Which of the following elements is a highly reactive nonmetal? a. iron (fe) b. sodium (na) c. flourine (f) d. helium (he)

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²