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A piece of thin spherical shell that has a radius of curvature of 92 cm is silvered on both sides. The concave side of the piece forms a real image 69 cm from the mirror. The piece is then turned around so that its convex side faces the object. The piece is moved so that the image is now 35 cm from the piece on the concave side.
(a) How far was the mirror moved?
cm (b) Was it moved toward or away from the object?
You are to build a box whose height is 0.280 times its length. what should be the ratio of the width of the box to its length
A wheel is rotating about an axis that is in the z-direction. The angular velocity is w = ?6.00 rad/s at t = 0, What is the angular displacement (change in angle) of the wheel at t = 7.00s
Hurricane winds of 95 m/h are blowing over the flat roof of a well sealed house. What is the difference in air pressure between the inside and outside of the house
Two spherical objects have a combined mass of 200. The gravitational attraction between them is 8.01×10-6 while their centers are 21.0 apart.
A viewing window in the Atlanta aquarium is 67 inches wide and 43 inches high. what is the outward force on the window
The voltage drop along a 30.0m segment of a power line made from copper wire (a very good conductor) is 1.2V, while carrying a current of 25.0 A. How large is the electric field along the wire
A transformer takes 120V (RMS) from a household circuit and drops it to supply a secondary circuit at 8V (RMS) to power a dorbell at 3.75A (RMS). What is the peak current in the primary coil of the transformer
A cube of ice is taken from the freezer at -8.4 and placed in a 104 aluminium calorimeter filled with 322 of water at room temperature of 20. The final situation is observed to be all water at 17.
A 150 kg rock (density is 2500 kg/m 3 ) is dropped to a lake. Determine how much force the man needs to life the rock from the bottom of the lake
A 96 kg person stands on a scale in an elevator. What is the apparent weight when the elevator is accelerating upward with an acceleration of 1.80 m/s^2.
It was a dark and stormy night, when suddenly you saw a flash of lightning. Three-and-a-half seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightning bolt?
what is the mass of helium in the balloon.
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