Rabid texas basketball fans have been known to rush out of their laboratory class at 5: 00 p. m. and immediately get on highway i-35 to arrive in waco, 100 miles away, at 7: 00 p. m. to see the baylor-longhorn basketball game. they spend 4 hours watching and then celebrating the outcome of the game, and then drive 2 hours back to austin. after they completed their trip, what is their mean velocity for their trip? mph is miles per hour

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 one of the following research methods can show cause and effect

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?