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A coin is located 27.9 cm to the left of a converging lens (f = 20.0 cm). A second, identical lens is placed to the right of the first lens, such that the image formed by the combination has the same size and orientation as the original coin. Find the separation between the lenses.
Two identical pith balls are hung by insulating strings, touching each other, as in the picture below. The mass of each ball is 0.002kg. Determine the charge on each ball
A starship blasts past the earth at 2.0\times 10^8\;{\rm{ {\rm m}/{\rm s}}}. With what speed does the laser beam approach the earth
A large block of copper initially at 20.0oC is placed in vat of hot water (80.0oC). For the first 1.0 J of heat that flows from the water into the block, find the entropy change of the water
A marble (radius 1.5 cm and mass 5.0 g) rolls without slipping down a ramp of vertical height 26 cm. What is the speed of the marble
A 3-ft-diameter semicircular channel made of unfinished concrete is to transport water to a distance of 1-m uniformly. determine the minimum elevation difference across the channel
An individual is running around a turn with an 11 m radius at 3.75 m/s. What is the runner's centripetal acceleration
The two stars in a binary star system have masses 2.2x10^30kg and 5.9x10^30kg. They are separated by 1.8x10^12m. What is the speed of the lightest star
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s.
A 1.6-cm-tall object is 30cm to the left of a lens with a focal length of 15cm . A second lens with a focal length of 42cm is 58cm to the right of the first lens, Calculate the image height
A high-speed lifting mechanism supports a 780-kg object with a steel cable that is 33.0 m long and 4.00 cm2 in cross-sectional area. Determine the elongation of the cable
A block of mass M is held motionless on a frictionless inclined plane by means of a string attached to a vertical wall as shown in the diagram.what is the magnitude of the tension t in string.
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
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