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A person stands on a scale inside an elevator at rest. The scale reads 800 N. The elevator accelerates upward at the rate of 2.4m/s2. What does the scale read then? Calculate answer to one decimal. ( use g = 9.8 m/s2 )
a transformer with 120 turns in its secondary supplies 12 volts at 220 ma to a toy train. the primary is connected
A stream of protons and electrons are shot horizontally (from the left edge of the page to the right) with a speed of 1.2 x 10^6 m/s, What is the radius of the curvature and the direction for the curvature that each of these particles undergoes
A pogo and rider of 80kg total mass at the high point of a 2.0m jump will drop 1.3m before the pogo plunger touches the ground, What approximate average force does the pogo stick exert on the ground during the landing
A piece of putty of mass m = 0.70 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. It collides by and sticks to a rod of length L = 0.98 m and mass M = 2.0 kg which pivots about a fixed vertical axis at the opposite end of the ..
A satellite in Earth orbit has a mass of 102 kg and is at an altitude of 2.10 106 m. (Assume that U = 0 as r ? ?.), What is the potential energy of the satellite-Earth system
A source of radio waves is emitted from the center of our galaxy 1.8 x 104 light years away. How much power do the radio waves carry
The objective of a refracting astronomical telescope has a focal length of 3.60 m. What is the angular magnification of the telescope
The equations below are approximations of the magnitude of theelectric field of an electric dipole, at points along the dipoleaxis. Consider a point P on that axis at distancez = 39.00d from the dipole center.
A toy submarine is in a swimming pool. The pool measures 50 meter long by 10 meter wide by 5 meter deep. Determine the force on window due to water pressure
To put it another way, what is the probability that a random K × K matrix has full rank
A ladder of unknown length and mass of 29.00 kg rests on a rough floor, and leans against a rough wall. The coefficient of static friction between the ladder and both the floor and wall are 0.68.
The purpose of this inquiry exercise is to determine the coefficients of static and kinetic friction for an object on a surface of your choice.
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