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An 80 kilogram man is standing in an elevator on a "bathroom scale" which reads weight. The elevator is moving downward at a speed of 3 m/s. During a 2 sec period the elevator slows down and stops. During these 2 sec, find what weight does the man read on the scale?
A solar cell, 3.0cm square, has an output of 350mA at 0.80V when exposed to full sunlight. How many cells do you need to build the panel
The diet of a 60 kg person provides 12,000 kJ daily. Ifthis amount of energy were added to 60 kg of water, by how much would its temperature increase
two balls of radius 2.00 mm have a separation between their centers of 5.33 cm. the same electric charge is placed on
A constant 80-N force acts on a 5.0 kg box. The box initially is moving at 20 m/s in the direction of the force, Determine both the work done by this force
A person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the deceleration does not surpass 27.0 "g's"(1.00 g= 9.80m/s2).
Nitrogen and oxygen in their liquid states have densities only 0.80 and 0.90 that of water. Atmospheric pressure is due primarily to weight of nitrogen and oxygen gas in the air. If atmosphere liquefied would its depth be greater or less than 10.30 m..
A simple generator is used to generate a peak output voltageof 24.0 V. How many loops of wire should be wound on the square armature
An electron is accelerated from rest by a potential difference of350V. It then enters a uniform magnetic field of magnitude 200mTwith its velocity perpendicular to the field.
A ball thrown horizontally at 23 m/s travels a horizontal distance of 55 m before hitting the ground. From what height was the ball thrown
A block has a mass of 1.20 kg and is attached to a spring with spring constant of 5.00 N/m. How many oscillations is made by the block by that time
a red laser pointer with a wavelength of 635 nm is shined on a double slit producing a diffraction pattern on a screen
A railroad car of mass 2.44 104 kg, is moving with a speed of 3.96 m/s. It collides and couples with three other coupled railroad cars, What is the speed of the four cars after the collision
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