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Physics
GCSE

How does conduction work in metals?

A metal has free electrons, so when it is heated these electrons gain kinetic energy, meaning they move faster. As a result, these free electrons will collide with other electrons or ions, transferring en...

JC
Answered by Josh C. • Physics tutor
6942 Views

A rocket travels at 500m/s two minutes after its take-off. If it was initially stationary, calculate its acceleration. If the rocket has a mass of 1800kg, what force is required to give it an acceleration of 2m/s^2?

a) Acceleration is the rate of change of velocity of an object

In this case, the equation that we will use to calculate it is 

a = (v - u )/ t

DS
Answered by Dhrushee S. • Physics tutor
4981 Views

Why do lasers produce an intense coherent beam of light?

Lasers produce an intense coherent beam of light because the waves have the same frequency, are in phase with each other and have a low divergence.

LB
Answered by Lily B. • Physics tutor
5152 Views

A note was played on a a keyboard. The frequency of the note was 440 Hz. (a) What does a frequency of 440 Hz mean? (b) The sound waves produced by the keyboard travel at a speed of 340 m/s. Calculate the wavelength of the note.

(a) A frequency of 440 Hz means that a single trough and peak of the sound wave oscillates 440 times per second or equally that 440 sound waves are produced by the keyboard per second (This is because ...

IW
Answered by Ifan W. • Physics tutor
38577 Views

A bullet is fired horizontally from a rifle 1.5m from the ground at 430m/s. How far does it travel and for how long does it travel before it hits the ground?

A bullet is fired horizontally from a rifle 1.5m from the ground at 430m/s. How far does it travel and for how long does it travel before it hits the ground?
Assuming that air re...

TA
Answered by Tim A. • Physics tutor
101545 Views

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