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A nearsighted person has a far point located only 521 cm from the eye. Assuming the eyeglasses are worn 2 cm in front of the eye, find the focal length needed for the diverging lenses of the glasses so the person can see distant objects.
a fighter pilot sits on a bathroom scale in her cockpit as she moves in a straight and level flight at 200 ms. the
A plant makes liquid CO2 by treating dolomitric limestone with commercial sulfuric acid. Calculate pounds of acid used per ton of dolomite treated
A slingshot will shoot a 10-g pebble 22.0 m straight up. With the same potential energy stored in the rubber band, how high can the slingshot shoot a 25- pebble
A 35kg child is standing on the outer edge of a merry-go-round that has moment of inertia 847 kg*m^2 and radius 2.40 m. The entire system is initially rotating at 0.180 rev/s. Discover the angular velocity if the child moves to a final position 1.10 ..
Two equal-mass stars maintain a constant distance apart of 4.8E10 m and rotate about the point midway among them. They make one revolution every 2.6 yr. What is the mass (in kg) of each star?
Three identical particles, q1, q2, and q3, each with charge q = 5.00 μC , are placed along a circle of radius r = 2.00 m at angles 90, 180, and 270 degrees from the positive x axis, respectively. What is the resultant electric field at the center ..
2 kg block slides on a rough horizontal surface. the block hits a spring with a speed of 2.4 m/s and compresses it a distance of 11 cm before coming to rest. what is the force constant of the spring
A 50.6-cm diameter disk rotates with a constant angular acceleration of 2.10 rad/s2. Find the linear velocity and tangential acceleration
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = ?28.0 cm). How far is the object from the converging lens
A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on over..
A "75 Watt" light bulb uses an average power of 75 W when connected to an rms voltage of 120V. what is the maximum current in the light bulb
q. a hot wheels track has a spring loaded launcher. a 100g car is pushed into the launcher which compresses the spring
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