Physics, 07.09.2019 00:20 saintsfan2004
Atennis pro throws a tennis ball at a speed of 204 km/hr. a) the tennis racquet contacts the 0.057 kg ball for 0.25 s, therefore what is the average force on the ball?
b) the ball doesn't get slowed down by drag or friction, and the opponent returns the ball at a speed of 80 km/hr. assuming a contact time of 0.25 s, what average force is applied to the ball by the opponent’s racquet?
Answers: 2
Physics, 22.06.2019 08:50, babas97
The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions
Answers: 3
Physics, 22.06.2019 15:00, ttorres013
Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants
Answers: 2
Atennis pro throws a tennis ball at a speed of 204 km/hr. a) the tennis racquet contacts the 0.057 k...
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