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To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, so a sharp image always falls on the film. A camera with a telephoto lens (f = 185 millimeter) is to be focused on an object placed first at a distance of 3.5 meter and then at 47 meter. Obtain over what distance must the lens be movable?
Two identical particles of mass m approach each other at equal and opposite speeds, v. How much kinetic energy was lost in this collision
a proton accelerates from rest in a uniform electric field of 624 nc. at some later time its speed is 1.04 106 ms.a
Kelli weighs 405 N, and she is sitting on the playground swing that hangs 0.43 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.00 m above the ground. suppose that air resistance is negligible.
A lens of focal length 15.0 cm is used to create an image of the Full Moon. What is diameter of the image? The Moon's radius and average distance from Earth are 1.74× 106m and 3.85× 108 m, respectively
A23 kg child jumps onto the rim of a140 kg rotating disk of radius1.4 m. what is the angular speed of the disk-child system
The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. find the magnitude of the charge placed on each body
A small coil with N_2 loops each of area A_2, is placed inside a long solenoid, near its center. Determine the mutual inductance as a function of theta, the angle of the plane between a small coil and the axis of the solenoid
A current of 0.300 A through your chest can send your heart intofibrillation, how many conduction electrons pass through your heart
A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.66 of the person's regular weight. Calculate the acceleration of the elevator
A conductor bar ab of length 0.6 m is moving on two conductin grails with a speed v = 3.6 m/s perpendicular to a uniform magneticfield of B=0.35 T.
A block with a mass of 15killogram is held stationary by a cord on a frictionless plane that is inclined at an angle θ=27 degree. find the acceleration of the block as it slides down the inclined plane
Consider the record throws for the javelin, men 98.48 m (Zelezny, 1996, 0.800 kg) and women 72.28 m (Spotakova, 2008, 0.600 kg); discus, men 74.08 m (Schult, 1986, 2.00 kg) and women 76.80 m (Rensch, 1989, 1.00 kg); and shotput, men 23.12 m (Barne..
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