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An ice skater rotating 3.85 rad/s with arms extended has a moment of inertia of 2.31 kg*m^2. If the arms are pulled in so the moment of inertia decreases to 1.15 kg*m^2, what is the final angular speed?
A charge of 27.0nC is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×104 N/C. What work is done by the electric force
Two sinusoidal waves of the same frequency travel in the same direction along a string. what is the amplitude (in cm) of the resultant wave
Visible light passes through a diffraction grating that has 900 slits per centimeter, What is the difference between these wavelengths
An athlete competing in long jump leaves the ground with a speed of 9.14 m/s at an angle of 35.0 ° above the horizontal
a base for a building column measures 18.0 in. by 18.0 in. on a side and 12 in. high. compute the cross-sectional area
question1submarine when at rest underwater uses a sonar device that sends 20 khz sound pulses downward from bottom of
If the mass of both weights is 150 gm, the first mass is located 30 north of east, the second mass is located 30 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? Suppose the transducer h..
An electric ceiling fan with blades of diameter 0.760m is rotating about a fixed axis with an initial angular velocity of 0.200 rev/s. What is the tangential speed of a point on the tip of the blade
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1000 Hz. What is the speed of the bird
A lens has diameter of 30 mm, What is the lens' theoretical resolution limit (in nm) when it is used in air with light of 550-nm wavelength
what is the minimum coefficient of static friction required between tires and race track if the car is to stay on the track at a speed of 130m/s.
A 150-? resistor is connected in series with a 0.250-H inductor. The voltage across the resistor is vR=(3.80V)cos[(720rad/s)t]. Derive an expression for the circuit current
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