A charge of 20 nC is distributed uniformly along the y axis from y = 0 to y = 4 m. Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +3 m on the x axis?
A.
B.
C.
D.
E.
Answer: A
You might also like to view...
Imagine that you are trying to stop neutrinos with a lead shield. How thick would you need to make this shield to ensure that it can stop a neutrino?
A) about 700,000 kilometers (the radius of the Sun) B) about 150 million kilometers (the size of an astronomical unit) C) about 14 billion light years (the size of the observable universe) D) about one light year E) about one meter
Answer the following statement(s) true (T) or false (F)
1. We can consider a set of all chlorine atoms in a block of salt (sodium chloride) to be a “system.” 2. We can consider that set to be an “extended object.” 3. Consider a three-particle system. The center of mass of this system must lie on the plane that contains all three particles. T or F? Be prepared to explain why or why not. 4. In the situation discussed in problem C4T.10, which would be the easiest reasonably valid frame to use? 5. A reference frame attached to a train is a reasonably good inertial frame if the train is stopped at a station.
Camera Exposure: If a camera lens aperture is set to f/4, then
A. the radius of the lens aperture is ¼ the focal length. B. the focal length of the lens is 4 mm. C. the diameter of the lens aperture is ¼ the focal length. D. the radius of the lens aperture is 4 times its focal length. E. the diameter of the lens aperture is 4 times its focal length.
Ocean waves with a wavelength of 120 m are coming in at a rate of 8 per minute. What is their speed?
A. 8.0 m/s B. 16 m/s C. 24 m/s D. 30 m/s E. 4.0 m/s