A piece of iron is heated to 155 degrees celsius and placed into a calorimeter that contains 50.0 mL of water at 18.7 degrees celsius. The temperature of the water rises to 26.4 degrees celsius. How much heat was released by the iron?

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units: