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Describe how the strong nuclear force between two nucleons varies the distance between the 2 nucleons.

The strong force between two nucleons is initially repulsive. However at a distance of around 1 fm the force crosses over and becomes repulsive. The strong nuclear force is only seen to act over short distan...
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Two cars start at point A. Car 1 moves in a direction at 5 m/s. After 10 seconds car 2 accelerates in the same direction as car 1 at 2m/s^2. At what time after car 1 starts moving and distance from A does car 2 pass car 1?

-First find an equation for the distance travel by car 1. In this case s=5t+50 -Next find an equation for the distance traveled by car 2. Using suvat since constant acceleration (1/2)at^2+ut=s. Substitute kn...
TD
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Define electrical resistance

It's often best to use an equation when asked for definitions like this. In this case, use Ohm's law: R = V/I (where V is potential difference, I is current and R is resistance, measured in ohms)
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Answered by Maria F. • Physics tutor
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Describe and explain the photoelectric effect (6 marks)

In the photoelectric effect, the electromagnetic wave is thought to exist as quanta (discrete packets) of energy, called photons. When an EM wave is directed at a metal surface, the photons are absorbed by t...
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Answered by Maria F. • Physics tutor
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Give the unit of energy, using only the base SI units kg, m and s.

If asked to give the units of some complicated quantity in more basic units, try to think of a physical equation you know that relates the complicated quantity (i.e. energy, units J) to other quantities. In ...
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Answered by Sjoerd B. • Physics tutor
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