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What is the angular momentum of a 0.270 kg ball rotating on the end of a thin string in a circle of radius 1.40 m at an angular speed of 7.30 rad/s?
The radius of the Sun is 6.95 × 108 m. It radiates heat at the rate of 5.42 × 1026 W. Assuming that it is a perfect emitter, what is the temperature of the surface of the Sun
A 150 g baseball is pitched at 50 m/s and is hit straight back at the pitcher at a speed of 60 m/s. What is the magnitude of the average force on the ball
q1. the length of an air column that produces a strong resonance in a cylinder is 0.18m what is the frequency of the
A reflecting, spherical Christmas tree ornament has a diameter of 20 cm. A child looks at the ornament from a distance of 40 cm. define the image she sees. Where is the image locate.
A small ball rolls horizontally off the edge of a tabletop of height h, How long is the ball in the air and What is its speed at the instant it leaves the table
Four identical charges (+4.0 µCeach) are brought from infinity and fixed to a straight line. The charges are located 0.20 m apart. Determine the electric potential energy of this group.
The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x10-11 m. Find the magnitude of the electric force.
A ball is thrown straight up in the presence of gravity and quadratic air resistance (frictional force = -cv^2v~). Find the velocity as a function of height
A horizontal beam of electrons initially moving at 4.1 107 m/s is deflected vertically by the vertical electric field between oppositely charged parallel plates.
a magnifying glass creates a virtual image of the observed object. explain how it is possible that humans can see the
What is the reactance of a 8.2×10?2?F capacitor connected to a 19kV (rms), 540Hz line? Determine the frequency and the peak value of the current
A catapult on a cliff launches a large round rock towards a ship on the ocean below. calculate the speed at which the rock is launched
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