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Describe the kinetic model composition of a solid

Tightly packed particles vibrating about a fixed point.

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State Lenz's law and hence describe and explain what happens to a magnet travelling through a metal tube

Lenz's law states that the direction of current due to emf induced by a changing magnetic flux is always such that it opposes the change that induced it.

When a magnet travels through a copper tube...

Answered by Melisande C. • Physics tutor

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It takes 1.8s to drop a ball of a bridge. How high is the bridge and what speed is reached?

t= 1.8s

a=-9.81ms^-²

v=u+at

v= -9.81 x 1.8 =17.658 m/s

s= ut + 1/2 at²(as u is 0 s= 1/2 at²)

s = 1/2 x 9.81 x 1.8²

Answered by Gabriella L. • Physics tutor

2537 Views

What is the difference between velocity and speed?

Speed is a scalar quantity, meaning it gives us information for only the magnitude, how large a quantity is. Velocity is a vector quantiy, and this means it gives us both magnitude and direction. Both spe...

Answered by Michalis C. • Physics tutor

2724 Views

What is resonance

Resonance is the effect of an external driving force which causes a system to ocsillate with a greater amplitude at certain frequencies. All objects have a natural frequency, and this specific property de...

Answered by Michalis C. • Physics tutor

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