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Give an example of 3 different types of radiation stating their make up, penetration and ionising effect.

alpha - helium nucleus - least penetrating - most ionising

beta - electron or positron - second most penetrating - second most ionising

gamma - photon - most penetrating - least ionising

Answered by Mark S. • Physics tutor

1658 Views

Determine a vector expression for the position of a particle whose velocity is (3t^2 - 8)i + 5j m/s.

r(t) = [integral] v(t) dt

= (t^3 - 8t + C)i + (5t + C)j m

Answered by Matteo T. • Physics tutor

1777 Views

Find, using integration, the work done in compressing a spring by a distance x.

[integral from 0 to x']dW= [integral from 0 to x'] F(x') dx'

=[integral from 0 to x']kx' dx'

=1/2k

Answered by Matteo T. • Physics tutor

3622 Views

Why does magnetic field do no work on an electric charge?

There is a qualitative and a quantitative way to show that the magnetic field does no work on electric charges. The qualitative description requires a picture; essentially, one looks at the circular orbit...

Answered by Jergus S. • Physics tutor

2162 Views

How might you use sound waves to smash a glass? What are other examples of resonance in everyday life?

The natural frequency of a glass can be found by tapping it or making it 'sing' (running a wet finger around the top of the glass till it sings a note. If you emit sound waves at this frequency in the dir...

Answered by Josie R. • Physics tutor

2098 Views