A Canadian dime weighs 1.75 g and has a thickness of 1.22 mm. A Canadian nickel weighs 3.95 g and has a thickness of 1.76 mm. In your wallet, you have have $0.80 in dimes and $0.60 in nickels. What is the total mass of the coins in your wallet?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Which type of fossil does this image depict?

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor