Energy

Question 1

What is energy?

Answer 1

The capacity or power to do work, such as the capacity to move an object by the application of force.

Question 2

Things that use kinetic energy

Answer 2

Flying insects
Buses
Flying aeroplane
Baseball thrown by a pitcher

Question 3

What’s kinetic energy

Answer 3

energy which a body possesses by virtue of being in motion.

Question 4

Motion definition

Answer 4

process of moving or being moved.

Question 5

Potential energy

Answer 5

energy that has the potential to do work and so the energy is ‘stored’, such 339as gravitational energy, elastic energy and chemical energy

Question 6

Stored energy

Answer 6

Energy is stored into gravitational genetic elastic potential energy Connecticut energy gravitational potential energy

Question 7

Gravitational energy

Answer 7

potential energy of an object elevated above the ground)

Question 8

Elastic energy

Answer 8

(energy stored by an elastic object that is stretched, such as a spring or rubber band)

Question 9

Chemical energy

Answer 9

(energy stored in chemicals that, when reacted together such as in burning reactions, release heat, sound or light)

Question 10

Transformations of potential

Answer 10

Ocean thermal power (Heat → Electric energy) Hydroelectric dams (Gravitational potential energy → Electric energy

Question 11

Kinetic energy transformation

Answer 11

Electric generator (Kinetic energy or Mechanical work → Electric energy)

Question 12

Energy transformations

Answer 12

Energy is transformed into different types of energetic like light or heat, while it happens it loses lots of energy which doesn’t make it very efficient

Question 13

Conduction

Answer 13

Conduction is the transfer of heat from one molecule to another through a substance. 


Question 14

Convection

Answer 14

The particles that make up solids are close to each other and held together tightly. They can vibrate faster only when heated (and conduction occurs).
In liquids and gases the particles are further apart and can move around.
So when liquids and gases are heated, rather than the vibration passing between particles, the particles themselves can move.
Heat can travel through liquids and gases by a process called convection.

Question 15

Radiation

Answer 15

Heat from the sun reaches the Earth by radiation.
Heat transferred in this way is called radiant heat.
Heat transfer by radiation is much faster than heat transfer by conduction or convection.

Question 16

Reflected

Answer 16

Bounces off,
Light colour surfaces tend to reflect light and radiated heat away. The temperature of these object doesn’t change that quick when heat reaches them by radiation

Question 17

Transmitted

Answer 17

passed through something, such as light or sound passing through air,
Clear objects like glass, allow light and radiant heat to pass through them
The temperature of these objects does not increase quickly when heat reaches them by radiation.

Question 18

Absorbed

Answer 18

Taken in
Dark coloured objects tend to absorb light and radiant heat. Their temperatures increase quickly when heat reaches them by radiation

Question 19

Describe visible spectrum

Answer 19

We only see white light but cause all the colours together disperses it into white so we don’t see the colours seprarated

Question 20

Properties of electro magnetic radiation

Answer 20

Carries energy
Travel at the speed of light
Invisible