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It takes 21.2 seconds to hoist a rescue diver of mass 81 kg from the ocean surface to a helicopter hovering 20.8 meters above the ocean surface using a motor-driven cable.
How much power (in Watts) was supplied by the motor to hoist the diver into the helicopter at a constant speed?
A capacitor is constructed of two concentric conducting cylindrical heels. The radius of the inner cylindrical shell is 2.32 x10-3 m, and that of the outer shell is 2.52 x10-3 m. When the cylinders carry equal and opposite charges of magnitude 2.3 x ..
the electric potential at a position located a distance of 18.9 mm from a positive point charge of 6.80x10-9c and 13.3
A race car rounds a curve at 54 m/s. The radius of the curve is 406 m, and the car's mass is 685 kg. What is the centripetal force acting on the car? What is the car's (centripetal) acceleration?
A 685-kg elevator starts from rest and moves upward for 2.70 s by constant acceleration until it reaches its cruising speed, 1.75 m/s. What is the average power of the elevator motor through this period?
A house has a floor area of 110m 2 and an outside wall that has an area of 27 m 2 . The earth's magnetic field here has a horizontal component of 2.90*10 -5 T that points due north and a vertical component of 3.50*10 -5 T that points straight down..
A stone is thrown vertically upward with a sped of 12.0 m/s from the edge of a cliff 70.0 M high. How much later does it reach the bottom of the cliff
A 5.00?F capacitor that is initially uncharged is connected in series with a 5.50k? resistor and an emf source with E= 145V negligible internal resistance, Just after the circuit is completed, what is the voltage drop across the capacitor
The earth orbits the sun in an approximately circular orbit of radius 1.496x10^11 m, Use these data to determine the mass of the sun
A spherical shell of inner radius a and outer radius b is constructed of uniformly magnetized material with magnetization M. (a) Find the equivalent volume and surface current distributions.
You want to create an electric field at location. where would you place an electron to produce this filed at the origin
Sam and his father ride a motorbike in order to throw a bomb up and through a hole on the top of a dome. The bomb goes up through the hole, Find what is wrong with the bomb falling near the hole edge
One radiator has a volume of 0.09mt³. It contains saturated vapor at a temperature of 100°C. find The total mass of vapor in the radiator
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