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Show that the radius of an orbit may be expressed as follows: R^3=((GM)/4*pi^2)T^2

Start with Newton's Law of Gravitation: F=(GMm)/R^2 (1) Since orbits are assumed to be circular recall the equation for centripetal force: F=(mv^2)/R (2) We can now equate these 2 forces due to them being ac...
LM
Answered by Liam M. • Physics tutor
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Define Simple Harmonic Motion

The acceleration or unbalanced force is proportional to the displacement of the object from its equilibrium position and acts in the opposite direction Mathematically, this may be expressed as a=-w^2y where ...
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Answered by Liam M. • Physics tutor
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Define electric current

Electric current is a measure of the rate of flow of charges. What this means is how many charges are flowing in a circuit in a certain time period. Mathematically this is expressed as I=Q/t where I is for c...
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Answered by Liam M. • Physics tutor
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What are the assumptions made when calculating values regarding an Ideal Gas?

The factors that are assumed are: -The volume of particles is negligable. -The electrostatic forces betwen the particles are negligable. -All collisions between particles and the walls of the container are e...
NS
Answered by Nathan S. • Physics tutor
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Use band theory to explain the changes in the resistance of an intrinsic semiconductor as temper changes.

At low temperatures(0K), the conduction band is empty while the valence band if filled. As temperature increases, the electrons gain energy to go into the conduction band and leave positive holes in the vale...
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Answered by Kutlwano G. • Physics tutor
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