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How are X-rays created?

High energy electrons are fired at a target. When the electrons interact with the atoms in the target two things can happen. The first process is called breaking radiation and occurs when the electron is att...
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Answered by Charlotte K. • Physics tutor
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What is the minimum height of a hill, so a ball of mass m falling from it can go through a loop of radius R?

There is only one requirement for the ball to go through the loop. Its energy must be such that the centrifugal force experienced by the ball when it is at the peak of the loop is greater than gravity pullin...
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Answered by Gabriel P. • Physics tutor
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Derive the Drift Velocity Equation

(The drift velocity is the average velocity of a charge carrier due to an electric field)Consider a conductor with length l and cross sectional area A There are n electrons per unit volume (m 3 ) moving thro...
FM
Answered by Francois M. • Physics tutor
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Describe simple harmonic motion (SHM). Sketch a displacement-time graph for a particle undergoing SHM and the corresponding velocity-time and acceleration-time graphs. Use these graphs to describe the relationship between accleration and displacment.

Simple harmonic motion is periodic motion in which a restoring force acts in the opposite direction to that of displacement and is directly proportional to the displacement.The displacement-time graph for SH...
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Answered by David G. • Physics tutor
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What is the definition of a moment?

A moment is the product of force and the perpendicular distance from the pivot to the line of action of the force.
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Answered by Odin G. • Physics tutor
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