A boy is exerting a force of 70 N at a 50-degree angle on a law mower. He is accelerating at 1.8 m/s2. What is the mass of the lawn mower?

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Energy stored in the bonds that hold together the atoms and molecules of all substances is called a. kinetic energy. b. electrical energy. c. mechanical energy. d. chemical energy.

If a young male's body is just beginning the process of producing sperm, when is it likely that he would ejaculate mature, viable sperm"