What is the definition of Constructive Interference? plz help TvT 1: When two interfering waves line up, two crests and two troughs overlap. Increased amplitude.
2: The bending of waves as they pass through openings or around corners
3: When two interfering waves are in the opposite direction, crest and trough overlap. Zero amplitude.

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.