Twinkling of stars is due to atmospheric:

Consider a sunlike start at a distance of 2 parsecsWhen it is seen through a telescope with 100 magnification, what should be the angular size of the star? Sun appears to be (1//2)^@ from the earth. Due to atmospheric fluctuationsw, eye can't resolve objects smaller than 1 arc minute.

If an earth's satellite is put in an orbit at some height h,where the resistance due the atmosphere cannot be neglected,how will the motion of the satellite be affected?

What is atmosphere?

T/F Silver metal gets tarnished on exposure to atmosphere due to the formation of AgOH.

Answer the following :- An artificial satellite orbiting the earth in very thin atmosphere loses its energy gradually due to dissipation against atmospheric resistance, however small. Why then does its speed increase progressively as it comes closer and closer to the earth ?