A clear plastic sandwich bag filled with water can act as a crude converging lens in air. If the bag is filled with air and placed under water, the effective lens is

1.converging
2.diverging


2

Physics & Space Science

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The lower the frequency of the electromagnetic wave, the shorter its wavelength.

Answer the following statement true (T) or false (F)

Physics & Space Science

A hunter wishes to cross a river that is 1.5 km wide and flows with a velocity of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 12 km/h with respect to the water. What is the minimum time for crossing?

Physics & Space Science

A guitar string 0.650 m long has a tension of 61.0 N and a mass per unit length of 3.00 g/m. (a) What is the speed of waves on the string when it is plucked? (b) What is the string's fundamental frequency of vibration when plucked?

What will be an ideal response?

Physics & Space Science

Aristotle believed that natural laws could be understood by

A) experiment. B) logic. C) patterns. D) mathematics.

Physics & Space Science