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qaws [65]
3 years ago
7

Frequency more than 20,000 HZ​

Physics
2 answers:
Ilya [14]3 years ago
6 0

Answer:

dvhd

Explanation:

xhxjjdvcbxhjddvifidid

Leviafan [203]3 years ago
5 0

Answer:

The units of frequency are called hertz (Hz). Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz. Frequencies above 20,000 Hz are known as ultrasound

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A long distance runner sees the finish line and accelerates at a rate in 1.2 m/s2 for
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Answer: he did travel 15 meters.

Explanation:

We have the data:

Acceleration = a = 1.2 m/s^2

Time lapes = 3 seconds

Initial speed = 3.2 m/s.

Then we start writing the acceleration:

a(t) = 1.2 m/s^2

now for the velocity, we integrate over time:

v(t) = (1.2 m/s^2)*t + v0

with v0 = 3.2 m/s

v(t) = (1.2 m/s^2)*t + 3.2 m/s

For the position, we integrate again.

p(t) = (1/2)*(1.2 m/s^2)*t^2 + 3.2m/s*t + p0

Because we want to know the displacementin those 3 seconds ( p(3s) - p(0s)) we can use p0 = 0m

Then the displacement at t = 3s will be equal to p(3s).

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3 years ago
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Vaselesa [24]

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A group of letters used at the start of a word to change its meaning?
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A passenger in a helicopter traveling upwards at 15 m/s accidentally drops a package out the window. If it takes 15 seconds to r
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The helicopter was 1103.63 meters high when the package was dropped.

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