Past Paper

Question 1

On a graph showing count rate and time for the decay of a sample, why should you not expect the points to lie exactly on the lines of best fit?

Answer 1

Decay is random

Question 2

How should you get from kg to newtons?

Answer 2

Times by 10 (correct is 9.81)

Question 3

The load has a mass of 400g and gains 3.2 joules in its gravitational store when lifted. What amount of useful work done does the motor do?

Answer 3

3.2j

Question 4

How should you allow for background radiation when doing an experiment?

Answer 4

Use a GM tube
Remove source from the experiment
Record the count rate

Question 5

What is the definition of specific heat capacity?

Answer 5

Energy required per gram of mass to change per unit temperature

Question 7

How does a main sequence star evolve into a supernova?

Answer 7

Hydrogen fusion stops
So the core collapses
Which restarts fusion
It will then form into a red supergiant
Fusion of the heavier elements stops
This will then explode