2 years ago

True or False: a physical change may produce a new substance.

Physics

2 answers:

expeople1 [14]2 years ago

8 0

Answer:

false

Explanation:

only chemical changes can produce new substances

Reptile [31]2 years ago

6 0

Incorrect aka false

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A 25 N force stretches a spring 280 cm. What was the spring constant?

boyakko [2]

Answer:

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Describe the motion of a swing that requires 6 seconds to complete one cycle. What is its period and the frequency? Round to the

shutvik [7]

Period = 6 seconds and $frequency = 0.167Hz$ .

<u>Explanation:</u>

We have , the motion of a swing that requires 6 seconds to complete one cycle. Period is the amount of time needed to complete one oscillation . And in question it's given that 6 seconds is needed to complete one cycle. Hence ,Period of the motion of a swing is 6 seconds . Frequency is the number of vibrations produced per second and is calculated with the formula of $\frac{1}{t}$ . SI unit of frequency is Hertz or Hz. We know that time period is 6 seconds so frequency = $\frac{1}{t}$

⇒ $frequency = \frac{1}{time}$

⇒ $frequency = \frac{1}{6}$

⇒ $frequency = 0.167Hz$

Therefore , Period = 6 seconds and $frequency = 0.167Hz$ .

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Why is a virus NOT classified as a living thing?

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The correct answer would be B. A virus is living BUT however it does NOT have all of the 7 characteristics of life.

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