Physics

Question 1

Area under a force time graph is

Answer 1

impulse

Question 2

Area under a force displacement graph is

Answer 2

Work

Question 3

Work is equal to…

Answer 3

Fs or ΔKinetic Energy

Question 4

Stopping distance equals

Answer 4

reaction distance plus breaking distance

Question 5

s (displacement) equals

Answer 5

ut +(at^2)/2

Question 6

v^2 equals

Answer 6

u^2 +2as

Question 7

v equals

Answer 7

u + at

Question 8

v equals (only in freefall)

Answer 8

root 2gh

Question 9

A nucleon is…

Answer 9

either a proton or neutron

Question 10

the refractive index of air is…

Answer 10

1

Question 11

Half life equal

Answer 11

N =No x (1/2)^n
N-> half life
No-> number of nuclides initially
n=t/to
t-> time elapsed
->time of the half life

Question 12

magnification equals

Answer 12

m=height of image/height of object = distance of image/distance of object

->m= hi/ho= di/do

Question 13

Work equals

Answer 13

W=Fs=Ft=Δp=ΔKe=Q

Question 14

Power equals

Answer 14

W/s or VI (power connects work and circuits)

Question 15

Frequency is

Answer 15

1/T and always constant

Question 16

Period is

Answer 16

1/f or wavelenght/velocity

Question 17

Calculating refractive index is

Answer 17

n (refractive index)= c (speed fo light)/ v (speed of light inside the material investigated

Question 18

Hooke’s Law

Answer 18

the force applied to a string is proportional to its stretch

Question 19

Zeroth Law of Thermodynamics

Answer 19

if two objects in thermal equilibrium are in contact with a third object, then the third object must also be in equilibrium

Question 20

1st Law of Thermodynamics

Answer 20

Within a closed system, energy cannot be created or destroyed, but can be transferred
-Q loss = Q gain

Question 21

2nd law of thermodynamics

Answer 21

the entropy (disorder) of a system always increases

Question 22

3rd law of thermodynamics

Answer 22

entropy always reaches some constant

Question 23

Electron Volts are

Answer 23

the work required to move on electron through one volt of potential difference
used in atomic physics

Question 24

Binding Energy is

Answer 24

the amount of energy used to pull protons, neutrons and electrons together

Question 25

The strong nuclear force

Answer 25

overcomes the repulsion between protons, and binds neutrons and protons together

Question 26

the strong nuclear force is

Answer 26

the strongest force

Question 27

If a wave goes into a denser medium

Answer 27

it refracts away from the normal and moves faster
e.g a sound wave

Question 28

if a wave goes into a less dense medium

Answer 28

it refracts towards the normal and is slower