Can someone help me out now pls? I’m doing the test now. Please explain ur answer.

the answer is c because the motor inside the body massager moves the massagers creating a massage?

Explanation:

C

Explanation:

Out of all the options, only body massager which uses electric energy to move back and forth is using motor here. It is because a motor converts electrical energy to Mechanical energy and only massager obeys it among all the options.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

12 is it do you think so