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An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.7 m (9 ft) is connected to an electric heater which draws 11.5 A on a 120-V line.
How much power is dissipated in the cord?
a 0.1kg ball moving at 10 m/s collides with a 1 kg block that is initially at rest. Find the ratio of the kinetic energies of the two objects after collision
question1a 1201.0 n uniform boom of length l is supported by a cable. the boom is pivoted at the bottom the cable is
A 770 kg car moving at 21 m/s brakes to a stop. The brakes contain about 15 kg of iron, which absorbs the energy. What is the increase in temperature of the brakes.
A 1.5 kg object initially at rest is raised to a height of 10 m by a force of 40 N. What is the velocity of the object at this height What time is needed for this motion
A liquid of refractive index 'n' is filled in a beaker of height 'h'. Find the amount by which a coin at its bottom seems to be raised.
A ball swings in a vertical circle at the end of a rope 1.40 m long. When the ball is 35.5° past the lowest point on its way up, Determine the magnitude of its radial acceleration
A laser beam is incident on two slits with a separation of 0.210 mm, and a screen is placed 5.30 m from the slits. what is the wavelength of the laser light
A water bed for sale has dimensions of 1.83 m x 2.13 m x 0.229 m. Find the weight of the water in the bed
A 3.80 m-long, 430 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 kg construction worker stands at the far end of the beam. What is the magnitude of torque abou..
question1a curve of radius 160 m is banked at an angle of 11deg. an 808-kg car negotiates the curve at 88 kmh without
You would like to store 9.4J of energy in the magnetic field of a solenoid. What is the energy density (energy/volume) inside the solenoid
A race car, traveling at a constant speed of 50 m/s, driver around a circular track of radius 500 m. What magnitude acceleration does it experience
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