Object A is 3.0 kg and located 2.0 m left of the fulcrum. Object B is 7.0 kg and located 0.5 m left of the fulcrum. Object C is 8.0 kg and located 0.1 m right of the fulcrum. Object D is 4.5 kg and located 1.6 m right of the fulcrum. What is the total torque on the lever

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

coil wire, increase current, put iron inside the coil

there are no contact forces mentioned on the list of choices that you've provided.

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.