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A parabolic reflector brings 10% of 10^4 square meters of sunlight to bear on a 2 meter deep swimming pool that holds 100 metric tons of water for one hour daily. Assuming the pool's temp starts at 30 degrees C, how hot is it in one hour?
q1. a superball with a mass of 62.50 g is dropped from a height of 1.70 m. it rebounds to a height of 1.47 m.what is
A machine componant is subjected to the forces and couples shown. The componant is to be held in place by a single rivet that can resist a force but not a couple. determiune the location of the rivet hole
An unknown piece of material with a mass of 5.1 kg and density of 1422 kg/m^3 is suspended from a string and then completely immersed in a container of water. Determine the volume of the piece of material
A hang glider and its pilot have a total mass equal to 119 kg. While executing a 360° turn, What is the net force on the hang glider
An inductor, a capacitor, and a 64.0-? resistor are connected in series with an AC generator; the generator produces an RMS voltage of 90 V. what is the average power output of the generator
A tennis ball gun launches tennis balls at 17.6 m/s . It's pointed straight up and launches one ball; 2.0 s later, it launches a second ball. I already found - At what time (after the first launch) are the two balls at the same height? = 2.8s What..
Two identical diverging lenses are separated by 23 cm. The focal length of each lens is -14 cm. find the final image distance relative to the lens on the right
A tugboat pulls two barges with a force of 3000N. The water slows each of the boats with a force of 200N (3 total forces of 200N each). what is the accleration of the boats
a man stands on the roof of a building of height 16.1m and throws a rock with a velocity of magnitude 26.8 m/s, Calculate the maximum height above the roof reached by the rock
A student drops two metallic objects into a 120-g steel container holding 150 g of water at 25°C. One object is a 230-g cube of copper that is initially at 85°C, What is the mass of the aluminum chunk
A 1.0 µF capacitor is connected in parallel with a 2.4 µF capacitor, What is the equivalent capacitance of this combination
Dave needs to get groceries from the store, which is a distance D = 1.1km east of his house. How long in seconds does it take dave to reach the store
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