A runner is dragging in a straight line at a steady we are equals 7.4 km/hour. When the runner is L equals 6.3 from the finish line, a bird begins flying straight from the runner to the finish line VV equals 22.2 km/hour parentheses three times as fast as the runner). When the bird reaches the finish line, it turns around and flies directly back to the runner. What cumulative distance does a bird travel? Even though the bird is another assume that it occupies only one point space, travels in a straight line, and I can turn with a loss of speed. Answer in units of kilometers

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

Which changes of state do the labels represent? a: b: c:

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!