A system absorbs 12 j of heat from the surroundings; meanwhile, 28 j of work is done on the system. what is the change of the internal energy Î'eth of the system?

a weightlifter raises a barbell of mass 100 kg from the floor to over his head (2.5 meters) in 2 seconds. what is his average power input? give ur answer in both watts and horse power

True or False: If your gas pedal jams, you should turn the key to lock to lock the steering wheel.

A transformer has 300 loops in the primary coil and in the secondary coil it has 100 loops. The primary coil has a voltage pf 90V. What would be the volt of the secondary coil?

A certain brand of hot dog cooker applies a potential difference (120 v) to opposite ends of the hot dog and cooks by means of the joule heat produced.

How many significant figures should be the product 62.25 x 37.4 have a 2 b 3 c 4 d 7

What is the total momentum of the system after the collision

Compare the advantages and disadvantages of buying compact fluorescent bulbs rather than filament bulbs (6 marks)

Calculate the volume of this regular solid. A cylinder labeled B at the top, 13 centimeters high with a radius of 4 centimeters.

If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth woulda. quadruple. b. be the same. c. double. d. be eight times as much as now.

In what regions of the electromagnetic spectrum is the atmosphere transparent enough to allow observations from the ground?