Name the part of a spherical mirror, when a light ray incident on which is reflected by making equal angles with the principal axis.

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon