Pleaseee help as soon as possible!! Mary Anne walks 1000 meters north to the store and walks back 900 meters south to her friends house. The friend’s house is 100 meters to the north of Mary Anne’s house. What was Mary Anne’s Travel Distance?
-2000 meters (I chose this and got it wrong)
-100 meters south
-1900 meters
-100 meters

With these questions , 15 pts & brainliest

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation