Which of the following is an example of a difference between planets in the solar system? A planet can have a surface made of either liquid or gas.
Some planets have thick atmospheres, while others have thin atmospheres.
A planet must have a moon, but it can differ in terms of its size.
All planets have rings, but some are very hard to see with your eyes.

Describe uniform velocity and variable velocity in short

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

What causes the formation of ocean currents?