A large pipe organ at a church has valves that allow either one end of the pipe to be open and the other end closed, or else both ends open. If when one end is open and the other end is closed the pipe can produce a fundamental frequency of 40 Hz, what will be the fundamental frequency when both ends of the pipe are open?
1.80 Hz
2.40 Hz.
3.20 Hz.
4.10 Hz.
1
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Based on observations of the universal expansion, the age of the universe is about
A) 14,000 years B) 14 million years C) 14 billion years D) 14 trillion years
The term observable universe refers to
A) the portion of the universe that we have so far photographed through telescopes. B) the portion of the universe that can be seen by the naked eye. C) the portion of the universe that is not hidden from view by, for example, being below the horizon. D) the portion of the universe that we can see in principle, given the current age of the universe.
What is so special about the carbonaceous chondrites
a. rich in hydrogen and helium b. rich in organic compounds c. rich in nitrogen d. rich in oxygen e. rich in rare metals, such as gold
A 0.28-kg stone you throw rises 34.3 m in the air. The impulse your hand receives from the stone while it throws the stone is
A.
s, up.B.
s, down.C.
s, up.D.
s, down.E.
s, up.