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A parachute dropped from a 30 meter-high cliff falls with a constant velocity of 1.5 meters per second. Twenty-two seconds later a stone is dropped from the cliff.
How long does it take for the stone to hit the ground?
Imagine that we add 250 J of thermal energy to 1 liter (L)(1000cm^3) of air initially at room temperature and normal pressure. By how much does its pressure increase
An ideal transformer has 255 loops in its primary coil and 125 loops in its secondary coil. what is the rms secondary voltage
A 3-ft-diameter semicircular channel made of unfinished concrete is to transport water to a distance of 1-m uniformly. determine the minimum elevation difference across the channel
Two cars, A and B, travel in the same direction on a straight section of highway. A has a speed of 72.0 km/h, What is the speed of B relative to A
An aquarium contains a 5 - cm layer of water ( n = 1.333) floating on top of carbon tetrachloride ( n = 1.461) what is the angle of refraction into the air
Find the minimum volume of concrete (y = 23.6 kN/m3) needed to keep the gate (1 m wide) in a closed position; l = 2 m. Note the hinge at the bottom of the gate. Explain briefly.
A 0.1 kg hockey puck is moving forward along the ice at 5 m/s just before it is hit by a player's hockey stick. find the linear impulse applied by the hockey stick to the puck
A 139 x 139 timber is used as a short foundation post. It must support a load of 42 kN. Determine the average axial stress in the post
Find the pressure at pump discharge, rate of flow of a pump, energy required by the pump, and size of the pump motor.
Two 29.0%u2212cm -focal-length converging lenses are placed 14.0cm apart. An object is placed 39.0cm in front of one lens. Where will the final image formed by the second lens be located
The electric field 25cm from a long wire carrying a uniform line charge density is 1.8kN/C. What will be the field strength 37cm from the wire
An AC generator has an output rms voltage of 58 V at a frequency of 76 Hz. If the generator is connected across a 30 mH inductor, find the inductive reactance
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