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A shot-putter accelerates a 7.3 kg shot from rest to 14 m/s. If this motion takes 2.0 s, what average power was developed?
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Question: A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha part ...
question: A single loop of wire with an area of 9.03Ã-10-2 m^2 is in a uniform magnetic field that has an initial value of 3.66 T, is perpendicular to the plane of the loop, and is decreasing at a constant rate of 0.199 ...
One cubic meter (1.00m^3) of concrete has a mass of 2.30E+3kg, and 1.00m^3 of copper has a mass of 8.92E+3kg. Find the radius of an concrete sphere whose mass is the same as that of an copper sphere of radius 1.28cm?
Questin: A research submarine has a 30-cm-diameter window that is 9.0cm thick. The manufacturer says the window can withstand forces up to 1.2*10^6N . What is the submarine's maximum safe depth in salt water? The pressur ...
Question: Suppose you have a fixed charge of -15.0 nC at point X. Points A and B are to the right of point X at distances of 20.0 cm and 40.0 cm from X respectively. Calculate the following: a) the potential at points A ...
Question: A soap bubble is essentially a thin film of water surrounded by air. The colors you see in soap bubbles are produced by interference. What visible wavelengths of light are strongly reflected from a 390 {\rm nm} ...
Question: A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 3.90 ÎC. What is the potential difference between the plates? Express your answer with the appropriate units. Part B If th ...
Question: Your physics textbook is sliding to the right across the table. Part A Identify all forces acting on the object and draw a free-body diagram. Draw the vectors starting at the black dot. The location and orienta ...
Question: A skydiver has his parachute open and is floating downward through the air at a constant speed. Identify all the forces acting on the system skydiver-parachute. Check all that apply. Weight, w? Normal force, n? ...
Question: Tim and Rick both can run at speed v_r and walk at speed v_w, with v_r > v_w They set off together on a journey of distance D. Rick walks half of the distance and runs the other half. Tim walks half of the time ...
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