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A man holds a double-sided spherical mirror so that he is looking directly into its convex surface, 41 cm from his face. The magnification of the image of his face is +0.35. What will be the image distance when he reverses the mirror (looking into its concave surface), maintaining the same distance between the mirror and his face? Be sure to include the algebraic sign with your answer.
A battery is connected in series with a 0.27-? resistor and an inductor, Find the inductance of the circuit
How many times, N, (in terms of R, L, M, μs, μk and g) will the block traverse the flat section? (A fractional answer for N is fine; it tells you where along L the block stops on its last trip.) Check that your answer makes sense if μk → 0.
A 9.5 μC charge is at x = 15 centimeter, y = 5 centimeter and a -3.2 μC charge is at x = 4.4 centimeter, y = 11 centimeter. Determine the force on the negative charge
A 970-g rock is whirled in a horizontal circle at the end of a 1.6-m-long string. If the breaking strength of the string is 100N, What's the minimum angle the string can make with the horizontal
consider two spheres with two masses and two charges. at a distance of 119.0 m the ratio of the electric force to the
A heat engine takes heat QH from a hot reservoir and uses part of this energy to perform work W. Assuming that QH cannot be changed, how can the efficiency of the engine be improved?
Two resistors are connected in a series to a 15V battery. The voltage drop across the first resistor is 3.5V, What is the resistance of the two resitors
A 0.360 kg pendulum bob passes through the lowest part of its path at a speed of 2.86 m/s, When the pendulum reaches its highest point, what angle does the cable make with the vertical
How long does it take the Sun to melt a block of ice at 0?C with a flat horizontal area 1.0 m2 and thickness 1.3cm
A parallel beam of light containing red (660 nm) and blue (470 nm) wavelengths goes from polystyrene to water, What is the angle between the two colors in water
a radio tower has a 64-foot shadow cast by the sun. if the angle from the tip of the shadow to the top of the tower is
An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train. When the engineer first sees the car, the locomotive is 130 m from the crossing and its speed is 17 m/s.
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