Top answers

Outline the structure of the alpha and beta particle and give their overall charge and a material which it cannot pass through.

Alpha - it is composed of 2 protons and 2 neutrons. It has an identical structure to a helium nucleus (an atom with no orbiting electrons). It has an over charge of +2. It cannot pass though a sheet of paper...
LM
Answered by Liam M. • Physics tutor
6578 Views

Which unit is equivalent to J kg^-1? a) m s^-1 b) m s^-2 c) m^2 s^-1 d) m^2 s^-2

When working out unit equivalences the most straightforward approach is to use formulas (often in the data booklet) to help reach a correct answer. We start by looking at Joules; knowing a Joule is a unit of...
SK
Answered by Samuel K. • Physics tutor
29608 Views

What are the differences between microwaves and radio waves? How does this effect what we use them for?

Microwaves and radio waves are both used for communication purposes. Microwaves have a higher frequency, and therefore a smaller wavelength. Because of this, microwaves can travel through the Earth's atmosph...
MR
Answered by Madeleine R. • Physics tutor
23331 Views

A tennis ball is hit over a net with a speed of 45ms^-1 and has a mass of 30g. Calculate the kinetic energy of tennis ball.

K=0.5 mv^2 K=0.5 0.03*(45^2) K=30.4J
LM
Answered by Liam M. • Physics tutor
4010 Views

What is the amplitude and period of y=3sin(5x)?

Amplitude of a periodic function is the maximum height it reaches above the centre line (or the lowest). This expressed in the equation as '3'. If the 3 was not there, then the sin wave would have an amplitu...
MR
Answered by Madeleine R. • Maths tutor
7221 Views