For every 100 J of energy supplied to a motor, 80 J of useful work is done. Calculate the efficiency of the motor. Give your
answer as a percentage.

Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.