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A baseball outfielder throws a .150-kg baseball at a speed of 40.0m/s and an initial angle of 30 degrees. What is the kinetic energyof the baseball at the highest point of its trajectory?
Water is being boiled in an open kettle that has a 0.500 cm thickcircular aluminum bottom with a radius of 11 cm. If the water boils away at rate of0.480 kg/min, what is the temperatureof the lower surface of the bottom of the kettle? Assume that the..
A tube is open only at one end. A certain harmonic generted by the tube has a frequency of 470Hz. The next higher harmonic has a frequency of 555Hz. The speed of sound in air is 343m/s.
A heat engine operates between two reservoirs at temperatures of 19.5oC and 313oC. What is the maximum efficiency possible for this engine
A 1.44 kg monkey wrench is pivoted at oneend and allowed to swing as a physical pendulum. The period of itsmotion is 0.860 s, and the pivot is0.290 m from the center of mass of the wrench.
A fisherman standing on the edge of a pier hooks a fish on the surface of the water, and reels in the fishing line at a constant 0.50m/s. If the fisherman's fishing rod is a height of 3.0 m above the water, at what speed is the fish moving (horizonta..
A cart of mass (851.8 +- 0.1)g is configured in a setup. The tension in the string is 0.36 N and the cart has a displacement of 40.9cm
A Styrofoam calorimeter contains 40.0g of water at 50°C. To this we add 2.0g of ice at initial temperature of 0°C. How much heat (in calories) is needed to melt the ice
However, the current increases by just 0.11 A when R1 is removed, leaving R2 connected across the battery. Find (a) R1 and (b) R2.
A rock is thrown vertically upward with a speed of 15.0m/s from the roof of a building that is 70.0m above the ground. What is the speed of the rock just before it strikes the ground
a series combination of a resistor and a capacitor are connected to a 120-v rms 69.2-hz ac source. if the capacitance
what common temperature must the two pieces be heated.
A child whose weight is 262 N slides down a 4.80 m playground slide that makes an angle of 49° with the horizontal. The coefficient of kinetic friction between slide and child is 0.09.
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