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When pulling a mass hanging from a spring at a constant rate down then releasing it so it bobs up and down, where does the mass have the most and least kinetic energy? If the mass is 1 kg, and originally pulled 5om down, what is its maximum amount of kinetic energy?
A modern microscope is equipped with a turret that has three objectives with focal lengths of 16 mm, 4.0 mm, and 1.6 mm, What are the greatest and least magnifications possible
During the investigation of a traffic accident, police find skid marks 90.0 m long. Estimate the speed of the car when the brakes were applied
In a nebula, the amount of interstellar extinction in the visible wavelength band is 1.1 magnitudes. The thickness of the nebula is estimated to be 16 pc and it is located 458 pc away.
Two ships are moving along a line due east (see figure below). The trailing vessel has a speed relative to a land-based observation point of v1 = 59.5 km/h, What frequency is monitored by the leading ship
At rest, a car's horn sounds at a frequency of 410 Hz. The horn is sounded while the car is moving down the street. What is the speed of the car
If you hold a horizontal metal bar several centimeters above the ground and move it through grass, each leaf of grass bends out of the way. How can it exert enough force on a leaf of grass to shear it off
The planet Venus requires 225 days to orbit the sun, which has a mass M = 1.99 x 1030 kg, in an almost circular trajectory. Calculate the radius of the orbit of Venus and the orbital speed of Venus as it circles the sun.
An electron passes through a point 3.75 cm from a long straight wire as it moves at 36.1% of the speed of light perpendicularly toward the wire. Find the magnitude of the electron\'s acceleration at that point
A ball rolls horizontally off the edge of a tabletop that is 1.40 m high. What was its speed at the instant it left the table
A capacitor C is charged to an initial potential of 60.0 V, with an initial charge of Q0. It is in a circuit with a switch, Calculate the energy in the circuit after a time of 11 periods
The primary coil of a transformer has N1 = 4.50 102 turns, and its secondary coil has N2 = 1.35 103 turns. what rms voltage is developed across the secondary coil
At the Equator near Earth's surface, the magnetic ?eld is approximately 64.5 µT northward and the electric ?eld is about 51 N/C downward in fair weather. Find the magnitude of the gravitational force on the electron
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