1. which of the following exerts gravity?
a) only planets, moons, and stars
b) only the earth
c) only objects on earth
d) any object with mass

D. Any object with mass.

All objects have mass which means that they have gravity, no matter where they are. The place they are at only determines their weight, not mass. Hope I helped!

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: