PLEASE HURRY!
If I have two dumbbells, one 10 lb the other 50 lb roll down equally steep ramps. The gravitational force acting on each one is proportional to their mass. Which one would reach the bottom first?
1. the 10 lb
2. the 50 lb
3. They would be the same

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

Amira pulls a 3 pound wagon 4 feet. how much work has she done?