The two Keck 10-meter telescopes, separated by a distance of 85 meters, can operate as an optical interferometer. What is the Keck interferometer's resolution when it observes in the infrared at a wavelength of 2 microns?

After a car's engine has been running for a while, if you stand near the car's engine you can often feel heat coming from the engine as a result of a. radiation b. convection c. conduction

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c