A student releases a ball from a height of 100cm above the ground. The ball bounces to a height of 80cm. The diagram below show’s position at five different times from its starting point to its maximum height after the first bounce.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Write two balanced equations 1. dissolving of solid sodium hydroxide in water 2. the reaction of sodium hydroxide solution with hydrochloric acid

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.