What is mass and how dose it differ from weight

Which notation is used to represent an alpha particle? a. b. c. d.

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

Arrange the images in order to show how lake-effect snow occurs.