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Stolb23 [73]
3 years ago
6

Please answer the question in the picture, worth 25 points

Physics
1 answer:
viktelen [127]3 years ago
5 0

Answer:

Option C, increases and decreases

Explanation:

When an object making noise approaches you, the wave frequency increases leading to a higher pitch. Conversely, when it moves away from you or retreats, the wave frequency decreases leading to a lower pitch. This can be observed in ambulance sirens.

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A police car is located 50 feet to the side of a straight road. A red car is driving along the road in the direction of the poli
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Answer:74.33 feet per sec

Explanation:

Given

Police car is 50 feet side of road

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Distance between them is decreasing at the rate of 70 feet per sec

From figure

x^2+y^2=z^2

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as the red car is moving

therefore its velocity magnitude is given by

\frac{\mathrm{d} x}{\mathrm{d} t}

2x\times \frac{\mathrm{d} x}{\mathrm{d} t}+0=2z\frac{\mathrm{d} z}{\mathrm{d} t}

x\frac{\mathrm{d} x}{\mathrm{d} t}=z\frac{\mathrm{d} z}{\mathrm{d} t}

140\times \frac{\mathrm{d} x}{\mathrm{d} t}=148.66\times 70

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Which statement is the contrapositive of:
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Why do the planets appear in different locations in the night sky while the pattern of stars in a constellation stays the same?
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