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A charge Q is transferred from an initially uncharged plastic ball to an identical ball 17 cm away. The force of attraction is then 68nM .
How many electrons were transferred from one ball to the other?
Three 17--long rods form an equilateral triangle. Two of the rods are charged to + 16 , the third to - 16 . What is the electric field strength in the middle of the triangle
A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. The coefficient of static friction between the crate, What is the acceleration of the crate relative to the ground
An object's true weight is 123 N. When it is completely submerged in water, its apparent weight is 82 N. what is the density of the object
q1. a student in a parked car honks the horn that has a proper frequency of 310.00 hz. an observer in an approaching
At a certain location, the Earth's magnetic field has a magnitude of 6.2×10?5T, Find the magnitude of the magnetic flux through the top of a desk at this location that measures 130cm by 72cm
Find the critical angle of total internal reflection from glass with refraction index n = 1.51 into air
The distance of the lens in the human eye fromthe retina, on which the image is focused, is about 1.7 cm. what must be the focallength of the eye
An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 15.0 N. What is the volume of the object
determine the force P needed to support the 100-lb weight. Each pulley has a weight of 10 lb. Also, what are the cord reactions at A and B
a weather balloon with a volume of 270.0 l is launched at 20degrees c at sea level where the atmospheric pressure is
A cosmic-ray proton in interstellar space has an energy of 25.0 MeV, What is the magnetic field in that region of space
A 72 kg man in a 5-kg chair tilts back so that all weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with the radius of 1.0 cm, and find out the pressure exerted on the floor by eac..
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