Ask a stupid question...
By lenith
@lenith (1221)
India
16 responses
@lenith (1221)
• India
26 Nov 06
A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.
@not4me (1711)
• United States
26 Nov 06
A ball is dropped from a window 10 m above the ground at t=0. When it bounces, its rebound speed is 71% of its impact speed. At t = 2 sec, a second ball is released from the
same place. Take g = 10 m/s^2.
After how many bounces will the two balls collide?