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On the Vernal Equinox at noon, what is the hour angle of a star with a right ascension of 2 hours?
On the summer solstice at midnight, what is the hour angle of a star with a right ascension of 22 hours?
A star is on the observer's meridian. What is its hour angle?
A star is on the celestial equator and the eastern horizon. What is its hour angle?
A teeter-totter is made of a 3.200 m long plank with a mass of 60.0 kg, what mass must be placed at the left end so that the teeter-totter is balanced
A crown glass lens (n = 1.52) has an optical power of 4.0 d in air. What is its power in carbon tetrachloride (n = 1.461)
A lead ball is dropped into a lake from a diving board 5.0 mabove the water. How deep is the lake
Suppose an initial speed of 21.4 m/s, at an angle of 61.10° with respect to the positive x axis. Find the velocity at time t0; enter x component, after that the y component.
What is the time of oscillation of block
In the quark model of fundamental particles, a proton is composed of three quarks: two "up" quarks, each having charge +2e/3, calculate the potential energy of the subsystem of two "up" quarks
a golf ball is released from rest from the top of a very tall building. neglecting air resistance calculatea the
Three identical resistors with resistances of 6.0W are connected to a batter with an emf of 18.0V and zero internal resistance. Find the equivalent resistance of the resistor network
You walk west 240m and then north 150m. What is the magnitude of your displacement vector
a soccer player takes a penalty kick 11.0m from goal. to score she has to shoot the ball under the 2.44m high cross
A cardboard tube of radius R and length L has a uniform charge density on its surface. Find the potential at a point on the axis of the tube at a distance d from the center.
The Yerkes telescope in southern Wisconsin is the largest refracting telescope in the world. Its objective lens is 40 inches (slightly over a meter) in diameter. What are the focal lengths of the two lenses
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