Two bricks of the same mass are each on ledges. brick 1 is 100 feet high and brick 2 is 300 feet high. brick 2 has:
1. zero times more potential energy
2. two times more potential energy
3. three times more potential energy
4. four times more potential energy
5. nine times more potential energy

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Why should seat belts not be mandatory quick plz