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A magician wishes to create the illusion of a 2.17-m-tall elephant. He plans to do this by forming a virtual image of a 57.0 cm tall model elephant with the help of a spherical mirror. If the model must be placed 3.00 m from the mirror, what radius of curvature is needed? (Include the sign of each answer.)
q1. in brief explain the changes that the sun will go through after it exhausts its core hydrogen. be sure to describe
A construction worker with a weight of 820N stands on a roof that is sloped at 16 degrees. find the magnitude of the normal force of the roof on the worker
A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail, what is the diameter of the nail
A man sitting in a bosun's chair that dangles from a massless rope, which runs over a massless, frictionless pulley and back down to the man's hand. The combined mass of the man and chair is 86 kg. With what force magnitude should the man pull on ..
At time t = 0 s, a wheel has an angular displacement of zero radians and an angular velocity of +15 ras/s. The wheel has a constant acceleration of -0.45 rad/s2. In this situation, the maximum value of the angular displacement, in rad, is closest to:
1. you are hired by an industry that owns a building with a floor area of 6 m by 10 m and a ceiling height of 4 m. the
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What is the time needed to take off
A four-turn circular wire coil of radius 0.565 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.340 T. what is the average induced emf in the wire during this time
a 90 ohm resistor has a current of .6A and is connect in series with a 150 ohm resistor. What is the emf of the battery to which the resistors are connected
The C note of the C-major scale on a piano has a fundamental frequency of 264Hz, and the A note has a fundamental frequency of 440Hz. determine the ration of tension in the two string
A 2,493-kg car is moving down a road with a slope (grade) of 14% at a constant speed of 13 m/s. What is the direction and magnitude of the frictional force?
A 150-kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1680 N, Find the acceleration of the rocket
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