xavier is roller skating at 14km/h and tosses a set of keys at the ground at 8km/h the speed of the keys relative to the ground is?

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?