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A positive charge of Q = 4.60 uC is fixed in place. From a distance of ri = 4.60 cm a particle of mass m = 5.70 g and charge q = +3.70 uC is fired with an initial speed of v = 62.0 m/s directly toward the fixed charge. What is the minumum distance rf between the two charges?
A skydiver opens the parachute at the moment when he is 540 meters above the ground and his speed (right before opening the parachute) is 97m/s. What should be the magnitude of the air resistance force
For the real or imaginary nucleus of 70X170, find the net electrical charge of the nucleus and the approximate radius of the nucleus
A magnetic field near the ceiling points up and is decreasing. Looking up at the ceiling, does non-Coulomb electric field curl clockwise or counter-clockwise.
It is believed that a large electric fish known as Torpedo occidentalis uses electricity to shock its victims, What is the total amount of work done during one pulse
A 6.6-kg rock and a 4.7 × 10-4-kg pebble are held near the surface of the earth. Determine the magnitude of the gravitational force exerted on each by the earth
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.2 MJ, What is the moment of inertia of the flywheel
A plane accelerates from rest at a constant rate of 5.00m/s2 along a runway that is 1800m long. What is the time tTO needed to take off
An object with a charge of -2.6?C and a mass of 1.2×10?2kg experiences an upward electric force, Find the magnitude of the electric field
A police radar gun emits an electromagnetic wave at a frequency of fs = 1.08×1013 Hz. What is the speed of the oncoming car (v)
What is the tension in the string.At one time, television sets used "rabbit-ears" antennas. Such an antenna consists of a pair of metal rods.
An electron confined in a one-dimensional box is observed, at different times, to have energies of 32.5 eV, 57.8 eV, What is the length of the box
A charge ?1.3 × 10^ ?5 C is ?xed on the x-axis at 9 m, Calculate the electric potential at the origin
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