Energy

Question 1

What is a system

Answer 1

An object or group of objects

Question 2

What can the kinetic energy of a moving object be calculated by What equation

Answer 2

Kinetic energy=
0.5 x mass (speed)2

Question 3

What is kinetic energy written as

Answer 3

Ek

Question 4

What is kinetic energy measure in

Answer 4

Joules (J)

Question 5

What is mass written as

Answer 5

M

Question 6

What is mass measure in

Answer 6

Kilograms (kg)

Question 7

What is speed written as

Answer 7

V

Question 8

What is speed measure in

Answer 8

Meters per sec (M/s)

Question 9

What is elastic potential energy written as

Answer 9

Ee

Question 10

What is elastic potential energy measure in

Answer 10

Joules (J)

Question 11

What is spring constant written in

Answer 11

K

Question 12

What is spring constant measure in

Answer 12

Newtons per metre (n/m)

Question 13

What is extention written as

Answer 13

E

Question 14

What is extention measure as

Answer 14

Metres (m)

Question 15

What is the gravitational potential energy equation

Answer 15

G.p.e =
mass x gravitational field strength x height

Question 16

What is gravitational potential energy written as

Answer 16

Ep

Question 17

What is gravitational potential energy measured In

Answer 17

Joules (J)

Question 18

What do gravitational field strength written as

Answer 18

G

Question 19

What is gravitational field strength measured in

Answer 19

Newtons per kilogram (n/kg)

Question 20

What is height written as

Answer 20

H

Question 21

What is thermal energy weritten as

Answer 21

^E

Question 22

What thermal energy measure in

Answer 22

Joules (J)

Question 23

What is specific heat capacity written as

Answer 23

C

Question 24

What is specific heat capacity measure in

Answer 24

Joules per kilogram per degree celcius (j/kg)•C

Question 25

What is ten specific heat capacity of a substance

Answer 25

The amount of energy required to raise the temp of one kilogram of the substance by one degree celcius

Question 26

What is power defined as

Answer 26

The rate at which energy is transferred or the rate at which work is done

Question 27

What is power written as

Answer 27

P

Question 28

What is power measured in

Answer 28

Watts (w)

Question 29

What is energy transferred written as

Answer 29

E

Question 30

What’s is energy transferred measured in

Answer 30

Joules (J)

Question 31

What is time written as

Answer 31

T

Question 32

What is time measured in

Answer 32

Seconds s

Question 33

What is work done written as

Answer 33

W

Question 34

What is work done measured in

Answer 34

Joules (J)

Question 35

What does and energy transfer of one joule also equal to

Answer 35

1 power of watt

Question 36

What can happen to energy and what can’t

Answer 36

It can be transferred usefully , stored or dissipated but it can’t be created nor distriyed

Question 37

The higher the thermal conductivity of a material the higher the what

Answer 37

The higher the rate of energy transfer by conduction across the material

Question 38

What are the main energy resources available for use on earth

Answer 38

Fossil fuels, nuclear fuel ,biofuel ,wind ,hydro-electricity, geothermal, tides, sun and water waves

Question 39

Define a renewable resource

Answer 39

A reasource that can be replenished as it’s being used

Question 40

What are the used of energy

Answer 40

Transport ,electricity generation and heating