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Q. A loudspeaker of mass 18.00 kg is suspended a distance of h= 1.60.below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of t= 3.90 m. What is the tension in each of the cables? Use 9.80 for the magnitude of the acceleration due to gravity.
Q. A 0.105 kg hockey puck moving at 22 m/s is caught and held by a 79.00 kg goalie at rest. With what speed does the goalie slide on the ice?
The train on the right accelerates leftward at 0.82 m/s2.How far does train on the left travel before the front ends of the trains pass.
Suppose an ideal gas is in a container 3L in volume and allowed to expand by having a piston move. The final volume after the piston moves is 15L. If the gas is at first at a pressure of 1×10^5 Pa and a temperature of 300 K, and temperature is mai..
suppose the radius of the ball is very small compared to other length scales in the problem. Take starting level as step 0, the next step down as step 1, and so on.
A certain type of laser emits light that has a frequency of 5.6 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 3.9 x 10-11 s.
A 3.60-{rm m}-long, 430 {rm kg} steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 {rm kg} construction worker stands at the far end of the beam. What is the magnitude..
A proton is initially at rest at a point where the potential is 459 V. Sometime later the proton is at a point where the potential is 218 V. If no force other than an electrostatic force acts on the proton, what is its final kinetic energy.
A child of mass 24 kg sits 2.10m to the left of the center of a seesaw. The mass of the seesaw is 35 kg. How far to the right of the central pivot must a second child of mass 40 kg sit if the seesaw is to be perfectly balanced.
An unmarked police car travelling a constant 85 km/h is passed by a speeder travelling 145km/h. Precisely 1s after the speeder passes, police officer steps on the accelerator.
What is the electric potential energy of the system.
Two small metallic spheres, each of mass 0.20g, are suspended as pendulums by light strings from a common point.
The springs of a 1600 kg car compress 5.0 mm when its 65 kg driver gets into the driver's seat. If the car goes over a bump, what would be frequency of vibrations.
What happens to the resistance of copper wire after dunking it in liquid nitrogen? and what happens to the resistance of a carbon resistor when you dunk it in liquid nitrogen.
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