Do all the stars move in the sky ? Explain​

No, the stars do NOT move in the sky.

Explanation:

 Contrary to common misconception, no, the star DO NOT move in the sky, though they appear to move, it is just the earth movie around the sun. Same with the SUN not moving, Earth is spinning on it's axis, so one side of the Earth is having daylight, meanwhile, the other side is nighttime.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas