Motion and Forces
Energy
Waves and EM
Radiation
100

How far has a student travelled if their speed changed from 10m/s to 20m/s at an acceleration of 3 m/s2? (include units)

x = (v^2-u^2)/(2*a)

50 m

100

List 5 different energy stores

Nuclear, Tension, thermal, chemical, gravitational, kinetic

100

Order the wavelengths from shortest wavelength to longest.

Visible light, microwave, x-ray, ultraviolet, infrared, gamma, radio

gamma, x-ray, UV, visible, IR, micro, radio

100

List 2 sources of background radiation and the instrument we use to detect them

Geiger-muller tube

Any from: rocks, Sun, buildings, food, nuclear waste, power stations medical, water, radon, cosmic rays

200

If a student is walking around in a circle at a constant pace, what happens to their speed and velocity?

Their speed stays the same while their velocity constantly changes.

200

State the energy stores and transfers involved in turning on an electric fan.

chemical > electric > kinetic (Also thermal and sound)

200

State a use and a danger of gamma rays.

Used in medicine/sterilizing.

Can cause death or cancer.

200

How does an atom release light waves?

Electrons are excited to higher shells. When they return to their normal orbit, they release EM waves.

300

Which of the following graphs represents a car travelling on a motorway with cruise control on.


top  middle or bottom right

300

Use the Sankey diagram to describe why the CFL has a higher energy rating. Be specific.

4 times as much usable energy.

300

The distance between the Earth and Sun is 1.5x1011m.

Light takes 500 s to travel from the Sun to the Earth

The wavelength of red light is 670 nm.

Calculate the frequency of red light.

4.5x1014 Hz

300

Fill in the blanks

99, 43

400

An ice skater pushes harder with his leg muscle, then he begins to move faster. Which law? and why?

2nd, because an increase in force increases acceleration

400

Explain why an insulated thermos can both keep cold drinks cold and hot drinks hot.

Creates a system which minimizes heat transfer (either way)

400

Explain how a radiowave is created

Oscillation of electrons in a wire produces radiowaves

400

What is the structure of an alpha particle?

Helium nucleus. 2 protons and 2 neutrons

500

What is meant by the term 'inelastic collision' in terms of energy and momentum?

KE is lost, momentum is conserved.

500

Calculate the height of a ball if it is has a velocity of 10 m/s just before impact.

G= 10m/s2

KE=1/2mv2

GPE=mgh

5 m

500

When white light crosses the boundary between air and glass, it can split into the colours of the spectrum. Explain, in terms of speed, why the light behaves like this.

Colours have different wavelengths. Different wavelengths travel at different speeds and so refract by different amounts.

500

Carbon-14 is a radioactive isotope with a half-life of 5700 years. The number of C-14 atoms in a piece of wood is found to have decreased from 1'000'000 to 125'000. Determine the age of the wood.

17100 years