If 2 balls have the same volume, but ball A has twice as much mass as ball B, which one will have the greater density

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?