What are two indicators a chemical reaction has taken place

What does a transformer do? changes the voltage of electricity leaving a power plant changes the temperature of steam in a power plant cools the water in a nuclear reactor

Describe what happens to the average kinetic energy of water molecules as water freezes.

Suppose you heat a liquid and then bubbles are produced. With no other evidence, can you tell whether a physical or chemical is occurring? Explain your answer

According to Newton's second law of motion, if a rigid body of unchanging mass is observed accelerating, what must be happening?

Based on the bond energies given for each of the following which is the most stable? O=O 498 kJ/mol N≡N 946 kJ/mol C=C 614 kJ/mol C=O 745 kJ/mol C≡C 839 kJ/mol

Life cycle of a medium mass star

Use the periodic table to complete this equation that represents the process of nuclear fusion. Superscript 14 Subscript 7 Baseline N + Superscript 1 Subscript 1 Baseline H yields Superscript A Subscript B Baseline C

Josh rolled a bowling ball down a lane in 2.5 seconds. The ball travelled at a constant acceleration of 1.8 m/s/s down the lane and was traveling at a speed of 7.6 m/s by the time it reached the pins at the end of the lane.

How many meters of the rock wall eroded between 1910 and 1927?

As air temperatures increase, evaporation increases. Warmer temperatures also increase the capacity to absorb water vapor. More water vapor in the atmosphere accelerates the greenhouse effect.