An airplane flies 2100 miles in 3hours. What is it’s average speed in miles per hour?

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?

How does the viscosity of magma change as magma cools?

How does a noncompetitive inhibitor reduce an enzyme’s activity?