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A woman stands on a scale in a moving elevator. Her mass is 69.0 kg, and the combined mass of the elevator and scale is an additional 818 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9870 N. What does the scale read (in N) during the acceleration?
A steel beam that is 7.00m long weighs 330N. It rests on two supports, 3.00m apart, with equal amounts of beam extending from each end. Suki, who weighs 505 N, stands on the beam in the center and then walks toward one end. How close to the end can s..
A satellite with a mass of 250 kg moves in a circular orbit 7.00 multiply.gif 107 m above the Earth's surface. What is the gravitational force on the satellite
Pulsed lasers used in science and medicine produce very short bursts of electromagnetic energy. If the laser light wavelength is 1062 nm, How many wavelengths are found within the laser pulse
A camera is equipped with a lens with a focal length of 23 cm. how far from the film should the lens be placed
How much energy would be required to break a helium nucleus into its constituents, two protons and two neutrons? The rest masses of a proton
The silk has a density of 1300kg/m3. if you tap the branch and send a vibration down the thread how long does it take to reach the spider
A standing observer perceives a train whistle to have a frequency of 300 Hz. what is the frequency of the sound waves emitted from the train
Identical conducting spheres
A ring of charge is centered at the origin in the vertical direction, Find the total electric field, E, of the ring at the point P = (2.25 m, 0.00 m)
What is Kepler's First Law and in this experiment, there are eight pairs of photographs. In each pair, what things are the same in each? What things are different?
A block and a gun are firmly affixed to opposite ends of a long glider mounted on a frictionless air track. find the mass of the gun-glider-block system
the index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), what is the angle of refraction for each wavelength
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