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A rock is thrown from the roof of a building, by an initial velocity of 10.0m/s at an angle of 30.0degree above the horizontal. The rock is observed to strike the ground 43.0m from the base of the building. What is the height of the building assuming no air drag?
A pendulum of length 3.53 m with a bob of mass 5.50 kg is pulled aside until the bob makes an angle of 35.0° with the vertical. Find the speed of the bob as it passes through the lowest point in its swing
An archer fish spies a meal of a grasshopper sitting on a long stalk of grass at the edge of the pond in which he is swimming. What angle above the horizontal must he spit
A laser beam is incident on the left mirror. Its initial direction is parallel to a line that bisects the mirrors. What is the angle of the reflected laser beam
A parallel combination of an 10 resistor and an unknown resistor R is connected in series with a 13 resistor and a battery. What is the unknown resistance R
As a parallel-plate capacitor with circular plates 21 cm in diameter is being charged, the current density of the displacement current in the region between the plates is uniform and has a magnitude of 22 A/m2.
Ten boxes, each 22.0 cm high and weighing235 N, initially are all side by side onthe floor. The boxes are lifted and placed in a vertical stack2.20 m high in a time interval of5.50 s. Compute the power necessary to stack the boxes.
What phase difference between two otherwise identical harmonic waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 1.4 times that of the amplitude of either of the combining waves? Exp..
A room with 2.9m high ceilings has a metal plate on the floor with V= 0V and a separate metal plate on the ceiling. How high does the ball go if the ceiling voltage is 3.5×10^6V
a diver running 2.3ms drives out horizontally from the edge of a vertical cliff and 3.1rm s later reaches the water
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 satellite orbiting the moon very near the surface has a period of 110 min, What is the free-fall acceleration on the surface of the moon in SI units
A solid sphere is released from rest and allowed to roll down aboard that has one end resting on the floor and is tiltedat 39° with respect to the horizontal. what is the sphere's speed when it reaches the lowest end of the board
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