An open system is a system in which both matter and energy are exchanged with the surroundings.

a. true

b. false

What is the difference between frequency and speed?

True or false static is weightless colorless and odorless

SI unit of mass and gravity

Which source of information is generally considered credible?

how much energy is required to melt 2.5 moles of ice as 0.0 degrees Celsius to liquid water at 0.0 degrees Celsius

What is the change in internal energy if 60 J of heat are added to a system and the system does 40 J of work on its surroundings? Use AU = Q-W.

A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did gravity do on the bucket during this process?

You then decide to throw another disc to your friend in the tree for fun. If you throw the disc at a speed of 10 m/s and your friend catches it 5.0 m above you, what was the speed of the disc just before your friend catches it

Which is true? An ideal emf device has internal resistance and a real emf device does not. A real emf device sets up a potential difference and an ideal emf device does not.

An object is released from rest on a planetthat has no atmosphere. The object fallsfreely for 2.03 m in the first second. What is the magnitude of the accelerationdue to gravity on the planet?