Electrical, fluids and thermal

Question 1 of 10

The thermal efficiency of an engine that takes in 1,000 J and rejects 650 J is

Question 2 of 10

A 6 Ω heater is connected to a 12 V supply. What is its power?

Question 3 of 10

What is the water pressure at a depth of 5 m? (Density of water = 1,000 kg/m³)

Question 4 of 10

Bernoulli's principle explains

Question 5 of 10

Water flows through a 0.02 m² pipe at 3 m/s. The flow rate is

Question 6 of 10

Heat transfer through a metal rod is by

Question 7 of 10

A pipe narrows from 0.04 m² to 0.01 m². If speed in the wide part is 2 m/s, speed in the narrow part is

Question 8 of 10

In a hydraulic press, a 50 N force on a 0.01 m² piston produces on a 0.5 m² piston a force of

Question 9 of 10

A gas at 100 kPa occupies 2 L. At constant temperature it is compressed to 1 L. What is the new pressure?

Question 10 of 10

A 100 W lamp uses electricity for 10 hours. How much energy does it use?