Distance a
7. Classify the following situations
as examples of Newton's first law,
second law and third law. Justify your
classification
A portrait hung on the wall does
not move.
Time
Figure 1.16
b Pushing a child on a swing is much
easier than an adult on it.
A A person pulls a table cloth swiftly and plates and mugs remains on the
table.
d A ball moves fast if kicked hard.
e A bird flaps its wings to fly higher.
C
long has it​

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90