Aparallel-plate capacitor is constructed of two square plates, size l×l, separated by distance d. the plates are given charge ±q.
part a
what is the ratio ef/ei of the final electric field strength ef to the initial electric field strength ei if qis doubled?
part bwhat is the ratio ef/ei of the final electric field strength ef to the initial electric field strength ei if lis doubled? part cwhat is the ratio ef/ei of the final electric field strength ef to the initial electric field strength ei if d is doubled?

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

Which of the following are guidelines to follow for obtaining accurate observations