Asolid plastic ball hits a stationary tennis ball in a perfectly elastic collision. if the mass of the plastic ball is three times that of the tennis ball, which statement is true? the two balls separate but continue to move in the same direction. the two balls stick and move together. the plastic ball stops and the tennis ball starts moving. the plastic ball moves backward.

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

The plum pudding model of the atom state that ?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth