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cricket20 [7]
3 years ago
15

When is acceleration positive, negative, and zero? Calculate the average speed if I walk to class at a speed of 20 meters/minute

for the first 2 minutes and run when they start to play 21 savage at a rate of 50 meters/minute for the last 3 minutes.
Physics
1 answer:
Marrrta [24]3 years ago
6 0
Part A: a->positive when velocity is increasing a->negative when velocity is decreasing a->zero when velocity is constant
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A coyote can locate a sound source with good accuracy by comparing the arrival times of a sound wave at its two ears. Suppose a
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Answer:

0.0000109261200583 s

0.0109261200583

Explanation:

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s = Distance between ears = 15 cm

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Distance between the left ear and the bird

d_1=\sqrt{s^2+d_2^2}\\\Rightarrow d_1=\sqrt{0.15^2+3^2}\\\Rightarrow d_1=3.00374765918\ m=3.004\ m

Time

t=\dfrac{Distance}{Speed}

Time difference would be

\Delta T=\dfrac{d_1}{v}-\dfrac{d_2}{v}\\\Rightarrow \Delta T=\dfrac{3.00374765918}{343}-\dfrac{3}{343}\\\Rightarrow \Delta T=0.0000109261200583\ s

The time difference is 0.0000109261200583 s

Time period is given by

T=\dfrac{1}{f}\\\Rightarrow T=\dfrac{1}{1000}\\\Rightarrow T=10^{-3}\ s

The ratio is

\dfrac{\Delta T}{T}=\dfrac{0.0000109261200583}{10^{-3}}\\\Rightarrow \dfrac{\Delta T}{T}=0.0109261200583

The ratio is 0.0109261200583

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