Sarah rubbed a comb with a wool cloth. She then placed the comb near a piece of paper. Sarah observed that the paper was attracted to the comb. Why do you think rubbing the comb with the wool caused the paper to be attracted to the comb? Create a Google Document on which you answer this question. Be certain to give a complete explanation of what is happening to create the attraction.

What is the measure of a change in an objects velocity?

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.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)