A cyclist is standing still at the top of the hill and begins to coast down the hill. The mass of the cyclist and bike is 64kg. The cyclist gravitational potential energy is converted into kinetic energy with an efficiency of 48%. What is her speed when she reaches a point that is a vertical distance 12 m lower than the point at which she started? Show all work
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Physics, 22.06.2019 15:00, deonnaturner68p7hz7y
What sort of waves exhibit the doppler effect?
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Physics, 22.06.2019 16:40, Crxymia
Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
Answers: 3
Physics, 23.06.2019 02:30, lmcginnis2003
Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excesselectrons is typical. what is the magnitude of the electric forceon a protein with this charge in a 1500 n/c electric field?
Answers: 3
A cyclist is standing still at the top of the hill and begins to coast down the hill. The mass of th...
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