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A speeder is pulling directly away and increasing his distance from a police car that is moving at 25.1 m/s with respect to the ground.The radar gun in the police car emits an electro magnetic wave witha frequency of 7.16E+9 Hz. The wave reflects from the speeder's carand returns to the police car, where its frequency is measured tobe 322 Hz less than the emitted frequency. Calculate the speeder's speed with respect to the ground.
german physicist werner heisenberg related the uncertainity of an objects position triangle x to the uncertainity in
A uniform cubical crate of side length 1.7 m rests on the floor with one edge against a very small, fixed obstruction. What is the weight of the crate
A 12.0-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 12.2 m/s, determine the rotational kinetic energy about its center of gravity
A cloud mass moving across the ocean at an altitude of 2000 m encounters a coastal mountain range. As it rises to a height of 3500 m to pass over the mountains, it undergoes an adiabatic expansion.
an 18-year-old runner can complete a 10.0 km course with an average speed of 4.39 ms. a 50-year old runner can cover
an air column in a glass tube is open at one end and closed at the other by a movable piston. the air in the tube is
A stone is thrown horizontally outward from the top of a bridge. The stone is released 19.6 m above the street below. determine the total time that the stone is in the air
q1. a stone thrown upward from the top of a 108 ft cliff at 132 ftsec eventually falls to the beach below. for this
In the afternoon, the decibel level of a busy street is95 dB with 100 cars passing at a givenpoint every minute. What is the late night decibel level
A drag racer starts from rest and accelerates for 12.3 s with a constant acceleration until it has travelled 400 m. What is the stopping distance for the drag racer
two force vectors act on an object i 60.0 newton at 45.0deg north of east and ii 25.0 newton at 30.0deg south of east.
a car zooms around a curve radius 20 m at a speed of 20 ms.a. what is the centripetal acceleration of the car?b. how
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