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To focus a camera on objects at dissimilar 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 =220.0 mm) is to be focused on an object located first at a distance of 3.5 m and then at 53.0 m. Over what distance should the lens be movable?
In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 56 m/s (around 130 mi/h) in a time of 7.2 s
A train accelerates at 2.97 m/s2 from rest to a steady speed in 34.27 s. What is the total distance traveled
Calculate the number of electrons in a steel iron pinhead. The pinhead may be assumed to be spherical with a diameter 2mm
A fully loaded, slow-moving freight elevator has a cab with a total mass of 1310 kg, which is required to travel upward 50 m in 3.4 min, starting and ending at rest. The elevator's counterweight has a mass of only 960 kg, and so the elevator motor mu..
consider children playing on a merry go around that is 6m in diamter turning at 10 revelutions per minute. what will
A uniform 1.3-kg rod that is 0.86 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
An electron is moved from point A to point B in a uniform electric field and gains 5.4010^-15 J of electrostatic potential energy. Calculate the magnitude of the electrostatic potential difference between the two points.
Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5m/s, What amount of mechanical energy is lost
A 2.80-kHz tone is being produced by a speaker with a diameter of0.240 m. The air temperature changes from 0 to27.1 oC. Assuming air to be an ideal gas, find the change in the diffraction angle
With cooperation acrobats in circular rotating cages that are attached to two beams in a shape of a cross (one cage attached to each end of the beam) can rotate the beams. Where does this energy come from
What is the horizontal distance the airplane engine falls. find out the time that was recorded on Earth.
You do 9.5J of work to stretch a spring with k=210N/m, starting with the spring unstretched. How far does the spring stretch
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