What type of ions are electrons colliding with to cause resistance in a circuit?
a. metalloids
b. metallic
c. gases
d. non-metallic

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Given the data calculated in parts a, b, c, and d, determine the initial rate for a reaction that starts with 0.85 m of reagent a and 0.70 m of reagents b and c?

What do scientists use a scientific law for?