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A transmitter from a researcher's boat sends a signal to the seabed of waves speed 300m/s and it takes 5 seconds for the signal to return back to the boat. Calculate the depth of the sea there.

distance=speed*time distance=300*5 =1500 1500/2 (as signal travels back and forth)=750m
TA
Answered by Tani A. • Physics tutor
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Calculate the kinetic energy of a proton moving at 95% of the speed of light. (c = 3x10^8 m/s, m_p = 1.67x10^-27 kg) [4 marks]

KE = 0.5mv 2 [1] v = 3x10 8 * 0.95 = 2.85x10 8 [1] KE = 0.5 * 1.67x10 -27 * (2.85x10 8 ) 2 [1] KE = 6.782 x10 -11 J [1]
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Answered by Tom F. • Physics tutor
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What is a Sankey diagram and how do we use it?

A Sankey Diagram can be used to represent the energy usage and efficiency of anything. There are 3 main parts of Sankey diagram, the start (left side), the arrow heads that peel off facing upwards or downwar...
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Answered by Alex W. • Physics tutor
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Why protons held together in the nucleus?

Alike atoms, protons are also made of smaller particles - mesons. When protons are at very close distance mesons are bonded together by the Strong Nuclear Force, which is stronger than the Electric Force, bu...
ED
Answered by Eugeniu D. • Physics tutor
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What is the difference between plastic and elastic collision?

An elastic collision is a collision where objects will bounce after they hit each other. For example balls in a pool game bounce after heating each other. For an elastic collision, Mechanical Energy Kinetic ...
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Answered by Eugeniu D. • Physics tutor
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