Most scientists believe that perpetual-motion devices can never be invented, but people come up with new ideas for them all the time. Do you think people should keep trying? Why?

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

The speed of light can be used to measure the

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c