What is responsible for making the sun shine?

A gas mixture contained in a cylinder and piston assembly. The gas mixture released 903 kJ in form of heat into its surroundings. The internal energy during this process decreased by 450 kJ. Calculate the work involved during this process.

Suppose you use a diffraction grating that contains 600 lines/mm in your spectroscope. What effect would you expect this to have on the sharpness and resolution of the lines in your line spectrum?

How can we calculate the distance with two different speeds

A piece of wood with density of 824 kg/m^3 is tied to the bottom of a pool and the wood does not move. The volume of the wood is 1.2 m^3. What is the tension is in the rope?

What is the difference between weathering, erosion, and decomposition?

If 2 grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 46 grams of X to form the same compound?

How do positive and negative charges interact with each other?

What is electricity

What happens to the density as one progresses through the layers of the earth from the lithosphere toward the inner core

What is tiny holes on the surface of a plant?