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A +30 µC charge is placed 40 cm from an identical +30µC charge. How much work would be required to move a +0.41µC test charge from a point midway between them to a point 5cm closer to either of the charges?
A particle of mass m is confined to move in a one-dimensional "infinite" potential well defined by V(x)=0, |x|
A very massive object, almost infinitely massive, moving with a velocity V1=100m/s hits a very light object ("massless") at rest. What is the final velocity of the very light object
Two satellites, A and B, are in different circular orbits about the earth. Find the ratio (TA/TB) of the periods of the satellites
Suppose the solenoid filled with a paramagnetic substance such as liquid oxygen. Qualitatively,how will this change your your answer to Part (b)? Will your reply increase, decrease,or remain the same.
A certain camera has f-numbers that range from 1.3 to 5. If the focal length of the lens is 49 mm, what is the range of aperture diameters for the camera
Two astronauts are 1.40 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electromagnetic waves. How far away from the earth is the spaceship
Copper wire has a breaking stress of about 3×108 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.66 mm
a system of 1435 particles, each of which is either an electron or a proton , has a net charge of -7.216x10^-17, how many electrons are in this sytem
An object is placed to the left of a convex lens and on the optical axis. evaluate the magnification of the image formed by the lens
A 4000.0 kg spaceship is traveling toward the moon at a velocity of 20.000 km/s. At the rear of the spaceship, What is the spaceship velocity after the rocket fires
Two boats start together and race across a 64-km-wide lake and back. Boat A goes across at 64 km/h and returns at 64 km/h. Boat B goes across at 32 km/h, and its crew, realizing how far behind it is getting, returns at 96 km/h. Turnaround times ar..
An engine has a hot-reservoir temperature of 910 K and a cold-reservoir temperature of 530 K. What is the efficiency of the engine
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