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A woman stands on a scale in a moving elevator. Her mass is 70.5 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9300 N. What does the scale read during the acceleration?
On average, each person in the industrialized world is responsible for the emission of 10,000 kg of carbon dioxide () every year. This includes that you generate directly, how long would each edge of the cube be
A series RCL circuit includes a resistance of 298 ohm, an inductive reactance of 649 ohm, and a capacitive reactance of 415 ohm. The current in the circuit is 0.317 A. What is the voltage of the alternator?
Two solid spheres, each of mass m, are rolling without slipping with a speed v. If the spheres have radii R1 and R2 with R1/R2 = 5.5, what is the ratio of their kinetic energies
A boy throws a ball into an open window 10m above his shoulder at 65 degrees with the horizontal. He observes that the ball flies in horizontal. A. What is the initial speed of the ball
A popular carnival ride consists of a large, round room that rotates fast enough that any person standing against the wall will be stuck there, even as the floor is dropped away from their feet. What is the room's angular speed in rpm
a competitive mini-golf player notices an opponents ball situated 50cm in front of a wallcontaining two tunnels. one
a physical pendulum consists of a uniform solid disk (of radius R = 56.6 cm) supported in a vertical plane by a pivot located a distance d = 24.0 cm from the center of the disk. What is the period of the resulting simple harmonic motion
if a 2.5 kg ball puts 118 joules of energy in a spring with a 614 n/m constant, how far is the spring compressed.
A man uses a tire iron to loosen his lug nuts. The tire iron is 25cm long. The man applies a force of 30N at an angle of 29° to the iron. What is the torque that is applied to the lug nut
neglect air resistance for the following. a soccer ball is kicked from the ground into the air. when the ball is at a
a hemispherical shell of radius a1 cm has a surface charge density of m4.00 ucm2.i believe the surface area of a
A helicopter is ascending vertically with a speed of 5.02m/s. At a height of 140m above the Earth, a package is dropped from the window. How much time does it take for the package to reach ground.
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