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Q. A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = 38.8 cm. Precisely 35.7 cm behind this lens is a concave lens with a focal length f2 = -10.3 cm. The object to be photographed is 3.97 m in front of the objective lens.
a)How far behind the concave lens should the film be placed?
b)What is the linear magnification of this lens combination?
Fred and Barney are two electric charges that are initially held 1 meter apart and experience an electric repulsion of 10 pounds of force. What would be the force of repulsion between them be if the two were moved closer together so that they were..
An electric field is set up between two parallel plates, each of area 2.2 m2, by putting 1.0 C charge on one plate and the -1.0 C charge on the other. The plates are separated by 4.0 mm. What is the magnitude of the electric field between the plates ..
290 Kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40.
A simple harmonic oscillator consists of a block of mass 2.2kg attached to a spring of spring constant 26N/m. When t = 1.60 s, the position and velocity of the block are x = 0.128m and v = 3.170 m/s. (a) What is the amplitude of the oscillations? ..
A plane leaves the airport in Galisto and flies 159km 68 degrees east of north and after that changes direction to fly 242km at 48 degrees south of east, after which it makes an immediate emergency landing in a pasture.
The yellow light from a helium discharge tube has a wavelength of 587.50. When this light illuminates a certain diffraction grating it produces a first-order principal maximum at an angle of 1.050.
An unstretched spring with spring constant 21 N/cm is suspended from the ceiling. A 3.3 kg mass is attached to the spring and let fall. To the nearest tenth of the centimeter, how far does it stretch the spring.
What must be the temperature of the cold reservoir in order to increase the efficiency to 29.0%
A 5.2 x10^2-newton girl takes 10. Seconds to run up two flights of stairs to a landing, a total of 5.0 meters vertically above her starting point. What power does the girl develop during her run.
The vector is 3.5 long and is directed into this page. Vector points from the lower-right corner of this page to the upper-left corner of this page and has components -19.5, 25.
What is the frequency of up and down oscillations of the wheel? Regard wheel as a mass on one end of a spring and regard the body of the car as a fixed support for the other end of the spring.
The distance between two telephone poles is 55.55 m. When a 1.00 kg bird lands on the telephone wire midway between the poles, the wire sags 0.165 m. illustrate a free-body diagram of the bird.
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