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Tension is maintained in a string The observed wave speed is 26.5 m/s when the suspended mass is m = 2.87 kg. What is the mass per unit length of the string? What is the wave speed when the suspended mass is m = 2.18 kg?
Two astronauts, each having a mass of 88.0 kg, are connected by a 10.0 m rope of negligible mass. What is the new rotational energy of the system
A solid cylinder of mass 10 kg is pivoted about a frictionless axis thought the center O. How many radians does the cylinder rotate through in the first 5.0 seconds, if it starts from rest
The take-up reel of a cassette tape has an average radius of 1.4 cm. Find the length of tape (in meters) that passes around the reel in 38 s
What is the electric field strength between the disks? A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have
in a 10ft^2 room wiyh no window and no doors . The air in the room is 79% N(sub2) and 21% O(sub2). What is the weight of the air
A wire of length L is wound into a square coil with 127 turns and used in a generator that operates at 60.0 Hz, What is the length Lof the wire used to construct the coil
A 529 kg automobile slides across an icy street at a speed of 66.0 km/h and collides with the parked car which has a mass of 856 kg. The two cars lock up and slide together. What is the velocity of the two cars just after they collide.
You notice a group of children beside the ramp. One has a 2 kg rock tied to the end of a string that is 3 m long, What will happen if the string breaks? why?
A 75 W light bulb with a resistance of 179 ? is connected to a power supply with a 121 V. What is the internal resistance of the power supply
When a softball player swings a bat, she accelerates it from rest to an angular velocity of 10 rad/s in a time of 0.27686 seconds. find the magnitude of the torque she applies to the end of the bat
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 1.80X106 m/s. Find the centripetal acceleration of the electron
Clifford is in a real hurry, however, and skips the speedramp. Starting from rest with an acceleration of 0.39 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. Illustrate what is the speed at which the belt of the ra..
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