Which subatomic particle has a positive charge options: A. Neutron
B. Electron
C. all of the above
D. Proton

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°c to 175°c. what is the specific heat capacity of iron?

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.