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Prior to launching a stone from a sling, a Bolivian native whirls the stone at 3.0 revolutions per second around a circle of radius 0.75 m. The mass of the stone is 0.15 kg. What is the angular momentum of the stone relative to the center of the circle? Draw a diagram showing the direction of motion and the direction of the angular momentum.
An astronomical telescope is designed with an overall magnification of 80x. The objective has a focal length of 98.0 cm. What should be the focal length of the eyepiece
A dentist's drill starts from rest. After 2.90 s of constant angular acceleration it turns at a rate of 2.0 multiply.gif 104 rev/min. Determine the angle (in radians) through which the drill rotates during this period
q1. an object falls because of gravity at a rate of -9.80 ms2 - sign is indicative of a downward direction for 10.00
A ball traveling with an initial momentum of 2.5 kg m/s bounces off a wall and comes back in opposite direction with a momentum of -2.5 kg m/s. What is the change in momentum of the ball
A car (m = 700.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 42.0 m. Find the average power the engine must deliver to reach a speed of 20.3 m/s at the top of the hill in 24.5 s
The temperature of a gold bar rises by 10.0°C when it absorbs 0.677 kJ of energy by heat. Determine the specific heat of gold
A guitar string is fixed between two points, 53.0cm apart. Its linear density is 12.0g/m. Now suppose the string is vibrating in its third harmonic. What is the distance between nodes
How long after the car passes point A does the radio experience a minimum in the net signal? suppose that the wavelength has the value found in part.
Two cars of 2000 kg each collide head-on while traveling at 75.0 miles per hour. What is the temperature increase of the cars
An object sits on a wheel 0.30 m from its axle. The wheel's rotational speed decreases from 4.0 rad/s to 2.0 rad/s in 5.0 s. determine the wheel's average rotational acceleration
A camera takes a perfectly exposed picture when the lens diaphragm is set to f/4 and the shutter speed is 1/250 s, what should the new shutter speed be so that the exposure is still correct
A car accelerates from rest to a kinetic energy of 2.06 x 105 J in a distance of 638 m. How much force did the car's engine deliver to produce this acceleration.
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