Calculate the speed of sound in air when the temperature of the air is -15 Celsius (I know the answer but I just don’t know how to get it.)

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?