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You break a piece of Styrofoam packing material, and it releases lots of little spheres whose electric charge makes them stick annoyingly to you. If two of the spheres carry equal charges and repel with a force of 24 when they're 16 apart, what's the magnitude of the charge on each?
A block of mass m = 4 kg slides back and forth on a frictionless horizontal track. It is attached to a spring with a relaxed length of L = 4 m, By what length is the spring extended
a variable capacitor in a circuit with a 120v, 60-Hz source initially has a capacitance of .25uf. The capacitance is then increased to .4uf. What is the percentage change in the current in the circuit
Tuning forks are used in the diagnosis of nervous afflictions known as large-fiber polyneuropathies, which are often manifested in the form of reduced sensitivity to vibrations. Find the maximum acceleration of the tips
A record was set for stair climbing when a man ran up the 2000 steps of the Empire State Building in 13 minutes and 10 seconds. what was his average power output during the climb
A steel cable with a total length of 27.7 m and total mass of 91 kg is connected to two poles. Calculate the wavelength of the resulting wave on the cable
Pressure Variations and Ocean Exploration, How do the pressure variations with depth affect the ability to explore the ocean? How does it affect scuba diving
An AC voltage of the form ?v = 100 sin 1 000t, where ?v is in volts and t is in seconds, is applied to a series RLC circuit. Find the average power delivered to the circuit
Two uniform solid cylinders, each rotating about its central (longitudinal) axis, have the same mass of 3.74 kg, What is the rotational kinetic energy of the smaller cylinder
A solid uniform marble and a block of ice, each with the same mass, start from rest at the same height above the bottom of a hill and move down it. Find the speed of each of these objects when it reaches the bottom of the hill
Young's modulus of nylon is 3.7 × 109 N/m2. A force of 6.0 × 105 N is applied to a 1.5-m length of nylon of cross sectional area 0.25 m squared
A cannon fires a cannon ball with an Inital speed of 67 m/s at an angle of 35 degrees above the horizontal. what is the inital vertical velocity of the cannon ball
A novice skier, starting from rest, slides down a frictionless 28.00 incline whose vertical height is 170. How fast is she going while she reaches the bottom?
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