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A porpoise jumps straight up and crashes back into the water at 8.9 m/s. The drag and buoyancy forces of the water slow the porpoise down with an acceleration of -9.3 m/s2? ?as the porpoise finally slows to a stop. Find the depth the porpoise reaches.
A painter weighing 630 N climbs to a height of 5.0 m on a ladder. How much work does it take? What is the increase in the potential energy
Two children use a homemadetelephone consisting of two paper cups connected by an aluminumwire which is 8.4 m long, find the time for the sound to travel from one cup to the other
Suppose you have two boxes that conceal what is inside, althougheach has two wires coming out of the interior. You have atyour disposal some batteries, wire and identical flash tlight bulbs.
Consider a pair of wave functions, Ψ1 and Ψ2 that are orthonormal. Show that Ψ3 = Ψ1 + Ψ2 and Ψ4 = Ψ1 - Ψ2 can also be normalized, and that Ψ3 and Ψ4 are orthogonal to each other
In the ground state of hydrogen, the uncertainty in the position of the electron is roughly 0.10 nm. If the speed of the electron is on the order of the uncertainty in the speed, how fast is the electron moving?
Kim says that she was less than 10 ft away from the president when she took a picture of him with her 45-mm focal length camera lens. How close was Kim to the president when she took the picture
An air puck of mass 0.20 kg is tied to a string and allowed to revolve in a circle of radius 0.9 m on a frictionless horizontal table. What is the speed of the puck
Consider a Resistor and inductor circuit connected to a generator, Vmax is given, frequency is given, L is given R is given. Find the power
A 405 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 2.7 meters. What is the speed of sound in the substance
A box of mass m slides across a horizontal table with coefficient of friction ? . Find the acceleration of the system
A 310 kg weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 28.0 m/s2 for 32.0 s, and then runs out of fuel. Overlook any air resistance effects.
Two Earth satellites, A and B, each of mass m, are to be launched into circular orbits about Earth's center. Find the ratio of the potential energy of satellite B to that of satellite A, in orbit
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