Molecules in the interstellar medium emit radiation at what wavelengths?
a. radio
b. microwave
c. visible light
d. ultraviolet
e. X-ray
a
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_________corrosion is the dissolution of a metal that occurs when it is electrically connected to a more noble metal in an electrolyte.
Fill in the blank(s) with the appropriate word(s).
What causes the outward gas pressure that balances the inward pull of gravity in a main-sequence star?
a. the rapid outward flow of gas b. the rapid inward flow of the gas c. the high temperature of the gas d. the high density of the gas e. the high temperature and the high density of the gas
Water is flowing through a V-shaped weir, which has a 30° vertex
The flow rate is 7.0 x 104 kg/s and the speed of the flow is 5.0 m/s. What is the distance from the surface of the water to the vertex? A) 3.6 m B) 7.2 m C) 4.8 m D) 9.6 m E) 14.4 m
A pool is filled to a depth of 2.0 m. How deep does the pool appear to be from above the water?
A) 1.5 m B) 1.33 m C) -2.0 m D) 3.0 m E) -1.5 m