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The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 25.2 m/s at an angle of 59.5° above the ground, what is the "hang time?"
steam enters a turbine operaing at steady state at 700of and 450 psi and leaves as a saturated vapor at 1.2 psi. the
a spool of thin wire pivots on a frictionless shaft. the wire is pulled by a hanging mass m of 1.30 kg. calculate the
A rocket is launched from the ground with an initial speed of 30 m/s at an angle of 40 degrees with respect to the horizontal. How far down range will the rocket have traveled
a steel bar 10cm long is welded end to end with a copper bar 20cm long. each bar has the same cross sectional area on
When a parachute opens, the air exerts a large drag force on it.This upward force is initially greater than the weight of the skydiver and, thus, slows him down. Suppose the weight of the skydiver is 902 N and the drag force has amagnitude of 1030..
A copper wire is stretched uniformly (maintaining constantdensity and resistivity) so that it is ten times its originallength (but of the same volume). by what factor is its resistance changed
An 83 kg fullback moving east with a speed of 5.4 m/s is tackled by a 96 kg opponent running west at 3.8 m/s, find the velocity of the players immediately after the tackle
A suction cup works by virtue of a vacuum that is created within the cup. When the cup is pressed against a flat surface, most of the air is forced out, what is the pressure inside the suction cup
An electric dipole of dipole moment = (5 × 10-10 C.m) is placed in an electric field = (2 × 106 N/C) +(2 × 106 N/C)
A pendulum clock has an aluminum pendulum exactly 1.0 m long when the clock is calibrated perfectly. By how much is it off at the end of one day
A 80 g, 33-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing by its center. A 11 g ball of clay traveling horizontally at 2.5 m/s hits and sticks to the very bottom tip of the rod.
A baseball is thrown horizontally from from a height of 44.10 mabove ground with a speed of 33.5 m/s. Where is the ballafter 3.00 s have elapsed?
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