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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 = 190.0 mm) is to be focused on an object located first at a distance of 3.5 m and then at 47.0 m. Over what distance must the lens be movable?
The average distance of the planet Mercury from the sun is 0.39 times the average distance of the earth from the sun. How long is a year on Mercury in units of earth years
a box of mass 1.0 kg sits atop a frictionless surface inclined at 30 degree above the horizontal.nbsp it is connected
The coil in a 60-Hz ac generator has 125 turns, each having an area of 3.0*10^-2 m^2, What is the RMS output voltage
A freight train has a mass of 2 multiplied by 107-kg. If the locomotive can exert a constant pull of 12.50 multiplied by 105-N, how long would it take to enhancement the speed of the train from rest to 85.00 km/h.
A copper wire has a resistance of 29 ? at 19° C. An aluminum wire has three times the length and two times the radius of the copper wire. What is the resistance of the aluminum wire at 19° C
The position of an object connected to a spring varies with time according to the expression x = (5.9 cm) sin(8.7?t). (a) Find the period of this motion. s (b) Find the frequency of the motion. Hz (c) Find the amplitude of the motion. cm (d) Find the..
Determine the rebound angle ? if the coefficient of restitution for the impact of the ball with the floor is 0.4.
A vertical scale on a spring balance reads from 0 to 225. The scale has the length of 11.5 from the 0 to 225 reading. A fish hanging from the bottom of the spring oscillates perpendicularly at a frequency of 3. Ignore the mass of the spring, what ..
A thin rod of length 0.80 m and mass 210 g is suspended freely from one end. find the rod's kinetic energy at its lowest position
An atom is ionized so that it has only one electron. When the electron drops from the n = 4 shell to the n = 1 shell, What is the atomic number
A child knocks a 1.2 kg vase off of a table 1.5 m above the ground. What impulse did the floor exert on the vase
A uniform steel bar swings from a pivot at one end with a period of 1.3s. How long is the bar
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