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A jet is circling an airport control tower at a distance of 18 km. An observer in the tower watches the jet cross in front of the moon. As seen from the tower, the moon subtends an angle of 0.00904 radians. Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon the other.
Standing on the surface of a small spherical moon whose radius is 5.71·104 m and whose mass is 6.71·1018 kg, an astronaut throws a rock of mass 1.85 kg straight upward with an initial speed of 28.5 m/s.
The tension in a 2.5-m-long, 1.2-cm-diameter steel cable (? = 7800 kg/m3) is 850 N. What is the fundamental frequency of vibration of the cable
In Anchorage, collisions of a vehicle with a moose are so common that they are referred to with the abbreviation MVC. What percent of the original kinetic energy is lost in the collision to other forms of energy
On July 15, 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere, How many hours does it take this satellite to make one orbit
A 1.5kg rock is whirled around in a flat circle at the end of an 85cm string. It has a linear speed of 1.80 m/s. What is the centripetal force that is acting on the rock
consider a state function which is a superposition of two lowest eigenfunctions of the infinite square well, that is \(\psi=1/\sqrt{a}cos\pix/2a + 2/\sqrt{a}sin\psix/a\), calculate the expectation value of the kinectic energy
A soap film in air has thickness L = 250 meters. It totally reflects orangle light with 620nm wavelength. What color and wavelength of light does it totally transmit
A boy 10.5 m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the instant the ball is thrown. How far from the tree will the dog catch the ball
Imagine removing one electron from every atom in a tiny cube of gold 1 mm on a side. (Never mind how you would hold the resulting positively charged cube together.) Do the same thing with another such cube a meter away.
A farsighted person has a near point of 50-cm from her eyes. She wants glasses that would let her see objects at a distance of only 25.00 cm from her eyes. Determine out the focal length of the glasses needed if the glasses are 2 cm and 3 cm from ..
Charge q is moving at constant speed v along the positive x-axis, Find the Cartesian components of the magnetic field at a point (x,y,z) for t > 0
A Styrofoam box has a surface area of 0.79 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, obtain the thermal conductivity of the Styrofoam
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