A spelunker is surveying a cave. She follows a passage 140 m straight west, then 290 m in a direction 45? east of south, and then 280 m at 30? east of north. After a fourth unmeasured displacement, she finds herself back where she started. Use a scale drawing to determine the magnitude of the fourth displacement. Determine the direction of the fourth displacement.

The atoms in a sidewalk on a hot summer day are vibrating the atoms in the sidewalk on a freezing day in winter. a. more rapidly than b. more slowly than c. at the same speed as

Which is an example of an exothermic process?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?