WJEC A-Level Physics Unit 3 Oscillations and Nuclei overview quiz quiz

The direction of its velocity is continuously changing

Its speed is steadily increasing as it travels around the circle

It is gradually slowing down as it moves around the circular path

There is no resultant force acting on it at any point in the motion

Tangentially, in the direction of motion

Towards the centre of the circle

Away from the centre of the circle

Vertically downwards

a = v squared divided by the radius r

F = ma, force equals mass times a

a = -omega squared times x

v = u + at for constant acceleration

At the extremes of the motion, furthest from equilibrium

It is constant everywhere throughout the whole oscillation

The kinetic energy is always zero at every point in the motion

At the centre (equilibrium position)

The supplied energy increases the potential energy of the particles, breaking bonds, not their kinetic energy

No energy at all is supplied to the substance during the whole of the melting process

The specific heat capacity of the substance suddenly becomes zero at the melting point

The particles stop moving completely and become totally stationary while the substance is changing from solid to liquid

Completely independent of the temperature of the gas

Proportional to the absolute temperature

Proportional to the pressure of the gas only, not its temperature

Equal to the latent heat of vaporisation of the substance

Molecules attract each other strongly between collisions

Molecules occupy most of the volume of the container

Collisions between molecules are perfectly elastic

Molecules move only in straight vertical lines

It can be predicted exactly in advance for each individual nucleus in the sample

It only happens when the radioactive sample is strongly heated or compressed

It always produces gamma radiation in addition to alpha or beta particles

The decay rate is unaffected by temperature, pressure or chemical state

t = ln 2 divided by lambda

t = lambda times ln 2

t = lambda squared

t = 1 divided by lambda squared

Hydrogen-1

Iron-56

Uranium-235

Helium-4

Both destroy mass completely without producing any change in the total energy

Both can only ever occur inside the extreme conditions found at the core of stars

Both move nucleons to a configuration with a higher binding energy per nucleon

Both reduce the binding energy per nucleon of the nuclei taking part in them