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A hill that has a 25.7% grade is one that rises 25.7 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
At sea level, at latitude where, the pendulum that takes 2.00s for a complete swing back and forth has a length of 0.993m. What is the value of g in m/s2 at the location where the length of such a pendulum is 0.970m.
What is wave speed
A weightlifter bench-presses a 170.0 kg barbell from his chest to a height equal the length of his arms 0.750 m. What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
A typical capacitor in an MP3 player has C = 5 ?F. If a charge ±37 ?C is placed on the plates, what is the voltage across the capacitor?
Two speakers, one straight behind the other, are each generating a 285 Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Suppose that the s..
A 75 g piece of ice at an initially unknown temperature is placed into a glass of 350 g of water sitting at room temperature, What is the specific heat capacity of the unknown metal
A 15.0 kg block of ice at 0 degrees C falls into Lake Superior, which is a freshwater lake. What is the change in entropy, delta S, of the lake
The acceleration due to gravity on the Moon's surface is known to be about one-sixth the acceleration due to gravity on the Earth. find the mass of the Moon in terms of the mass of the Earth
A golf ball strikes a hard, smooth floor at an angle of 30 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impuls..
A ship travels 155 km from the port on a course of 35 degrees south of west to an island, then it travels 142 km east of south to a second island, Find the displacement from the starting point to the ending point
Two spherical balls have volumes in the ratio of 27:1. What is the ratio of their surface areas
Both an alpha particle and an electron are placed in a capacitor that is .0015 m wide (opposite plates. estimate the potential difference between the plates
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