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Two stationary positive point charges, charge 1 of magnitude 3.45 nC and charge 2 of magnitude 2.00 nC, are separated by a distance of 32.0 cm. An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges.
What is the speed (v final) of the electron when it is 10.0 cm from charge 1?
A wire of resistance 7.0 isconnected to a battery whose emf is 2.0 V and whose internal resistance is 1.0. How much energy appears in the wire as thermal energy in that time
An unknown tuning fork produces a beat frequency of 3Hz when played with a 440Hz fork, What is the frequency of the unknown fork
approximately what is the mass of an object whose weight equals the force from part "b"? can you lift such a mass.
A 107A A current circulates around a 2.20-mm-diameter superconducting ring. What is the ring's magnetic dipole moment
Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.5 cm-3, and their speed is 657 km/s. Find the current density of these protons
q1. the density of gold is 1.93times104 rmkgmrm3. 203 rm g of gold is shaped into a cube. what is the length of each
A certain fuel-efficient hybrid car gets gasoline mileage of 55.0 mpg (miles per gallon). how many tanks of gas will you use to drive 1600 km
The front 1.20 m of a 1,350-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. What is the magnitude of the average force on the car
A 3.2 kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. What is the elastic potential energy of the system
a 130-m-wide river flows due east at a uniform speed of 4.3 ms. a boat with a speed of 7.3 ms relative to the water
A volleyball is spiked so that it has an initial velocity of 17.4 m/s directed downward at an angle of 48.8 ° below the horizontal. What is the horizontal component of the ball's velocity
A motor pulls a ski tow rope moving 10 skiers at a time (each 75kg) up a slope of 20 degrees at a constant 2m/sec speed. find the minimum power the motor must have to accomplish this
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