A block and tackle system has two movable and fixed pulleys. If the efficiency is 100%, calculate the Mechanical Advantage of the system

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

because if the tool that you are using is not balanced it there would be false mass.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

answeralert drivers who drift off the road;