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A 281 ball is tied to a string. It is pulled to an angle of 3.6 and released to swing as a pendulum. A student with a stopwatch finds that 26 oscillations take 18 .
How long is the string?
The eccentricity,e, of the Moon's orbit is 0.0549 and the mean orbital radius rL=(ab)^1/2 is 384,100 km. Calculate the lengths of the principal axes a and b of the Moon's orbit. How far is the center of Earth from the center of the elliptical orbit? ..
A hot air ballo0n is ascending straight up at a constant speedof 7.0 m/s. When the balloon is 12.0 m above the ground, How far above ground level are these places
A tank of water sits at the edge of a table of height 0.9 m. The tank springs a very small leak at its base, What is the water level h in the tank
initially a yoga ball is partially blown up and its surface area measured. afterwards it is filled completely and its
Two conductors insulated from each other are charged by transferring electrons from one conductor to the other. After 9.057 × 1013 have been transferred, the potential difference between the conductors is 16.8 V. The charge on an electron is −1.60218..
A 40ton rail car and a 80ton rail car, initially at rest, are connected together with a giant but massless compressed spring between them. When released, What is the speed of the 40ton car relative to the ground
A high-diver of mass 70 kg jumps off a board 10 m above the water. If, 2 s after entering the water his downward motion is stopped, what average upward force did the water exert on him
a passenger walks from one side of a ferry to the other as it approaches a dock. if the passengers velocity is 2.00 ms
An exoplanet with a mass of 5 times the mass of Jupiter and a radius of 2 Jupiter radii orbits a 3 solar mass star a distance of 10 AU from the star. estimate the orbital velocities of the star and the planet
a rubber ball dropped from a height of 2 bounces back to a height of 1. draw the balls position and velocity graphs
a helium-neon laser beam has a wavelength in air of 633 nm . it takes 1.38 ns for the light to travel through 30 cm of
A series AC circuit contains a resistor, an inductor of 230 mH, a capacitor of 4.30 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. obtain the phase angle between the current and the source voltage
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