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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
2681 Views

A pan is on the stove ready to boil some peas. The water inside it is heated by convection, and as you watch you can see a convection current occur. Explain what convection is and why convection currents happen.

Part A) Convection occurs in liquids. In this process, more energetic particles move from warmer regions to cooler ones and take their energy with them. A convection current happens because when a fluid is h...
KP
Answered by Kiaya P. • Physics tutor
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Describe the process of nuclear fission is induced

Single and slow moving neutron strikes a uranium nucleus. This results in the nucleus to be large and unstable. The unstable nucleus splits into two unequal nuclei and some fast neutrons. The neutrons can in...
SS
Answered by Sudip S. • Physics tutor
2990 Views

How does a potential divider work?

I've always thought that physics is best explained through analogies, and so instead of two resistors we'll imagine two people (our resistors) in Yo Sushi (where plates of sushi represent our voltage). Say t...
AJ
Answered by Adi J. • Physics tutor
3733 Views

Do heavier objects fall on the ground quicker?

No. Physics can be and often is counterintuitive. Mass of an object doesn't affect the time of a fall. Different times are caused by air resistence and therefore are related to the shape. If we dropped a car...
JM
Answered by John M. • Physics tutor
3046 Views