Which is true of all covalent compounds? Group of answer choices They are usually made of a metal and a nonmetal. They are good conductors in water. They are electrically charged. They share electrons in bonds.

The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?