Energy

Question 1

What is energy

Answer 1

the ability to do work

Question 2

what are the 2 types of energy and explain them

Answer 2

ponetial - stored energy
Kinetic - movement

Question 3

types of knetic energy

Answer 3

light, heat, sound, movement and electric

Question 4

5 types of potential energy

Answer 4

stored, elastic-when pulled hair tie
gravital
Nuclear and chemical

Question 5

what is the law of conservation on energy

Answer 5

Energy can not be made of distroyed

Question 6

what are Energy trasformations. dont have to list all

Answer 6

Chemical to Thermal: When you burn a fuel like wood, gas, or coal, chemical energy stored in the fuel is transformed into thermal energy (heat) and light energy.

Electrical to Light: In an incandescent light bulb or a fluorescent tube, electrical energy is converted into light energy.

Electrical to Sound: In speakers, electrical energy is transformed into sound energy.

Potential to Kinetic: When you drop an object, gravitational potential energy is converted into kinetic energy as it falls..

Question 7

transform?

Answer 7

changes into a DIFFERENT energy

Question 8

transfer?

Answer 8

when energy goes from 1 objet to another eg heating up water

Question 9

what are the 3 types of heat transfer

Answer 9

conduction convection and radiation

Question 10

what is conduction

Answer 10

when two objects are in contact, heat ransfers from the hotter one ionto the cooler one untill they reach the same temp
eg when you hold a cold waterbottle it heats up in the place were you hand was

Question 11

what is convection

Answer 11

the transfer from heat to liquid and gas,
eg when you are bolling water the stove will make the particals rise becuse hotter = less dense and the lesser dense particals the more they will rise opposite for cool

Question 12

what is energy effenticy

Answer 12

the measure of how much input energy is converted into useful out put energy

Question 13

radiation

Answer 13

heat spreads outwards as a wave from any hot object
doesn’t require the movement of particles

Question 14

what is input energy?

Answer 14

what goes into the device or appliance

Question 15

what is useful output energy?

Answer 15

what is the needed energy of an object eg when your using a computer you need sound and light so they are useful out punt energy

Question 16

wasted energy

Answer 16

energy that is made but not needed

Question 17

how do u calculate how much useful energy is converted into useful out put energy

Answer 17

useful divided by inupt x100

Question 18

howis sound enerngy produced

what particals

Answer 18

Sound energy is the energy produced by vibrating objects that travels in the form of waves

Question 19

how does sound travel

Answer 19

it travels buy sound waves

Question 20

what type of energy is vibrating particles/ potential or kinetic

Answer 20

kinetic because it moves

Question 21

electomagnetic specturm

Answer 21

The electromagnetic spectrum is like a rainbow made of invisible light. It includes all kinds of light, from radio waves, which are like the long waves at the bottom of the rainbow, to gamma rays, which are like the short waves at the top. Each type of light has different uses, like helping us see, cook food in a microwave, or take pictures of our bones at the doctor’s office.

Question 22

what is high and low frequency

Answer 22

high=vibrating particles quickly
low=vibrating particles slower

Question 23

what is pitch

Answer 23

how high or low a sound is
(finn has a really high pitch)

Question 24

higher frencey is shorter or longer wavelength

Answer 24

shorter

Question 25

what surface absorbs sound

Answer 25

a soft surface eg if you scream into a pillow it absorbes the sound making it more quiet

Question 26

what surface makes sound echo

Answer 26

flat surface

Question 27

what surface causes dffusion

Answer 27

uneven/ rough

Question 28

which type of energy is the fastest

Answer 28

light energy because when you watch fire works u see them before you here them

Question 29

how does light move

Answer 29

Light moves in straight lines called rays. It travels very fast, bouncing off objects and into our eyes, allowing us to see.

Question 30

what is reflection

Answer 30

bounce of a surface eg when you look in a mirror your reflection bonuces of the mirrior

Question 31

what is refration

Answer 31

bending of light
As the straw enters the water, it appears to bend or break at the surface of the water.

Question 32

what is dispersion

Answer 32

Dispersion is when white light is separated into its component colors. An example is when sunlight passes through a prism and creates a rainbow of colors on a surface.