If a telescope has a lens with a diameter of 60 cm, what is the shortest distance between two objects on the moon that the telescope can resolve? use 3.84 x 108 m for the distance from the earth to the moon, and 550 nm for the wavelength of the light coming from the moon.

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?