If the environmental lapse rate is 5o C per 1,000 m and the temperature at the earth's surface is 25o
C, then the air temperature at 2,000 m above the ground is 20o C. Indicate whether the statement is true or false.
false
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Indicate whether this statement is true or false.
It is theorized that a pulsar only emits X-rays and visible light during its early history. What do you suppose is the basis of this theory?
A. As the pulsar's energy dissipates, the frequency of the energy it emits drops. B. X-rays are likely the result of radioactive decay, which only can occur in a pulsar's early history. C. The pulsar's high rate of spin produces a magnetic field that, over time, slows the pulsar down. D. X-rays and visible light are both part of the electromagnetic spectrum.
Why does graphite feel slippery to the touch?
A) Graphite is soft and easily crushes into powder. B) Graphite atoms have many free electrons. C) Graphite absorbs water from the air so the surface always feels slippery. D) The carbon atoms in graphite are spaced closely together.
During nuclear fusion on a protostar, ____________ atoms fuse to form helium atoms. Fill in the blank(s) with the appropriate word(s)