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A telephone cord is 3.85 m long and has a mass of 0.190 kg. A transverse pulse is produced with plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.740 s. What is the tension in the cord?
A person sitting quietly in a room on a winter day may lose heat primarily by radiation from the outer surface of her clothes to the walls of the room. what is the temperature of the outer surface of the clothes
a 45.6 g sample of a conducting material is all that is available. the resistivity of the material is measured to be
The 2.4-m reflecting Hubble Space Telescope has been placed into Earth orbit by the space shuttle. What angular resolution could this telescope achieve ifthe wavelength is 500 nm?
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +7q, What is the ratio of the final charge on sphere C to q, What is the ratio of the final total charge on the three spheres to q
A 2.30 N force pushes it to the left, and a 0.800 N force pushes it to the right. (a) Taking right to be positive, what is the net force acting on it? (b) What is its acceleration?
A toy train is pushed forward and released at x0=2.0 m with a speed of 2.0 m/s. What is the magnitude of the train's acceleration after its wheel begins to stick
) If the pressure of the 2.2-cm3 volume is reduced to 1.2 10-11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
You have a flashlight that uses 0.75 watts of power and requires 1.5 volt battery, How many joules of energy are used by the flashlight in 15 minutes
You wind a small paper tube uniformly with 197 turns of thin wire to form a solenoid. What is the inductance, in microhenries, of your solenoid
Bill is flying an airplane with air speed 30.0 m/s. going south. Mike is on the ground and sees the plane traveling 25.0 m/s, 15 degrees east of south. What is the component of the wind's velocity to the north
A crane is required to pull up a load of building supplies from the ground to a height of 90 m at a constant velocity. Find the power output required of the motor that pulls the cable up
a sealed metal container contains a gas at 20 degrees celsius and 1 atm. to what temperature must the gas be heated to
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