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A soccer player kicks a rock horizontally off a 41.9 m high cliff into a pool of water. If the playerhears the sound of the splash 3.09 slater, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.
A bowling ball (mass = 7.2 kg, radius = 0.11 m) and a billiard ball (mass = 0.39 kg, radius = 0.028 m) may each be treated as uniform spheres
The speed of light in a certain medium is 2.2E10^8 m/s. What is the index of refraction of this medium
Kahlinium is an H-like atom consisting of an electron and the positive Casimir particle, what would be the wavelength of the first line of the Lyman emission series for this atom
A steel tube, which is closed at both ends, is filled with air. The air in the tube is vibrating at a frequency of 160·Hz. Use 340·m/s for the speed of sound in air. What is the wavelength of the sound waves in the tube
A conducting bar of length script l moves to the right on two frictionless rails, Explain the origin of the energy being delivered to the resistor
During a panic stop, a car decelerates at 7.00 m/s^2. What distance does the car travel in this time
An automatic dryer spins wet clothes at an angular speed of 4.2 rad/s. How long does it take the dryer to come up to speed
Light of a wavelength 450 nm is incident on a sodium emitter in a photoelectric effect apparatus. Sodium is 2.3 eV, What is the stopping potential for the emitted electrons
Two disks are rotating about the same axis. Disk A has a moment of inertia of 9.10 kg·m2 and an angular velocity of +8.10 rad/s. What is the moment of inertia of disk B
A magnetic field of 3 Tesla is oriented into the page. A 10 cm long conducting bar is pulled to the right at a constant speed of 3.4 m/s. What is the magnitude of the current in the bar
A man driving a car toward a large vertical wall sounds his horn. The car is traveling at 81 km/h. What is the frequency of the car's horn
A positively charged particle of mass 6.20 10-8 kg is traveling due east with a speed of 30 m/s and enters a 0.41 T uniform magnetic field. What is the magnitude of the charge of the particle
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