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A point charge +q of mass m, (m,+q) is placed at point P along the x-axis where V_r(infinity) is known. The charge (m, +q) is observed to have a velocidy in the +x direction of the magnitude v_x. At a later time (m, +q) is observed to be at a second point -|y| units along the y-axis where the potential is given by 3V_r(infinity). Find the expression for the new velocity at the second point.
The Beretta Model 92S (the standard-issue U.S. army pistol) has a barrel 127 long. The bullets leave this barrel with a muzzle velocity of 334 .What is the acceleration of the bullet while it is in the barrel, assuming it to be constant?
A copper bar 2.5 m long has a circular cross section of radius 2 cm. One end is kept at 80oC, what is the temperature gradient along the length of the bar
Three point charges are located on the positive x-axis of a coordinate system. Charge q1 = 2.0 nCis 2.0 cm from the origin, What is the net force
Assume you are the fish. You get up every morning and weigh yourself (in water), and find you weigh 0.42 N. You, being a boxfish, are a box measuring 4.164 cm per side. You see a poor, hungry fisherman, and decide to be his dinner. You hook yourself,..
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.5 m/s2. How far does the car go before it stops.
A galvanometer has an internal resistance of 30?and deflects full scale for a 60??A current, What is the magnitude of this resistor
Consider an ideal gas at 27 degree C and 1 atm. To get some idea how close these molecules are to each other, What is the length of an edge of each cube if adgacent cubes touch but not overlap
What is the maximum kinetic energy of electrons if the metal is illuminated by UV light of wavelength 375nm
A 23.00 kg chair initially at rest on a horizontal floor requires a 364N horizontal force to set it in motion. Once the chair is in motion, a 328N horizontal force keeps it moving at a constant velocity. A 23.00 kg chair initially at rest on a horizo..
Objects with masses of 180 kg and a 480 kg are separated by 0.410 m. Find the net gravitational force exerted by these objects on a 58.0-kg object placed midway between them
A cell has a 7.0-nm-thick membrane with a total membrane area of 6.0\times10^{-9}\;{\rm m^2}, How many sodium ions does this charge correspond to
The antenna on a cordless phone radiates microwaves at a frequency of 2.0 GHz. What is the maximum length of the antenna
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