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Three horizontal forces act on a packing crate on a horizontal surface: 600 N to the left, 200 N to the right, and friction. The packing crate remains at rest. The weight of the crate is 400 N. If the 600 N force is removed, the net force acting on the block is:
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. How much time is required for the projectile to come up to speed
An x-ray photon of 0.12 nm strikes a metal and undergoes Compton scattering of the electrons in the metal. What is the momentum of the incident photon
An object, 0.75 cm tall, is placed 12.0 cm to the left of a diverging lens (f = -8.00 cm). determine the focal length of the converging lens
Two boxes with different masses M1 = 0.7 kg and M2 = 2.3 kg are tied together on a frictionless ramp surface, What is the tension in the rope connecting the two boxes
a lantern slides down a driveway with an incline of 37 deg. If the coefficient of kinetic friction is .20. What is the acceleration of the lantern down the drive way
A charged particle is injected at 153 m/s into a 0.0747-T uniform magnetic magnetic field perpendicularly to the field. What is the charge-to-mass ratio of this particle
toad make use of resonance in a closed tube to produce very loud sound the tube is its swin bladder used as an amplifier the sound level of the creature has been measured as 71dB calculate the intensity of the sound
A 250 g, 24-cm-diameter plastic disk is spun on an axle through its center by an electric motor. What torque must the motor supply to take the disk from 0 to 1600 rpm in 4.1 s
A hollow cylinder of mass 0.141 kg and radius 4.10 cm has a string wrapped several times around it, Find the acceleration of the cylinder
An electric heater carries a current of 16.5 A when operating at a voltage of 1.50 102 V. What is the resistance of the heater
How many cubic centimeters are in a cubic kilometer? The speed of sound in air at sea level is around 340m/s. Express this speed in mi/hr. The speed of light in a vacuum is about 3108m/s. Express this speed in both mi/hr and miles per second.
At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.40, How fast is the automobile traveling when it overtakes the truck
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