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An 80kg quarterback jumps straight up in the air right before throwing a 0.43kg football horizontally at 15m/s . How fast will he be moving backward just after releasing the ball?
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Question: A piano tuner stretches a steel piano wire with a tension of 765 N. The steel wire has a length of 0.500m and a mass of 3.75g . 1. What is the frequency f1 of the string's fundamental mode of vibration? 2. What ...
Question: A sump pump (used to drain water from the basement of houses built below the water table) is draining a flooded basement at the rate of 0.55 L/s, with an output pressure of 2.9 Ã- 105 N/m2. a) The water enters ...
Near the Earth's surface, a compact car of total mass M is driven on a large, revolving, horizontal, disk-shaped platform which itself rotates about its center at a fixed angular frequency ω. At t = 0, the driver leaves ...
The ball was thrown from 19.0 m height building. The Initial velocity is 39.2 M/S and it creates 30 degree angel with the horizontal surface.. Find the Max height the ball can reach, range and velocity before it hits the ...
Question: The potential energy U of an object of mass m that is separated by a distance R from an object of mass M is given by U = -GMm/R A. What is the kinetic energy K of the satellite? Express your answer in terms of ...
Question: Part A: How many different values of l are possible for an electron with principal quantum number n = 3? Express your answer as an integer. Part B: How many values of ml are possible for an electron with orbita ...
Question: The surface charge density on an infinite charged plane is - 1.70 x 10^-6 C/m^2 . A proton is shot straight away from the plane at 2.20 x 10^6m/s. How far does the proton travel before reaching it's turning poi ...
Question: The specific heat capacity of water is 4190 J/kg K, its heat of melting is 3.33 x 10^5 J/kg, and its heat of vaporization is 22.6 x 10^5 J/kg. For 1 kg of water, which of the following requires the most thermal ...
Question: The potential difference between the surface of a 3.2 cm -diameter power line and a point 1.5 mdistant is 4.7 kV. What is the magnitude of the line charge density on the power line? Express your answer using tw ...
Question: Pluto moves in a fairly elliptical orbit around the sun. Pluto's speed at its closest approach of 4.43Ã-109km is 6.12 km/s. Part A: What is Pluto's speed at the most distant point in its orbit, where it is 7.30 ...
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