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A man stands on the roof of a building of height 15.9 and throws a rock with a velocity of magnitude 29.5 at an angle of 26.1 above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. Calculate the magnitude of the velocity of the rock just before it strikes the ground.
What is the magnitude of the magnetic forces on each of three sides?
What is the maximum load that could be suspended from a copper wire of length 1.0 m and radius 1.0 mm without breaking the wire? Copperhas an elastic limit of 2.0 x 10^8 Pa and a tensile strength of 4.0 x 10^8 Pa.
A monochromatic light source emits a wavelength of 490 nm in air. When passing through a liquid, What is the liquid's index of refraction
The distance from the human eye lens system and the retina is typically 19.0 mm. What is the focal length of the eye lens system for a relaxed eye
An LED’s color is determined by the energy needed to shift an electron across the band gap in the semiconductor from which the LED is made. Because blue photons have more energy than green photons, the development of blue LEDs has been slow. The mate..
On a clear day the electric ?eld in the atmosphere near the earth's surface is 100 N/C, What is the potential at the top of a man's head if the man is 2 m tall and is standing
Gas in a container is at a pressure of 1.1 atm and a volume of 8.0 m3. What is the work done by the gas if (a) it expands at constant pressure to twice its initial volume
A 11.9-m-long wire of mass 132g is stretched under a tension of 250N . A pulse is generated at one end, Where will the two pulses first meet
An 80 kg skydiver falls through air with a density of 1.15 kg/m3 . Assume that his drag coefficient is C=0.57. What are the terminal speeds in both cases
A long, straight wire generates a magnetic field of 0.3 T a distance of 0.05m away from it. What is the current in the wire
An athlete crosses a 28 m-wide river by swimming perpendicular to the water current at a speed of 0.8 m/s relative to the water, How fast is the water in the river flowing with respect to the ground in m/s
A pitcher claims he can throw a 0.160-kg baseball with as much momentum as a 2.50-g bullet moving with a speed of 1.50 103 m/s
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