This topographic map shows three hills. The distance between any two lines on the map represents a height change of 3 meters. Match each description to the correct point on the map. B D Tiles the highest point on the map a place where water will collect the steepest slope on the map erosion control using vegetation

What is hidden during a lunar eclipse? isn't the moon hidden?

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

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.