Number 2- Liquids
Number 3- Cells
Answer:

Part 1

Part 2

Explanation:
Given that
Diameter,d=1 μm
Length ,l=2 μm
As we know that volume of cylinder given as



Surface area,A
A=π d l


Part 1

Part 2

Speed (ex: meters/second, miles/hour)
Answer:
yes, what's your question. l will help if I can.
Answer:
This conveyor belt should be connected to fixed pulleys in case their total effort is less than the load. But if it's not that, the belt should be connected to movable pulleys.
Explanation:
