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Q1. A charge of 28.0 {rm nC} is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×104 N/C. What work is completed by the electric force when the charge moves?
Q2. An observer, whose eyes are 1.99 m above the ground, is standing 35.0 m away from a tree. The ground is level, and the tree is growing perpendicular to it. The observer's line of sight with the treetop makes an angle of 23.0° above the horizontal. How tall is the tree?
The spin cycles of a washing machine have two angular speeds, 450rev/min and 623rev/min . The internal diameter of the drum is 0.570m, Find the laundry's maximum tangential speed
You illuminate a slit of width 0.0643 mm with light of wavelength 711 nm, What is the width, in centimeters, of the pattern\'s central maximum
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. find the magnitude of the tension in the wire
A golf ball strikes a hard, smooth floor at an angle of 30 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impuls..
questionyou are standing 0.75 m from your bathroom mirror in morning. how far away is your image from you? answer is
A fission-based nuclear bomb (such as those used in World War II) uses the same nuclear reactions, What is the average power Pavg of such a nuclear bomb
carries a 10 A current with a uniform current density. Use Ampere's Law to determine the magnetic field strength at the axis of the wire
A 70kg man walks out on a 10kg beam that rests on, but is not attached to, two supports. When beam just starts to tip, what is the force exerted on the beam by the right support.
An electron beam contains electrons that move along the +x-axis at 0.020c. The beam enters a region of length 1.0 m and runs parallel to a wire that carries a 0.20-A current in the +x-direction.
how come the formula: (change)v / (change)t = (change)x cannot be used for this exercise When a 58-g tennis ball is served, What is the magnitude of the net force acting on the ball
A uniform steel plate has an area of 0.905 m2. When subjected to a temperature difference between its sides, a heat current* of 22.5 kW is found to flow through it. What is the temperature gradient? What is the temperature difference when the plat..
A lab team rides a ski lift to the top of the mountain, due to some congestion their ears fail to pop, that is the pressure inside the ear does not equalize with the outside atmosphere. Calculate the force on the eardrum
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