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At a distance of 13.0 km from a radio transmitter, the amplitude of the radiated electric field of the radio transmissions is measured to be 0.20 volts/meter. Assuming that the radio transmitter is broadcasting with equal intensity in all directions, what is the total power emitted by the radio station?
In 1987, Marisa Canofoglia, of Italy, roller-skated at a record -setting speed of 40.3 km/h. If the her momentum was 660 kg×m/s, what was her mass
A thin rectangular plate of uniform areal density ? = 2.90 kg/m2 has length of 34.0 cm and width of 24.0 cm. There is a circular hole of radius 6.00 cm with center at (x,y) = (11.00,10.00) cm in the plate. Calculate the mass of plate
A uniform, thin, solid door has height 2.10 m, width 0.820 m, and mass 23.5 kg. Find its moment of inertia for rotation on its hinges
A 3.5 m long horizontal rod has two forces applied to it. One on the far left corner with a force of 4N at 60 degrees downward, find the magnitude and direction of the force in the pin
A rectanglar block of iron 9.68x10^-8 ohms has dimensions 1.20 X 1.60 X 2.50 cm, What is the minimum resistance of the block
A 0.840-kg block oscillates on the end of a spring whose spring constant is k= 42.0 N/m . The mass moves in a fluid which offers a resistive force F=-bv, where b = 0.640 N*s/m. What is the fractional decrease in amplitude per cycle?
A proton is initially at rest at a point where the potential is 459 V. Sometime later the proton is at a point where the potential is 218 V. If no force other than an electrostatic force acts on the proton, what is its final kinetic energy.
A disk of radius R = 9 cm is pulled along a friction less surface with a force of F = 15 N by a string wrapped around the edge. At the instant when d = 28 cm of string has unwound off the disk, what is torque exerted about the center of the disk.
A person jumps up and down on a trampoline, while staying in contact with it. The motion is simple harmonic motion and it takes 1.90s to complete one cycle.
A 2 kg projectile is shot straight up with initial velocity v0= 50 m/s. find the Maximum value of the gravitational potential energy
Suppose a ski-jumper lands at a point 63 m down an incline of 35 degrees, What was her speed at take-off
Write down the mathematical relationship between velocity (v) and time (t) for a coin tossed up into the air after it leaves the thrower's hand at t=0 with a velocity of +15.0 m/s. Assume that the positive direction is upward and the acceleration of ..
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