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Q1. A skier is accelerating down a 30.0° hill at a = 4.50 m/s2
(a) what is the vertical component of her acceleration? m/s2 (downward)
(b) How long will it take her to reach the bottom of the hill, assume she starts from rest and accelerates uniformly, if the elevation change is 306 m?
Q2. A 40 percent efficient electric power plant produces 900MW of electric power and discharges waste heat into 30 C ocean water. Suppose the waste heat could be used to heat homes during the winter instead of being discharged into the ocean. A typical American house requires the average 30 kW for heating. How many homes could be heated with the waste heat of this one power plant?
Show that the boundary conditions far away from the cylinder
Then find the force between them as a function of distance h. describe why the sign of the force does (or does not) make sense to you.
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s.What is the frequency heard by the observer . What must be the result have been for the horizontal speed.
James is scheduled for a job interview with Ms. Farrar. He knows that she is in charge of selecting, placing, and evaluating employees for her firm, but he cannot remember her educational background. Which is most likely Ms. Farrar's educational back..
What is velocity of the boat relative to the shore
The parallel metal plate of a capacitor is seperated by a distance of 0.5cm and is connected to a 90v battery. Find an electric field between them and the surface charge density.
Find out the gravitational potential energy
A 48.9 kg pole vaulter running at 13.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.7 m/s and disregarding air resistance, how high was jump.
What is the angular acceleration
What is tension T in each of the cables
What is the horizontal distance x to the base of the wall supporting the mirror of the near point on the floor that can be seen reflected in the mirror . What is the speed of the third fragment? Overlook effects due to gravity.
Mary is driving her car at 48 km/h. She approaches an intersection just as the traffic light turns yellow. The yellow light lasts only 3.0 s before turning to red, and she is 30 m away from the near side of the intersection.
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