. Example 2.8
PI: A hydraulic lift with piston of diameters D,- 5 cm and D,= 15 cm is shown in Figure :
: 2.10. If the weight of the block W = 1800 N, find the minimum force F to lift up the:
weight W

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory

Does current flow through or across a resistor?