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A dynamite blast at a quarry launches a rock straight upward, and 2.3 s later it is rising at a rate of 18 m/s. Assuming air resistance has no effect on the rock, calculate its speed
(a) at launch and
(b) 5.3 s after launch.
An unmarked police car, travelling a constant 94 km/h, is passed by the speeder travelling 153 km/h. precisely 0.70 s after the speeder passes, policeman steps on the accelerator. If the police car's acceleration is 2.30 m/s^2, how much time elapses ..
Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 547m in 221s.
A standing wave is created on a string of length 1.0 m and fixed at both ends. What is the wavelength of the third harmonic
The donor paid gift tax of $14,000 on the transfer. If Laura later sells the property for $110,000, illustrate what is her recognized gain or loss?
What is the piston height if the temperature is 30C. How far apart are the plates if there's air between them.
make use of the force equation of equilibrium with torques to compute around the second pivot pt, fine the women's position when the beam is about to tip.
What is the y component (in Newtons) of F
The classroom temperature is 20 C. The relative humidity is 60%. What is the total humidity (kg of H2O vapor) in the room if its volume is 200 m3.
A boy shoots a BB gun horizontally at a target 15 m away. The gun is aimed directly at the center of the target, but the small metal BB hits 56 cm lower. avoid any air resistance, what was the initial speed of the BB.
A tank of water 3.0 m deep sits on a table 1m tall. A hole is located 2m from the bottom of the tank. Water flows out of hole and strikes the ground. Where does it strike the ground? Suppose incompressible, non viscous flow.
A tennis player receives a shot with the ball of mass 0.060kg travelling horizontally at v=43 m/s and returns the shot with the ball travelling horizontally at 60.00 m/s in the opposite direction.
A child playing in a swimming pool realizes that it is easy to push a small inflated ball under the surface of the water while a large ball requires a lot of force
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