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Why do gravitational fields around point masses obey an inverse square law?

We can approach this question using the idea of flux lines. First we consider a sphere with a constant density of flux lines at its surface, as is the case for a point mass. These flux lines all point rad...

Answered by James C. Physics tutor
1166 Views

Can you explain the difference between a real and a virtual image?

The ways in which these two things are experienced in real life is very different - you see a virtual image when you look through a lens or at a mirror, because light is coming at you as if it were coming...

Answered by Dan G. Physics tutor
4460 Views

What led to the Plum Pudding model being replaced by Rutherford's nuclear model of the atom? (6 marks)

The Plum Pudding model states that charge and mass is spread throughout the atom. An idea that electrons are spread within a mass of positive charge.Rutherford carried out an experiment where he fired hig...

Answered by Rachna P. Physics tutor
17069 Views

What is the quark composition of a proton?

UUD, 2 up quarks and 1 down quark

Answered by Shivani K. Physics tutor
1580 Views

A baseball player strikes a ball with an initial velocity of 43ms^-1 at an angle of 32° to the horizontal. How far does the ball travel horizontally in 4 seconds?

Since the Initial velocity has a direction that is 32° to the horizontal we can split the velocity into it's components. The horizontal component of the velocity is vx = 43cos(32) (m/s). Since ...

Answered by Jack L. Physics tutor
1447 Views

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