Football helmets have a hard outer shell lined with a thick layer of plastic foam inside the shell what is the primary purpose of me foam lining

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.