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Four +6 µC point charges are at the corners of a square of side 3 m. Find the potential at the center of the square (relative to zero potential at infinity) for each of the following conditions.
(a) All the charges are positive
(b) Three of the charges are positive and one is negative
(c) Two are positive and two are negative
Two tug boats are towing a ship. Each exerts a horizontal force of 5 tons, What net force is exerted on the ship
Discuss the possible changes of whales' songs as a result of temperature, wave speeds, and etc. How could you distinguish the whales' songs from other songs
You have two capacitors, one with capacitance 12.3 × 10-6 F and the other of unknown capacitance. obtain its capacitance
In a head-on collision, a car stops in 0.30{\rm s} from a speed of 30{\rm m}/{\rm s}. What force is applied to the driver by his seat belt during that fraction of a second
Find the force exerted by reflecting sunlight off a reflecting aluminum sheet in space if the area normal to the sunlight is 5000 m^2 and the solar intensity is 2500 W/m^2
A high-voltage transmission line with a resistance of 0.33 omegacap.gif/km carries a current of 1040 A. compute the power loss due to resistance in the line
The pitch of the sound from a race car engine drops the musical interval of a tenth when it passes the spectators. How fast is the race car moving
Find out the type of mirror and how far the object is
An airplane traveling north at 400 m/s is accelerated due east at a rate of 50m/s squared for 6 seconds. what is the final speed of the plane
Find the positions of the two masses at any subsequent time t (before either mass returns to the table) and describe the motion.
An 8-kg ball hanging from the ceiling by a light wire 135cm long is struck in an elastic collision by a 2 kg ball moving horizontally at 5.00 m/s just before the collision. Find the tension in the wire just after collision.
A 220g ball is thrown horizontally at 19.2m/s, As it falls under the influence of gravity, find its final momentum (magnitude) after 1.00s.
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