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One lens of a nearsighted person's eyeglasses has a focal length of -21.7 cm, and the lens is 1.70 cm from the eye. If the person switches to contact lenses that are placed directly on the eye, what should be the focal length of the corresponding contact lens?
A man drags a table 4.30 m across the floor, exerting a constant force of 46.0 N, directed 29.0° above the horizontal. Find the work done by the applied force
A horse can maintain a top speed of 20m/s for a long distance but has a maximum acceleration of only 6.0m/s^2. how far does it run, to the nearest 10m
A 13 g bullet traveling 215m/s penetrates a 2 kg block of wood and emerges cleanly at 157m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after bullet emerges.
At a distance of 20m from a source of sound, the sound level is 40 dB. what will the sound level be
A nonconducting spherical shell, with an inner radius of 4 cm and an outer radius of 6 cm, has charge spread nonuniformly through its volume between its inner and outer surfaces. The volume charge density ? is the charge per unit volume, with the uni..
A bungee jumper with mass 52.0 kg reaches a speed of 13.5 m/s moving straight down when the elastic cord tied to her feet starts pulling her back up. find the average force that the bungee cord exerts on the jumper
Hello Since a prop-airplane can remain in horizontal flight indefinitely, why then, in the air shows, when the airplane is pointing vertically upward
An ethernet cable is 3.95 m long and has a mass of 0.190 kg. A transverse pulse is produced by plucking one end of the taut cable. evaluate the tension in the cable
An ideal monatomic gas at first has a temperature of 311K and a pressure of 7.57atm. It is to expand from volume 571 cm3 to volume 1390 cm3.
A thin double convex lens is to focus the image of an object onto a screen so that the image is life-sized. The lens has equal radii of 76 cm and the refractive index is n = 1.4. (a) What is the distance d from image to screen? (b) What is the total ..
The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is one-twentieth of an atmosphere. how far below the water can she swim
A 1200 car is moving on the freeway at 60.0 . What is the magnitude of its momentum in SI units? What is the magnitude of its kinetic energy in SI units. how much kinetic energy does it have
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