Physics year 10 mocks

Question 1

Scalars

Answer 1

quantities that are fully described by a magnitude (or numerical value) alone

Question 2

Vector

Answer 2

quantities that are fully described by both a magnitude and a direction

Question 3

distance

Answer 3

is a scalar quantity that refers to how much ground an object has covered during its movement

Question 4

displacement

Answer 4

is a vector quantity that refers to how far out of place an object is. it is the objects overall change in position

Question 5

speed

Answer 5

is a scalar quantity that refers to how fast an object is moving (m/s)

Question 6

velocity

Answer 6

a vector quantity that refers to the rate at which an object changes its position

Question 7

Average velocity formula

Answer 7

change in position / time travelled

Question 8

Acceleration formula

Answer 8

acceleration(m/s2)=(final velocity-velocity at the start(m/s) / time(s)

Question 9

Mass and weight formula

Answer 9

weight(newtons)=mass(kg) x gravity(newton per kilo, N/kg)

Question 10

earths gravity

Answer 10

9.8N/kg

Question 11

Newton’s 1st law

Answer 11

an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force (air resistance)

Question 12

Force

Answer 12

a force is a push or pull on an object

Question 13

force formula

Answer 13

force=mass x acceleration

Question 14

momentum formula

Answer 14

momentum(kgm/s)=mass(kg) x velocity(m/s)

Question 15

Newton’s second law of motion

Answer 15

an object’s acceleration depend on the strength of the unbalanced force acting on it and the mass of the object

Question 16

Newton’s third law of motion

Answer 16

for every action, there is an equal and opposite reaction

Question 17

Energy types

Answer 17

thermal, kinetic, gravitational potential, chemical, sound, light, nuclear, elastic potential, electrical

Question 18

Efficiency

Answer 18

a measure of how much of the energy supplied is transferred to useful energy

Question 19

efficiency formula

Answer 19

useful energy out / total energy in x 100%

Question 20

conduction

Answer 20

vibrations get passed on

Question 21

convection

Answer 21

hot particles rise up and cold particles rush in to fill their place. Hot particles are less dense than cold particles

Question 22

radiation

Answer 22

no particles needed, electromagnetic waves, black will absorb and silver will reflect

Question 23

gravitational potential energy formula

Answer 23

mass x gravity x height(m)

Question 24

kinetic energy

Answer 24

0.5 x mass x velocity2

Question 25

what is energy measured in?

Answer 25

Joules

Question 26

non-renewable resources are:

Answer 26

coal, oil, gas, nuclear

Question 27

renewable resources are:

Answer 27

wind, tidal, solar, hydro-electric, geothermal, wave, biomass

Question 28

how does a wave transfer energy?

Answer 28

vibrations

Question 29

waves which don't use vibrations to travel are?

Answer 29

electromagnetic waves

Question 30

How do electromagnetic waves travel without the use of particles?

Answer 30

vibrations in an energy field

Question 31

frequency is?

Answer 31

the number of waves made a second (Hz)

Question 32

waves where energy is transferred perpendicular to vibrations

Answer 32

transverses

Question 33

waves where energy is transferred parallel to vibrations

Answer 33

longitudinal

Question 34

what does wave mean?

Answer 34

a wave is a way of transferring energy

Question 35

wave velocity formula

Answer 35

wave frequency(Hz) x wavelength(m)

Question 36

wave frequency formula

Answer 36

wave velocity(m/s) / wave length(m)

Question 37

wave length formula

Answer 37

wave velocity(m/s) / wave frequency(Hz)

Question 38

what is the incident angle?

Answer 38

the angle between a ray incident and the normal

Question 39

what is the refracted angle?

Answer 39

the angle between the normal and the refracted ray inside the object

Question 40

what are the 3 section of the ear called?

Answer 40

outer, middle and inner ear

Question 41

How do we hear?

Answer 41

vibrations travel down the ear canal and cause the eardrum to vibrate. These vibrations move the small bones at the back of our ear called the malleus, incus and stapes. These vibrations get passed onto the cochlea which causes little hairs inside to move. this movement of the hairs creates electrical impulses which are brain interprets as sound

Question 42

what frequencies are classed as ultrasound?

Answer 42

above 20'000Hz

Question 43

what frequencies are classed as infrasound

Answer 43

below 20Hz

Question 44

what is the frequency range of humans?

Answer 44

20 to 20'000Hz

Question 45

what can longitudinal waves pass through?

Answer 45

solids, liquids and air

Question 46

what can transverse waves pass through?

Answer 46

solids

Question 47

what is total internal reflection?

Answer 47

when a wave can't refract out of a material due to the large angle it hits the internal surface at