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The length of a beam increases by 1.26mm when its temperature is raised from 29.87oC to 71.49 oC. What is the length of the beam at the initial temperature? The thermal expansion coefficient of the material is 0.000025 /oC.
An electric motor operates at 6 volts. In order to lift a mass of 1 kilogram a distance of 2 meter in 3 seconds, how much current in amps must the motor draw? (Assume the motor is 100% efficient.)
A 2-kg book with no initial velocity slides down an inclined plane with an angle of 20 degrees a total of 2 meters. The force of friction does 10 Joules of work, what is the final kinetic energy of the system as the book reaches the bottom of the ..
A -6.00 µC charge is moving with a speed of 8.20 104 m/s parallel to a very long, straight wire, Find the magnitude and direction of the force on the charge.
A small block of mass m = 1.5 kg slides, without friction, along the loop-the-loop track shown. the block starts from the point P a distance h = 54 m above the bottom of the loop of radius R = 17.0 m. What is the kinetic energy of the mass at the ..
A steel beam that is 7.00m long weighs 330N. It rests on two supports, 3.00m apart, with equal amounts of beam extending from each end. Suki, who weighs 505 N, stands on the beam in the center and then walks toward one end. How close to the end can s..
Rope BCA passes through a pulley at point C and supports a crate at point A. Rope segment CD supports the pulley, What is the angle required for equilibrium?
How much work must be done on the electron to move it to negative plate if it is initially positioned 2.86 mm from the positive plate.
A person with mass m1 = 60 kg stands at the left end of a uniform beam with mass m2 = 91 kg and a length L = 3.2 m, What is the location of the center of mass of the system
Assume after charging a 4.80 microF capacitor to 5 V you connect it to the second uncharged capacitor of 15 microF. What voltage will you voltmeter read across the second capacitor after repeating charge sharing process two times? State the answer..
A series RL circuit with L = 3.00 H and a series RC circuit with C = 3.00 μF have equal time constants. If the two circuits contain the similar resistance R.
Wildlife biologists fire 20-g rubber bullets to stop a rhinoceros charging at 0.81m/s. What impulse does each bullet deliver
A car is travelling at a constant speed of 32m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from ramp.
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