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A man holds a double-sided spherical mirror so that he is looking directly into its convex surface, 40.8 cm from his face. The magnification of the image of his face is +0.21. 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 (+ or ?) with your answer.
The temperature near the top of Saturn's cloud layer is about 110K. The temperature at the top of earth's troposphere, at an altitude of about 20km, is about 220K. Calculate the rms speed of hydrogen molecules in both these environments
You are piloting a small plane that can maintain an air speed of 136.5 kt (knots, or nautical miles per hour) and you want to fly due north (azimuth = 000°) relative to the ground.
An object-spring system oscillates with an amplitude of 3.4 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, obtain the maximum acceleration of the object
A child and an adult are walking. Their legs swing like physical pendulums and both swing through the same maximum angle. what is the walking speed of the child
Frames S and S' are moving relative to each other along the x and x' axes. They set their clocks to t = t' = 0 when their origins coincide, Compute the spacetime interval ?s between the events
The spring is kept from pushing them apart, since they are holding each other. When they release their arms, Al moves off in one direction at a speed of 1.16m/s, while Jo moves off in the opposite direction at a speed of 0.973m/s. Assume that frictio..
In the days of horse-drawn wagons, iron tires used to be placed on wooden wagon wheels by heating the iron rims, what diameter will the tire have when it is heated to 680 oC
An empty hollow metal shell containing vacuum has a total charge of 3C on its outer surface. What is the total charge on the outer surface once this has happened
Two identical guitar strings are prepared such that they have the same length (1.91 m) and are under the same amount of tension. compute the wave propagation speed on the guitar strings
A sheet of an unknown material that is 1.223 +/-.003 micrometers thick is suspended in air. What is the index of refraction of the material
A rightward force of 15 N is applied 35 degrees above the horizontal to a 6 kg box to move it across a rough surface. Calculate the acceleration of the object
A closely wound, circular coil with radius 2.10cm has 830 turns. What must the current in the coil be if the magnetic field at the center of the coil is 5.00×10?2
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