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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
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What is the difference between a scalar and a vector quantity?

A scalar quantity has magnitude only - for example distance.A vector has magnitude and direction - for example gravity (acceleration towards the centre of Earth).
EW
Answered by Emma W. • Physics tutor
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Explain the difference between forced vibration and resonance in an oscillating object.

Forced vibration: The object oscillating will vibrate upwards and downwards with the s ame frequency the driving oscillation is at. The amplitude of the vibration increases as the frequency decreases and the...
MP
Answered by Matthew P. • Physics tutor
29773 Views

How can an object be accelerating if it does not change in speed?

Speed is a scalar quantity, meaning that it only has a magnitude. Acceleration is a vector quantity, meaning that it has a magnitude and a direction. Velocity is the vector quantity equivalent of speed, as i...
CC
Answered by Chantelle C. • Physics tutor
13798 Views

What is the difference between speed and velocity?

The difference is a bit subtle. Velocity is speed in a particular direction. So, for example, a car travelling at 50 miles per hour round a bend is travelling at constant speed. Its direction is changing, ho...
JK
Answered by Jan K. • Physics tutor
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