A propeller turns at 300 rpm. Find the angular velocity in rad/s and the tangential speed at the tip if the distance from the tip to the center is 30 cm.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

What are two different ways you could find the value of a? explain these methods.