Apowerful grasshopper launches itself at an angle of 45° above the horizontal and rises to a maximum height of 1.01 m during the leap. with what speed v did it leave the ground? neglect air resistance. hint: use conservation of energy. a. 6.29 m/s b. 7.15 m/s c. 5.98 m/s d. 6.72 m/s e. 5.37 m/s

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

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.