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A positive charge of 0.800 C is located in a uniform field of 1.00×105 N/C. A negative charge of -0.400C is brought near enough to the positive charge that the attractive force among the charges just equals the force on the positive charge due to the field. How close are the two charges?
A Ferris wheel 30.0 meter in diameter rotates once every 18.0 second. Find the ratio of a man apparent weight to her real weight at the top
A 20 kg block is pulled across a horizontal surface by a rope. The block has an acceleration of 2.3 m/s2 and the coefficient of kinetic friction is 0.16. Decide the tension in the rope.
The maximum distance from Earth to the Sun (at our aphelion) is 1.521 x 10^11 m and the distance of closest approach (at perihelion) is 1.471 x 10 ^11 m. Assume the Earth's orbital speed at perihelion is 3.027 x 10 ^ 4 m/s. (overlook the effect of th..
An automobile club plans to race a 750 kgcar at the local racetrack. The car needs to be able to travelaround several 145 m radius curves at98 km/h.
A locomotive is pulling 13 freight cars, each of which is loaded by roughly the same weight. The mass of each can be taken to be 37, 000 kg. If the train is accelerating at 0.42 m/s2 on a level track, what is the tension in the coupling among the sec..
A 2-mol ideal gas system undergoes an adiabatic process where it expands and does 20 J of work on its environment. How much heat is received by the system
The electric output of a power plant is 700MW. Cooling water flows during the power plant at the rate 0.500 x 10^8L/hr. The cooling water enters the plant at 12.0ºC and exits at 27.0ºC. What is the power plant's thermal efficiency?
On Apollo Moon missions, the lunar module would blast off from the Moon's surface and dock with the command module in lunar orbit. Find the impact speed of the lunar module
A golf club strikes a 0.045-kg golf ball in order to launch it from the tee. find With what speed does the ball leave the club
A rectangular trough, 1.5 meter long, 0.70 meter wide, and 0.50 meter deep, is completely full of water. When you pull the plug, find at what speed does water emerge from the hole
a bottle of bleach is opened in a closed room where the air is perfectly still. estimate how long it will take for
A bat hits a moving baseball. If the bat delivers a net eastward impulse of 0.8 N-s and the ball starts with an initial horizontal velocity of 5.0 m/s to the west, what is the mass of the ball
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