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blagie [28]
3 years ago
15

Rebecca tells tom that he is singing “off pitch.” rebecca is referring to which physical property of sound?

Biology
1 answer:
Ray Of Light [21]3 years ago
6 0

Rebecca tells Tom that he is singing “off pitch.” Rebecca is referring to Frequency of sound.

Frequency is measured as the number of wave cycles that occur in one second. It is defined as the speed of the vibration and this further determines the pitch of the sound. This is usually useful for musical sounds where there is a strong waveform.

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PART II
Sidana [21]

Answer:

Iron -> Fe - Group 8

Silver -> Ag - Group 11

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Oxygen -> O - Group 16

Gold -> Au - Group 11

Potassium -> K - Group 1

Xenon -> Xe - Group 18

Magnesium -> Mg - Group 2

Hydrogen -> H - Group 1

4 0
3 years ago
Griffith, in his 1928 experiments, demonstrated that bacterial strains could be genetically transformed. The evidence that DNA w
Nadusha1986 [10]

Griffith's experiment worked with two types of pneumococcal bacteria (a rough type and a smooth type) and identified that a "transforming principle"  could transform them from one type to another.

At first, bacteriologists suspected the transforming factor was a protein. The "transforming principle" could be precipitated with alcohol, which showed that it was not a carbohydrate. But Avery and McCarty observed that proteases (enzymes that degrade proteins) did not destroy the transforming principle. Neither did lipases (enzymes that digest lipids). Later they found that the transforming substance was made of nucleic acids but ribonuclease (which digests RNA) did not inactivate the substance. By this method, they were able to obtain small amounts of highly purified transforming principle, which they could then analyze through other tests to determine its identity, which corresponded to DNA.

6 0
3 years ago
What are the two reactants and two products for the process of photosynthesis?
aniked [119]
The two reactants are carbon dioxide and water.
The two products are oxygen and glucose.

Hope this helps!
8 0
3 years ago
What are substances that do not dissolve called
KonstantinChe [14]

its called a solution

hope it helped

4 0
3 years ago
Which of the following events can result in inheritable genetic variations in organisms
Svetlanka [38]

The right answer is B.

The answer B is the only proposition which specified at which stage the event must occur, in fact, the meiosis.

Meiosis is a characteristic division of reproductive cells that can generate gametes to form new species (desendence). So if a mutation occurs at this time (such as recombinations) it will inevitably be inherited.

3 0
3 years ago
Read 2 more answers
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