Numericals: A 32 ohm resistors and a 20 ohm resistor are connected in parallel and combination is
connected across a 240V dc line.
a. What is the resistance of circuit?
b. What is the total current in the circuit?
c. What is the current through each resistor?

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

By what primary heat transfer mechanism does the sun warm the earth?