The specific heat of platinum is 0.133 J/g°C .How much heat is released when a 10 g piece of platinum cools from 100°C to 50°C

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.