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A man doing a slow push-up is approximately in static equilibrium. His body is horizontal, with his weight of 757 N supported by his hands and feet, which are 1.39 m apart. One hand rests on a spring scale, which reads 262 N. If each hand bears an equal weight, how far from the shoulders is the man's center of gravity?
Using a vernier caliper of least count 0.01 cm, the length of a cylinder is measured to be 3.76 cm, and its diameter 1.28 cm. Calculate the probable percent error in the volume
A parallel plate capacitor is made of two parallel disks of metal separaded by a gap. The radius of the disk is 2.0m, the distance between the plates .25m. What is the energy stored in the capacitor
Light of wavelength 560 nm illuminates a single 0.77 mm wide slit. At what distance from the slit should a screen be placed, What is the width of the central maximum
A "swing" ride at a carnival consists of chairs that are swung in a circle by 19.3 m cables attached to a vertical rotating pole, Find the speed of the chair
A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.16 s). what average force does the punter exert on the ball
What is an amplitude at a point where two pulses are crossing if the end at which reflection occurs is free to slide up and down.
a man stands on the roof of a building of height 16.1m and throws a rock with a velocity of magnitude 26.8 m/s, Calculate the maximum height above the roof reached by the rock
The Hale Telescope The 200-inch-diameter concave mirror of the Hale telescope on Mount Palomar has a focal length of 16.9, What is the magnification of her image
A flashlight on the bottom of a 4-m deep swimming pool sends a ray upward and at an angle so that the ray strikes the surface of the water 1.70-m from the point directly above the flashlight. What angle (in air) does the emerging ray make with wat..
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
A copper washer is to be fit in place over a steel bolt. Both pieces of metal are at 29.7°C. to what temperature must the washer be raised so it will fit over the bolt
A small, 300g cart is moving at 1.30m/s on an air track when it collides with a larger, 5.00kg cart at rest. What is the speed of the large cart after the collision
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