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An elevator moving upward approaches the top floor of a high rise building and begins to slow down at the rate of 2.00 m/s2.
(a) Will a passenger in the elevator feel a lighter or heavier weight during this time?
(b) Draw a free-body diagram to show all the forces on the passenger.
(c) Calculate the apparent weight of the passenger if her mass is 60.0 kg.
The charges are fixed to the corners of a 0.44-m square, one to a corner, in such a way that the net force on any charge is directed toward the center of the square.
In an adiabatic centrifugal compressor atmospheric air at 15 degree Celsius is compared to 600kPa pressure. Find the specific compression work and the efficiency of the compressor
The temperature of a monatomic ideal gas with a mass per mole of 0.00750 kg/mol is 298 K. What is the mass of the gas
The disk in a CD player does not rotate at a constant rate, but spins at a rate determined by a control circuit so that the linear speed of the track being read is constant, what will be its rotation rate at the end
A coil has 480 turns and self-inductance 3.40 mH. At t = 0.0150 s, what is the magnitude of the induced emf
A 400kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Find out the force exerted by the man.
The wheel of the car has a radius of 0.340 m. The engine of the car applies a torque of 282 N•m to this wheel, that does not slip against the road surface. Since the wheel does not slip, the road must be applying the force of static friction to the w..
q1. a vaulter holds a 31.67-n pole in equilibrium by exerting an upward force u with her leading hand and a downward
A molecule of DNA (deoxyribonucleic acid) is 2.07 µm long. The ends of the molecule become singly ionized: negative on one end, Determine the effective spring constant of the molecule
A 6.43 kg ball is thrown upward with an initial speed of 14.34 m/s. Ignore air resistance when answering the following questions. What is the ball's initial kinetic energy
A water hose 2.75 cm in diameter is used by a gardener to fill a 28.0-liter bucket. (One liter = 1,000 cm3.) Over what horizontal distance can the water be projected
A 48.9 g ball of copper has a net charge of 3.0 µC. What fraction of the copper's electrons have been removed
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