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A pendulum bob of mass m is attached to a massless string of length L. If the bob is released from rest at a horizontal position, what is the speed of the bob when the string makes an angle theta with respect to the vertical direction? What is the tension in the string? What is the tangential acceleration of the bob at the angle theta?
An 1800W toaster, a 1.3kW electric frying pan, and a 120 W lamp are plugged into the same 35A, 140V circuit. what is the resistance of each device
The speed of a projectile when it reaches its maximum height is 0.39 times its speed when it is at half its maximum height
Determine the amount by which the star's thermal radiation increases the entropy of the universe each second. Assume that the star is a perfect blackbody, and that the average temperature of the rest of the universe is 2.73 K. Do not consider ther..
a positive charge of -4 microcoulombs is llocated at the center of a spherical shell of inner radius 2cm and outer radius 3cm, what is the total charge on he inner shell
A helium-filled weather balloon has a 0.90 m radius at liftoff where air pressure is 1.0 atm, What is the pressure at the airborne location
Green light (? = 546 nm) strikes a single slit at normal incidence. What width slit will produce a central maximum
Compute magnitude of the average emf
Find the net rate of heat loss by radiation from a skier standing in the shade, given the following. She is completely clothed in white (head to foot, including a ski mask)
Suppose manufactures increase in size of compact disks. By what factor will the moment of inertia increase
A friend tells you that when he takes off his eyeglasses and holds them 18cm above a printed page, what is the focal length of your friend's glasses
A 3.7-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,062oC is placed on top of a 2.5-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
A distance away from a uniformly charged spherical object, the magnitude of the electric field is 575V/m and the electric potential is 3.50kV. (a) What is the distance to the center of the object? (b) What is the magnitude of the charge?
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