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A world-class sprinter accelerates to his maximum speed in 4.0s. He then maintains this speed for the remainder of a 100m race, finishing with a total time of 9.1s.
(a) What is the runner's average acceleration during the first 4.0s?
(b) What is is average acceleration during the last 5.1s?
(c) What is his average acceleration for the entire race?
(d) Explain why your answer to part (c) is not the average of the answers to parts (a) and (b).
If a third charge, of 5, is now placed at the point = 3.00, = 4.00 find the components of the total force exerted on this charge by other two charges.
Find the peak magnetic field in an electromagnetic wave whose peak electric field is 200N/C
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Photons of wavelength 530 nm are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc, compute the work function of the metal
A coil of 150 turns of wire is in the form of a circle, carries a current of 63 mA, and sits in the center of a dipole magnet, What is the radius of the coils
Find the x and y components of vector v = (8.0 cm/s, -x direction) (answer should be in cm/s), Find the x and y components of vector d = (4.0 km, 33 degress left of the + y axis)
Assuming that the bricks are lifted with constant speed, illustrate what is the minimum power the motor must produce?
Calculate each star's speed, and state whether it is moving toward or away from us.
A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the base of the building. Ignore air resistance. (a) How long is the ball in the air?
A parallel combination of a 1.11-?F capacitor and a 2.89-?F one is connected in series to a 4.65-?F capacitor. compute the charge of each capacitor
Find the coefficient of friction between ax and grindstone.Two negative point charges are separated by 20 rm cm and feel a mutual repulsive force of 3.35 mu N. The charge of one is three times that of the other. How much charge does each have.
Compute magnitude and direction of magnetic field produced by the moving belt at a point just above its surface .
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