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Two people are pulling a boat through the water as in the figure below. Each exerts a force of 600 N directed at a ? = 45.0° angle relative to the forward motion of the boat. If the boat moves with constant velocity, find the resistive force exerted by the water on the boat.
In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, How much work did Arfeuille do on the object
An object of mass b has a speed that changes with distance d according to v = bx^-n. What is the force as a function of time
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown
My professor today stated that if a ball was to fall a certain height, then the work done by gravity on the ball would equal the work done by the ball's equal and opposite gravitational pull. By W=F*d, this means that the earth must travel the ..
A blackened, solid copper sphere that has a radius equal to 4.5 cm hangs in an evacuated enclosure whose walls have a temperature of 23°C. find the initial rate at which its temperature changes
An artificial lens is implanted in a person's eye to replace a diseased lens. The distance between the artificial lens and the retina is 2.70 cm. What is the power of the implanted lens
Suppose a straight 1.35mm -diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B, What current would the wire carry
Moment of inertia Wheel If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.72rev/s, what is the magnitude of the frictional torque
question1a 52 kg mountain climber starting from rest climbs a vertical space of 730 m. at the top she is again at rest.
A glass rod that has been charged to + 17.0nC touches a metal sphere. Afterward, the rod's charge is + 9.0nC
I once observed a woman on an airplane at night with a camera. As we flew low over Washington DC she was impressed with the view of the city lights in the dark. She stood back in the aisle and tried to take the picture by the window using her flash. ..
An AM radio transmitter broadcasts 47.0 kW of power uniformly in all directions, What is the maximum electric field strength at this distance
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