An angry mob lynches a phsical teacher after receiving their grades. they throw the physics teacher off a tall building . they throw the physics teacher straight down with a velocity of 20m/s. the teacher falls for 30 seconds before landing on a stack of empty card board boxes . how high was he thrown from?

Ineed with these last two questions: 1) what are two types of cold air masses that influence the weather in north america? name them and describe their humidity. 2) describe the motion of a cold air mass and a warm air mass and the weather you would expect at a warm front and an occluded front.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

The solid that is formed and usually sinks to the bottom of a solution is the