Question 1in the first law of thermodynamics, , what does q stand for? the internal energy of the systemthe work done by the pistonthe change in the internal energy of the systemthe heat added to the systemquestion 2if the thermal energy of the system increases by 400 j, and 1,100 j of heat were added to the system, how much work did the system do? 400 j700 j1,500 j1,100 j

Aneutron and a proton combine to form a nucleus. why does the mass of the nucleus differ from the sum of the masses of the individual nucleons?

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.