How does the electric force between two charged particles change if one particle's charge is increased by a factor of 2?
a. it is increased by a factor of 2.
b. it is decreased by a factor of 2.
c. it is decreased by a factor of 4.
d. it is increased by a factor of 4.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

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.

Avoltaic cell converts chemical energy to