Top answers

Physics
A Level

What happens to ice when energy is supplied at a constant rate in terms of the changes in energy of the molecules?

If we start with water at 263K (ice) then the molecules are positioned in a regular lattice structure held in place by hydrogen bonds. The molecules have some vibrational energy but not much translational...

Answered by Stuart D. Physics tutor
1867 Views

State Lenz's law and hence describe and explain what happens to a magnet travelling through a metal tube

Lenz's law states that the direction of current due to emf induced by a changing magnetic flux is always such that it opposes the change that induced it.

When a magnet travels through a copper tube...

Answered by Melisande C. Physics tutor
4603 Views

What is resonance

Resonance is the effect of an external driving force which causes a system to ocsillate with a greater amplitude at certain frequencies. All objects have a natural frequency, and this specific property de...

Answered by Michalis C. Physics tutor
2279 Views

A body is moving at 70km/h and has a mass of 130kg, calculate its maximum kinetic energy.

Firstly, the speed is not given in SI units, this is modified by changing the units from km/h to m/s by the following relationship; 70km/h = (70000/3600)m/s. Once this is complete the equation for kinetic...

Answered by Joe I. Physics tutor
2271 Views

A ball is launched from ground level at 5m/s at an angle of 30 degrees above the horizontal. What is its height above ground level at the highest point in its trajectory?

STEP 1: Draw a diagram!

Remember to include all the useful information you are given in the question i.e. the initial velocity of the ball (5m/s at 30 degrees above the horizontal)...

Answered by Iestyn H. Physics tutor
5367 Views

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