Which of the following is the best example of heat being transferred from one object to another by direct contact? a. a fire in a fireplace warms the entire room. b. the coldest air in the supermarket is in the aisle where the frozen foods are kept. c. a drink can be cooled off by dropping ice cubes into it. d. sunlight feels warmest when it falls directly on a person's skin.

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

Which statement is true regarding the diagram of circle p? the sum of y and z must be 2x. the sum of y and z must be x. the difference of z and y must be 2x. the difference of z and y must be x

Elizabeth has two separate samples of the same substance. sample is in the liquid state, and the other is in the solid state. the two samples most likely differ in which property?