Top answers

Describe how a capacitor works.

If you think of electrons as tennis balls being passed around by a circle of people, then a capacitor occurs when there is a gap between 2 people which is too large for the ball/electron to be passed on. Thi...
CW
Answered by Charlotte W. • Physics tutor
4745 Views

When does a pendulum bob move fastest and why?

A pendulum bob will move fastest when the mass is at its lowest point (when x=0). The reason for this is that in the pendulum system energy is transferred between kinetic and gravitational potential energy, ...
JB
Answered by James B. • Physics tutor
30196 Views

Why is the centripetal force necessary for circular motion?

The centripetal force can be thought of as the force that causes circular motion. When an object moves in a circle a force must always act on it, even when it moves at a constant speed. This is because veloc...
JB
Answered by James B. • Physics tutor
26591 Views

Explain what simple harmonic motion means?

Simple harmonic motion describes the motion of an object which has an acceleration that is directly proportional to its displacement from the equilibrium point and when the accelerations acts in the opposite...
AC
Answered by Amilah C. • Physics tutor
4008 Views

A sample of pure gold has a density of 19300 kgm^-3. If the density of a gold nucleus is 1.47x10^17Kgm^-3, discuss what this implies about the structure of the gold atom. [4 marks]

To gain all of the marks, 4 different points must be made. To begin, state what is obvious: The density of the gold nucleus is much greater than the density of the gold atom. The next step is to discuss what...
RL
Answered by Rebecca L. • Physics tutor
11500 Views