Weegy: If the frequencies of two component waves are 24 Hz and 20 Hz, they should produce 4 beats per second.
User: If a string vibrates at the fundamental frequency of 528 Hz and also produces an overtone with a frequency of 1,056 Hz, this overtone is the
A. third harmonic.
B. second harmonic.
C. fourth harmonic.
D. first harmonic.
Weegy: If a string vibrates at the fundamental frequency of 528 Hz and also produces an overtone with a frequency of 1,056 Hz, this overtone is the second harmonic.
User: The rare earth elements include
A. the lanthanide series and the alkali metals.
B. the actinide series and the alkaline earth metals.
C. the alkali metals and the transition metals.
D. the lanthanide series and the actinide series.
Weegy: The rare earth elements include the lanthanide series and the actinide series.
User: Which of the following is one way to prevent the corrosion of iron?
A. Protect the iron from polluted air.
B. Paint exposed iron parts with protective paint.
C. Let the iron develop a natural coat of carbonate.
D. Add carbon to the iron.
Weegy: Paint exposed iron parts with protective paint is one way to prevent the corrosion of iron.
User: Which of the following accurately describes properties of valence?
A. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers.
B. Metals tend to have a negative valence and tend to be electron borrowers.
C. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom.
D. The smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom
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