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Lithium is a light metallic element whose ions are used in highly efficient batteries for portable laptop computers. Each lithium ion(Li+) contains two electrons and three protons. Suppose a lithiumion is surrounded by a Gaussian surface. Is the flux through thesurface positive, negative, or zero?
a total of 25 rm kg of bananas on their way to the market. Assume that the springs have somehow not yet compressed to their maximum amount. Explain how much are the springs compressed?
A merry-go-round is spinning and has a period of 7.25 s. A boy jumps off in a direction parallel to the radius, what is the new period of the merry-go-round
What is the terminal speed for an 84.00 skier going down a 38.0 degree snow-covered slope on wooden skis = 0.06? Assume the skier is 1.70 m tall and 0.500 m wide.
A 15.0-g metal cylinder is placed on a turntable, with its center 74 cm from the turntable's center. The coefficient of static friction between the cylinder and the turntable's surface is ?s = 0.74. A thin, massless string of length 74 cm connects..
A 430 gram rock is whirled on the end of a string 45 cm long which will break under a tension of 22 N. What is the highest speed the rock can reach before the string breaks? (Neglect gravity.)
A small solid ball is released from rest while fully submerged in a liquid and then its kinetic energy is measured when it has moved 5 cm in the liquid. What is the volume of the ball
A ball rolling down an incline travels 6 cm in the first .25 seconds, and 24 cm in the first .50 seconds. find the average speed for the second quarter second time interval
in its daily prow of the neighborhood a cat makes a displacement of 100m due north followed by an 80m displacement east. what is the magnitude and direction of the velocity
A piñata of mass 3.30 kg is attached to a string tied to a hook in the ceiling. What is the work done by gravity by the time the string is in a vertical position for the first time
A friend is standing on a giant skateboard that is initially at rest. If you avoid frictional effects with the floor, what is the momentum of the skateboard if your friend walks to the right on skateboard with a momentum of 150 kg.m/s? What is the..
A 5.60 kg of mass is pressed against a spring with a spring constant of 12500 N/m. what potential energy is stored in the spring before the mass if released
A track has a height that is a function of horizontal position x, given by h(x) = x3 + 4x2 ? 37x + 16. Find all the positions on the track where a marble will remain where it is placed
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