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Consider two identical +76 microcoulomb point charges placed 73 cm apart. Let there be a +1 nC (1 nanocoulomb = 1E-9 coulomb) test charge midway between them. Calculate the work (in J) required to move the test charge to a point 7.9 cm closer to either of the charges.
a 70.0 kg man jumps 1.00 m down onto a concrete walkway. His downward motion stops in 0.0200 seconds. what force is transmitted to his leg bones
A uniform ladder 6.58 m long weighing 460 N rests with one end on the ground and the other end against a perfectly smooth vertical wall, Find the friction force that the floor exerts on the ladder
What minimum force is necessary to start the block moving up the wall? (Hint: The static frictional force is now directed down the wall.)
a solenoid is designed to store Ul = 0.10 J of energy when it carries a current I of 450 mA. How many turns of wire must the solenoid have
A high-voltage power line carries a current of 140 at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 69 below the horizontal.
A small, 300 cart is moving at 1.90 on an air track when it collides with a larger, 1.00 cart at rest. After the collision, the small cart recoils at 0.890. Evaluate the speed of the large cart after the collision?
A science student is riding on a flatcar of a train travellingalong a straight horizontal track at a constant speed of 10.0 m/s.The student throws a ball along a bath that she judges to make aninitial angle of 60.0 degrees with the horizontal and ..
We want to model the flow of water in a 15 cm diameter pipe at m/s. Our air blower produces 14 x 10-3 m3/s. What pipe diameter, in cm, should we use for the air
A 70.5kg football player is gliding across very smooth ice at 1.75 m/s. What is the player's speed afterward if the ball is thrown at 12.5m/s relative to the player
On a frozen pond, a 11.6 kg sled is given a kick that impartsto it an initial speed of vo = 2.15 m/s. find the distance the sled moves before coming to rest
Suppose an observer measures the length of a stationary spaceship to be 6 m (note: m for meters). what is the length of the same spaceship
A 859 kg geosynchronous satellite orbits a planet similar to Earth at a radius 1.94 × 10^5 km from the planet's center. What is the force acting on this satellite
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