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Solve the given question:
Kim says that she was less than 10 ft away from the president when she took a picture of him with her 43-mm focal length camera lens. The picture shows the upper half of the president's body (or 3.3 ft of his total height). On the negative of the film, this part of his body is 18 mm high. How close was Kim to the president when she took the picture?
(In ft)
Show all work, use additional paper if necessary.
Two small metal balls, carrying a charge +Q, are lying on an insulating surface a distance D apart. On either side of the two balls are small metal posts that are fixed to the surface. The distance between the posts and the balls is also D. The dimen..
Earth-Moon Center of Mass The Earth has a mass of 5.98×1024kg, the Moon has a mass of 7.35×1022kg, How far from the center of the Earth is the Earth-Moon center of mass
FM radio stations use radio waves with frequencies from 88.0 to 108 MHz to broadcast their signals. Assuming that the inductance in the figure has a value of 7.50 10-7 H, determine the range of capacitance values that are needed so the antenna can..
Suppose a capacitor in a video camera has a capacitance of 26.0 ?F, how much potential energy is stored in the capacitor
The transformer on a utility pole steps the voltage down from 10000 V to 220 V for use in a college science building. At what rate is heat lost in the nonideal transformer
a 17.0-g piece of styrofoam carries a net charge of -0.75 microc and is suspended in equilibrium above the center of a
A student is pushing a crate up a 20 degree incline. Find the magnitude of the normal force between crate and incline
An x-ray tube is operated at 48200 V. Calculate the minimum wavelength of the radiation emitted by this tube
two strings with linear densities of pullyes and attached to hanging blocks. both strings have same frequency what is
A wooden board is 2.0 m long and has a mass of 10 kg. Thisboard is supported at each end by cement blocks A and B. Calculate the force of the board on cement block A and on cement block B
How long would it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 324.
A battery has an internal resistance of 0.75 ohm and an emf of 9 V. It is placed a cross a 5 ohm resistor and a 10 uF capacitor hooked up in parallel. a) after the capacitor has charged, what is the current through the resistor? b) what is the charge..
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