Top answers

Physics
A Level

What is the standard model?

The standard model is a 'catalogue' of subatomic particles (the smallest building blocks of everything in the universe). It categorises these subatomic particles based on their properties and has pred...

SL
Answered by Scott L. Physics tutor
3565 Views

What is the Centripetal force, and how does it keep objects in circular motion?

The Centripetal Force is not a new force which begins to act on an object as it moves in a circle. It is in fact the result of an imbalance of the forces acting on an object i.e the net f...

SB
Answered by Shaurya B. Physics tutor
11915 Views

Uranium -238 has a half life of 4.5 billion years. How long will it take a 2g sample of U-238 to contain just 0.4g of U-238?

 

RE
13650 Views

What is escape velocity?

This is the minimum initial velocity required to move from a point to infinity in a gravitational field.

Infinity is defined to have...

AP
Answered by Ashkan P. Physics tutor
7551 Views

Derive the escape velocity from the surface of a planet with radius, r, and mass, M.

This question is about converting kinetic energy into gravitational potential energy. Escape velocity is the speed required to leave the gravitational field of a mass, in this case it's a planet. In o...

TR
Answered by Thomas R. Physics tutor
18991 Views

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