Apoint charge q_1=-4.00\; {\rm nc} is at the pointx = 0.600 meters, y = 0.800 meters, and a second pointcharge q_2=+6.00\; {\rm nc} is at the pointx = 0.600 meters, y = 0.

a)calculate the magnitude e of the net electric field at the origin due tothese two point charges.

b)what is the direction, relative to the negative x axis, of the net electric field at the origin due to these two pointcharges.

Which type of microscope would allow the viewer to see ribosomes inside a cell?

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline