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A tennis player standing 9.2 m from the net hits the ball above the horizontal. To clear the net, the ball must rise at least 0.42 m. If the ball just clears the net at the peak of its trajectory, how fast was the ball moving when it left the racket and at what angle was the ball hit?
A satellite requires a battery with an open-circuit voltage vOC = 36 V and a Thévenin resistance RT = 10 Ω. - Design a minimum weight battery that meets the open-circuit voltage and Thévenin resistance requirements.
(a) What is the energy flux at the surface of Sirius? (b) What is the star's surface temperature?
An electron is released from rest in an electric field of 2.13 x 10-10 N/C pointing to the right. After the electron has traveled a distance of 1.2 micrometers, what is its velocity?
A firm wants to determine the amount of frictional torque in their current line of grindstones, so they can redesign them to be more energy efficient. What is the frictional torque exerted on the grindstone
A hydraulic jack is made with a small piston 1.3 cm in diameter that is used to move a large piston 5.2 cm in diameter. how heavy a load can he lift with the jack
A 115kg mail bag hangs by a vertical rope 3.5m long. Find the force needed to hold the bag in its new position
On a part-time job, you are asked to bring a cylindrical iron rod of length 94.7cm and diameter 2.50cm from a storage room to a machinist. Calculate the weight of the rod
A stationary sonar station sends out a sound pulse at 40.000 MHz. It receives a pulse back from an object directly below it with a time delay of 80 ms at a frequency of 39.958 MHz. Determine the vertical speed of the object
A lens is placed 15 cm from the lamp, and the image is observed 32 cm from the lamp. find the distance of the second image from the lamp
Two negative point charges are separated by 10.0cm and feel a mutual repulsive force of 1.55N. The charge of one is three times that of the other. How much charge does each have? What would be the force if the total charge were instead equally distri..
Calculate the work done by the force during the first time interval and calculate the velocity of the object - the work-energy theorem to find the maximum compression of the spring.
A fox fleeing from a hunter encounters a 0.795 m tall fence and attempts to jump it. By how much does the fox clear the fence
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