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A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground he comes to rest in a time of 0.040 s. The average force on the ground is +18,000 N. (Upward is + direction). From what height did the student fall? (Neglect air resistance).
A cell membrane is composed of lipid molecules and is approximately 18 nm thick, what is the approximate capacitance of a spherical cell that has a diameter of 20 m?
A fan is spinning at 900 rpm. When its motor is turned off it makes 75 rev before coming to a stop. If the work down by dissipative forces is 44.4J, Find the moment of Inertia of the fan and the torque due to dissipative forces.
A 250 g block is dropped onto a relaxed vertical spring that has a spring constant of k = 3.5 N/cm, What is the speed of the block just before it hits the spring
An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 103 km and with a period of 47.0 h. The asteroid is roughly spherical (unusual for such a small body) with a radius of 24.9 km.
If the final temperature of the system is 22.0?C, what is the mass m of the water that was initially at 80.0 ?C
A dog and her handler are at rest and are facing each other at a distance 40.0meters. Find the (common) position where the dog and the handler meet
Water flows though a 20mm diameter pipe at 3L/min and static pressure of 100mmHG. What is the wall stress of the pipe. The pipe is 1.5mm thick
A small circular loop of area 2.00cm^2 is placed in the plane of, and concentric with, a large circular loop of radius 1.00m. What emf is induced in the smaller loop at t=0.500s
What was the take-off speed? If this speed were increased by just 5.0%, explain how much longer would the jump be?
The maximum current in a particular type of solenoid (used in strong B field research) can be as large as 4 kA. what is the maximum size of the magnetic field produced inside the solenoid
A horizontal beam of electrons initially moving at 3.4 107 m/s is deflected vertically by the vertical electric field between oppositely charged parallel plates.
To stretch a certain spring by 2.90cm from its equilibrium position requires 7.50J of work. What is the maximum force required to stretch it by that distance
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