Answer:
The refraction of light at the surface of water makes ponds and swimming pools appear shallower than they really are. A 1m deep pond would only appear to be 0.75 m deep when viewed from directly above. When light emerges from glass or water into air it speeds up again.
Explanation:
The acceleration is inmx/s2
True is the correct answer
The british won the Battle of Barren Hill :)
Answer:

Explanation:
I = Hearing intensity = 
A = Area = 
d = Diameter = 7.9 mm
r = Radius = 
Power is given by

t = Time the eardrum is exposed to sound = 1 second
Energy is given by

The energy transferred to the eardrum is 