Hello everyone! I have a question about science; In a video game, a flying coconut moves at a constant velocity of 20 meters/second in a positive direction. The coconut hits an obstacle and moves in the opposite direction with a constant velocity of 10 meters/second. What’s the change in velocity of the coconut?

A.
-30 m/s
B.
-10 m/s
C.
10 m/s
D.
30 m/s

Which statement justifies that phosphine (ph3) is a polar molecule?

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

What shape would a molecule with two bound groups and two lone pairs have?