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What is the total energy of a spaceship of mass m, orbiting a planet of mass M in a circular orbit with radius r? The ship and the planet are taken to be an isolated system.

In the non-inertial frame of reference of the spaceship, a centrifugal and a gravitational force acts on the spaceship. If its mass is m and the positive direction is radially outwards, we have: F G = -GmM/r...
ID
Answered by Ivan D. • Physics tutor
3347 Views

What is the difference between civil and criminal law?

The main difference between them is: the criminal law deals with wrongs committed against the state, whereas civil law deals with disputes between private individuals (or companies etc). This affects the aim...
ND
Answered by Nathan D. • Law tutor
6033 Views

What is the behavioural treatment for phobias?

The behavioural treatment for phobias consists of two forms of therapy, which both aim to break the link between the phobia and the feared resonse. The first type is flooding; this is a quick and intense ses...
RI
3577 Views

Typically, texts about husbands and wives present marriage from a male point of view.’

Come, come, you froward and unable worms, My mind hath been as big as one of yours, My heart as great, my reason haply more, To bandy word for word and frown for frown. But now I see our lances are but straw...
BG
5230 Views

Why do skydivers have a terminal velocity?

People and things keep doing the same thing until a force makes them change according to Newton. When a skydiver jumps out of a plane they have zero velocity downwards but the force of gravity is pulling the...
PF
Answered by Peter F. • Physics tutor
2882 Views