Electromagnets are created by (2 points) select one: a. applying a charge to a magnetic material, wrapped in an insulator, which creates an electromagnetic field around the magnet. b. covering a magnet with insulation and applying an alternating electrical current to the magnet. c. twisting a ferromagnetic material, wrapping in an insulator, and applying a direct current to the coil. d. wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

Concerning the 10.0 ml of 0.50 m nacl to 100 ml of solution: when a solution is diluted, does it change the number of moles dissolved?

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.