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Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 9 m in an evacuated chamber. One sphere has a charge of +50 ?C, and the other has a charge -50 ?C. Find the difference in final speeds of the two spheres (the speeds just before each one hits the ground). Assume that there is a downward electric field of about 150 V/m near the Earth's surface.
A 100 arrow is shot perpendicularly from a bow whose effective spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does arrow rise.
Two point charges are fixed to rectangular coordinate system, Charges of q1 = 3.5uC and q2 = -15 uChave coordinates (0.55,0) and (0,0) in meters respectively
Imagine a very long, uniform wire that has a linear mass density of 0 . 0012 kg / m, What is the magnitude of the current in the wire that keeps it levitated just above the ground
For a camera equipped with a 51-mm focal-length lens, How far is the object from the image on the film
Beats of frequency 4Hz are heard when a tuning fork of frequency 1000Hz and a vibrating wire are sounded together. What is frequency of the wire.
An earth satellite is observed to have a height of pergee of 210 Kilometers and a height of apogee of 1,200 kilometers. Find the period of the orbit
The mass of a string is 1.00 10-3 kg, and it is stretched so the tension in it is 120 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string?
a rotating merry-go-round is essentially a disk with mass of 250 kg an radius of 2.5m, Determine the final angular speed of the merry-go-round/son combination
Suppose a distant world with surface gravity of 5.28 m/s2 has an atmospheric pressure of 7.16 multiply.gif 104 Pa at the surface. Calculate the pressure at a depth of 10.0 m in the methane ocean
The total mass of the gas is 12.48 g. What is molecular mass of the gas? the gas expands so that the cylinder has twice the height. How much work did the gas do assuming the pressure remained constant.
The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. The mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain by the block and tackle pulley system. What is the work done..
Estimate, from these data, the effective distance between the atoms.
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