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An electron remains suspended between the surface of the Earth (assumed neutral) and a fixed positive point charge, at a distance of 4.99 m from the point charge. Determine the charge required for
A(n) 0.224 kg baseball is thrown with a speed of 22.4 m/s. It is hit straight back at the pitcher with a final speed of 20.8 m/s. What is the magnitude of the impulse delivered to the ball?
A gun shoots bullets that leave the muzzle with a speed of 326 m/s. If a bullet is to hit a target 172 m away at the level of the muzzle, the gun must be aimed at a point above the target. How far
Three pendulums with strings of the same length and bobs of the same mass are pulled out to angles q1, q2 and q3 respectively and released. The approximation sin q = q holds for all three angles, w
A stretched rubber band has a length of 0.14 m and a fundamental frequency of 450 Hz. What is the speed at which waves travel on the rubber band?
A rectangular container measuring 33 cm 38 cm 61 cm is filled with water. What is the mass of this volume of water in kilograms and grams?
A .114 kg baseball is pitched horizontally at 38 m/s. After it is hit by a bat it moves horizontally at -38 m/s. a) What impulse did the bat deliver to the ball?
Suzie (50 kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 0.5
A parallel-plate capacitor has a plate area of 1cm^1 and a plate separation of 2.5 mm. To obtain an electric field of 1.0*10^6N/m between the plates, the magnitude of the charge on each plate shoul
A package is dropped from a passing plane (moving in the horizantal direction) and produces a projectile motion as it is falling to the ground. If it takes the package only 30.12 seconds until it h
A point charge is distance from the center of a dipole consisting of charges separated by distance . The charge is located in the plane that bisects the dipole. At this instant, assuming r>>s
A boy is attempting to swim directly across a river; he is able to swim at a speed of 0.421 m/s relative to the water. The river is 2.48 m wide and the boy ends up at 4.77 m downstream from his sta
A 3.10 box that is several hundred meters above the surface of the earth is suspended from the end of a short vertical rope of negligible mass. A time-dependent upward force is applied to the upper
A copper block rests 30.0 cm from the center of a steel turntable. The coefficient of static friction between the block and the surface is 0.53.The turntable starts from rest and rotates with a con
A spring cannon is located at the edge of a table that is 2 m above the floor. A steel ball is launched from the cannon with speed vi at 40.0° above the horizontal. Find the horizontal position
A sound wave traveling at 341 m/s is emitted by the foghorn of a tugboat. An echo is heard 3.20 s later. How far away is the reflecting object?
In the list below are described five situations. In some of the situations, the mass is at rest and remains at rest. In other situations, at the instant described, the mass is in the middle of an o
Calculate the speed of the fetal heart wall at the instant this measurement is made.
A piece of wood is 6.00m long, 0.250m wide and 0.080m thick. Its density is 600kg/m cubed. what volume of iron ( P iron = 7.8 x 10 cubed kg/m cubed) must be fastened underneath the wood to sink it
Two 2.0 kg plastic garbage cans are sitting 2.6 meters apart on a sticky classroom floor (coefficient of static friction μs = 0.40). They are not moving. If the first one has a charge of 10 μC
There is no buildup of charge inside the box. After 10 seconds has elapsed, how much charge has flowed out of the box through the blue wire?
A driver in a car traveling at a speed of 56.0 mi/h sees a deer 116 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (a
A cloud that is about to unleash a lightning bolt has a charge of +24 coulombs. In stormy weather, powerful updrafts of air carry electrons from one place in the storm system to another. If the clo
A sound wave in air has a frequency of 294 Hz and travels with a speed of 343 m/s. How far apart are the wave crests (compressions)?
The difference in potential between the ac- celerating plates of a TV set is about 26 kV. The distance between these plates is 1.7 cm. Find the magnitude of the uniform electric field in this regio