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An object is placed in front of a converging lens in such aposition that the lens (f = 13.6 cm) produces a real imagelocated 20.7 cm from the lens. Then, with the object remaining inplace, the lens is replaced with another converging lens(f = 19.4 cm). A new, real image is formed. What is the image distance of this new image?
The heat of vaporization of ethyl alcohol is about 200 cal/g. If 2.8kg of it were allowed to vaporize in the refrigerator, how many grams of ice would be formed from 0 °C water.
A uniform circular plate of radius 15 cm has a circular hole of radius 3 cm cut out of it. If the mass per unit area of material is 5 g/cm2, what is the mass of this object
A Ferris wheel with a radius of 14.0 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60 passenger when she is at the bottom of the wheel.
When jumping straight down, you can be seriously injured if you land stiff-legged. In a stiff-legged landing he comes to a halt in 4.59 ms. Find the magnitude of the average net force that acts on him during this time
A magnetic field has a magnitude of 0.0011 T, and an electric field has a magnitude of 3.6 × 103 N/C. Both fields point in the same direction. A positive 2.3-?C charge moves at a speed of 4.1 × 106 m/s in a direction that is perpendicular to both fie..
A capacitor can be made from two sheets of aluminum foil separated by a sheet of waxed paper. what is the capacitance of this capacitor
A horizontal force of 822 N is needed to drag a crate across a horizontal floor with the constant speed. You drag the crate using a rope held at an angle of 34° (from the horizontal).
Find the size of the net force produced by a 7 N and an 12 N force in each of the following arrangements. (a) The forces act in the same direction. N= (b) The forces act in opposite directions. N= (c) The forces act at right angles to each other. ..
The distance between the dipole and the point charge, by what factor would the force on the point charge due to the dipole change
You have a mechanism by which you can use a magnetic spectrograph to chose the energy of the beta rays from a 137Cs source. What thickness of the brass foils in g/cm2 does it take to stop the 0.8 MeV beta rays
A common flea that has a mass of 0.008 g can jump vertically as high as 19 cm. Estimate the wavelength for the flea immediately after takeoff
The sprint in spring gun has a force constant of 3.0 lb/in. It is compressed 1.5 in. from its natural lenght, with what speed will the ball leave the gun when released
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