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Two point charges are separated by 6 centimeter. The attractive force between them is 20 Newton. Calculate what the force between them when they are separated by 12 centimeter. How can you solve this without knowing the magnitudes of the charges? If they have equal magnitude, evaluate what is the magnitude of each charge?
Two skaters, of mass mA = 60kg and mB = 90 kg, are skating toward each other at the same speed v = 4 m/s. What is the speed of skater A following the collision
a 6.9nc charge is located 1.7m from a 3.8nc charge. find the magnitude of the electrostatic force that one charge
A rocket has a total mass of 1.12 105 kg and a burnout mass of 1.09 104 kg, including engines, shell and payload. Estimate the speed at burnout if gravity isn't neglected
Presume you carry a bag of groceries weighing 148 N from your car to the kitchen, a distance of 59m, without raising or lowering the bag.
an automobile and train move together along parallel paths at 20.7 ms.the automobile then undergoes a uniform
A 2.80-kHz tone is being produced by a speaker with a diameter of0.240 m. The air temperature changes from 0 to27.1 oC. Assuming air to be an ideal gas, find the change in the diffraction angle
is a transformer has 100 primary turns and 200 secondary turns. what is the current in the secondary coil if the
According to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponent's head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in 0.018s
An amazing parent pushes their child's sled (total mass = 65kg) so that the sled is moving at 5 m/s at the top at the sledding hill which makes a 20 degree angle with the horizontal. calculate the speed of the sled
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530 at a wavelength of 410 nm (violet). what is the angle of refraction for each wavelength
A solid sphere is rolling on a surface. What fraction of its total kinetic energy is in the form of rotational kinetic energy about the center of mass?
Starting from rest, a 1.8 10-4-kg flea springs straight upward. While the flea is pushing off from the ground, What is the flea's speed when it leaves the ground
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