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What is the latitude of someone in the United States who sees the Sun at an altitude of 65.5° on December 22? Determine the month and day when the Sun is at maximum altitude for an observer in Washington, D.C. (39°N). What is the altitude of the Sun at this time?
A student holds a tuning fork oscillating at 256 Hz. He walks toward a wall at a constant speed of 1.20 m/s. What beat frequency does he observe between the tuning fork and its echo
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 96m long and your own ship to be 100 m long. How long does Maria measure your ship to be
a tortoise and hare start from rest and have a race. as the race begins both accelerate forward. the hare accelerates
A) How long would a trip from earth to a star 50 lightyears away take according to the ship observers if the ship is moving with a speed of 0.9 c?
The orbit of a Moon about its planet is approximately circular, with a mean radius of 4.87 × 10 8 m. Find the mean orbital speed of the Moon
Two parallel wires 10 cm apart carry currents of 18 A. What is the magnetic force between two wires for both cases
A skycam captured a video from directly overhead of an ice skater performing a spin. When viewed from above she was spinning counter-clockwise. If you watched this video, what direction would her angular velocity vector be pointing? (according the th..
find out the magnitude of force exerted on the lower end of the boom by the hinge.
A certain type of propeller blade can be modeled as a thin uniform bar 2.50m long and of mass 26.0kg that is free to rotate about a frictionless axle perpendicular to the bar at its midpoint. find the maximum angular acceleration the blade could ac..
you pull your t-shirt out of the washing machine and note that 1446 particles have become attached each of which could
Illustrate at what horizontal distance, x, from the base of the building will the rock strike the ground? Assume the ground is level and that the side of the building is vertical. The acceleration of gravity is 9.8 m/s2 .
White light is usually incident on two glass microscope slides with a thin layer of air of variable thickness among the slides, as seen in the figure below. Which wavelengths interfere constructively when reflected at a point where the air layer is 8..
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