What is the net magnetic force on a compass needle? By what mechanism does a compass needle align with a magnetic field?

List two general reasons why scientists are likely to collaborate

why are the group 17 elements the most reactive of the nonmetal elements a) they are the biggest elements b) they have the fewest electrons c) they are located on the farthest right side of the periodic table d) they require only one electron to

Juanita made an electromagnet by placing an iron bar inside a coil of wire and then running current through the wire. After awhile, she turned off the current. What happened to the bar? A The bar continued to be magnetic forever.

Which choice defines AC and DC correctly?

What does refraction mean?

According to the kinetic-molecular theory, gases condense into liquids because of

What does sound travel throu better

How does a change in resistance affect the conductivity of a material? A) The lower the resistance, the worse the conductivity B) The lower the resistance, the better the conductivity C) The higher the resistance, the better the conductivity D) The

Two railroad cars, each of mass 6500 kg and traveling 80 km/h in opposite directions, collide head-on and come to rest. how much thermal energy is produced in this collision?

What is a result of using a machine?