20 POINTSSS PLEASE HELP You own a semi-truck company and recently your employees have gotten into a lot of accidents due to the semi-trucks having too much momentum. What 2 things could you do as the boss to decrease the momentum of your semi-trucks? Use BLUE colored font for your answer.

a.)

b.)

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above