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A child bounces a 56 g superball on the side walk. The velocity change of the superball is from 24 m/s downward to 18 m/s upward. If the contact time with the sidewalk is 1/800 s, what is the magnitude of the force exerted on the superball by the sidewalk?
Answer in units of N.
A scuba diver is 40 m below the surface of a lake, where thetemperature is 5 degrees C. He releases an air bubble with avolume of 15 cm^3. What is the volume of the bubbleright
An isolated, irregularly shaped piece of platinum carries -8.59 × 10-9 C of charge and is in electric equilibrium. The size of this body is about 4 mm. Calculate the potential at a distance of 5.63 m from the center of the charged piece of platinum?
consider a 160 turn circular conducting coil with a radius of 15.4 cm. this coil rotates about an axis which passes
In a specific heat experiment, 200 g of aluminium (Cp=0.215 cal/g.C) at 1000C is mixed with 50 g of water at 20C. Find the difference in entropy of the system at the end from its value before mixing? (please explain)
Using m=mo/(1-v^2/c^2)^(1/2) to describe the special relativistic effects on an electron orbiting with a speed v in an atom, estimate the percentage correction to the n=1 energy in a hydrogen atom or a uranium atom.
a snowball rolls off a barn roof that slopes downward at an angle of 40.0 degrees. the edge of the roof is 14.0 meters
To stretch a relaxed biceps muscle 2.30cm requires a force of 25 N. Find the Young's modulus for muscle tissue assume it to be a uniform cylinder of length 0.24 m and cross-sectional area 51 cm2.
An electric fan is turned off, and its angular velocity decreases uniformly from 400 rev/min to 220 rev/min in 5.00 s. Find the angular acceleration in rev/s^2. Find the number of revolutions made by the motor in the 5.00 s interval. How many more..
Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first at 20 m/s, What does the frequency the horns emit
A mass m= 200kg hangs from a horizontal ceiling by two cables, one of length 3.0m and the other 4.0 m ; What is the tension in each cable
A coil with 25 turns of a square shape of 1.80 cm on each side. Find the magnitude and direction of the induced current in the coil
a physical pendulum is constructed from a uniform thin rod of length l suspended from one end. the center of gravity
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