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A person whose eyes are 1.7 m above the floor stands in frontof a plane mirror. The top of her head is 0.14 m above her eyes.
(a) What is the height of the shortest mirror in which shecan see her entire image?
(b) How far above the floor shouldthe bottom edge of the mirror be placed?
A transformer is to be used to provide powerfor a computer disk drive that needs 6.4 V (rms) instead of the 120V (rms) from the wall outlet. Find the number of turns in the secondary
A rocket moves upward, starting from rest with an acceleration of 29.9 m/s2 for 3.31 s. It runs out of fuel at the end of the 3.31 s but does not stop. Evaluate how high does it rise above the ground?
A polar explorer pulls a sled on dry snow (the coefficient of kinetic friction is 0.12 for sled on snow). The rope attached to the sled pulls at an angle of 9° above the horizontal and the explorer pulls with with 600 N of force. The sled has a to..
assume the roller coaster (h1 = 32 m, h2 = 11 m, h3 = 20) passes point A with a speed of 3.50 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point B? The distance traveled is 30m.
q1. an alpha particle helium nucleus is travelling along the positive x-axis at 1250 ms when it enters a cylindrical
a positron emission tomography scanner examines the gamma rays emitted when positrons and electrons annihilate each other. What is the wavelenth of the photons
A simple pendulum, 2.0 m in length, is released with a pushwhen the support string is at an angle of 25 from the vertical. what is its speed at the bottom of the swing
An irregularly shaped chunk of concrete has a hollow spherical cavity inside. The mass of the chunk is 41.5 kg, What is the radius of the spherical cavity
If a simple pendulum with length 1.50 meters makes one oscillation in 2.497 seconds, what is the acceleration due to gravity at its location
A person sitting quietly in a room on a winter day may lose heat primarily by radiation from the outer surface of her clothes to the walls of the room. what is the temperature of the outer surface of the clothes
An electron moving along the x axis has a position given by x = 20te-4t m, where t is in seconds. How far is the electron from the origin when it momentarily stops
A small block with a mass of 0.120kg is attached to a cord passing through a hole in a frictionless, horizontal surface. The block is originally revolving at a distance of 0.50 m from the hole with a speed of 0.70m/s. The cord is then pulled from ..
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