Which instrument, a cello or a violin, produces a higher-pitched sound? Explain your answer. ANSWER: A Violin produces a higher-pitched sound because the strings are thinner than a cello's strings. Thinner strings create high pitches. Since a Violin is shorter than a cello the strings are shorter too. Short strings create high pitches too.

{Pitch is affected by the length of the string.
Shorter strings produce higher-pitched sounds than longer strings.
The violin has shorter strings, so it will make a higher-pitched sound.}

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Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

4. rat liver is able to metabolize glucose by both the glycolytic and the pentose phosphate pathway. which of the following are properties of both the glycolytic and pentose phosphate pathway? a. nad+ is involved b. co2 is liberated c. phosphate esters are intermediates d. glyceraldehyde 3-phosphate is an intermediate e. fructose 6-phosphate is an intermediate4. rat liver is able to metabolize glucose by both the glycolytic and the pentose phosphate pathway. which of the following are properties of both the glycolytic and pentose phosphate pathway? a. nad+ is involved b. co2 is liberated c. phosphate esters are intermediates d. glyceraldehyde 3-phosphate is an intermediate e. fructose 6-phosphate is an intermediate

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi