Energy is observed in two basic forms: potential and kinetic. which of the following correctly matches these forms with a source of energy?

a. the heat released from a living organism: potential energy
b. the energy related to the height of a bird above the ground: kinetic energy
c. the covalent bonds of a sugar molecule: potential energy
d. the motion of individual molecules: potential energy
e. the energy associated with a gradient of ions across a membrane: kinetic energy

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

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.