Dogs are able to hear much higher frequencies than humans are capable of detecting. For this reason, dog whistles that are inaudible to the human ear can be heard easily by a dog. If a dog whistle has a frequency of 30000 Hz, what is the wavelength of the sound emitted?

Answers

Answer 1

Answer:

The wavelength of the sound emitted is 3.33 x 10⁵ m.

What is wavelength?

The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave. The wavelength is the reciprocal of the frequency of the wave.

Wavelength λ = 1/f

If a dog whistle has a frequency of 30000 Hz, then the wavelength will be

λ = 1/f

λ = 1/30000

λ = 3.33 x 10⁵ m

Thus, the wavelength of the sound of dog emitted is 3.33 x 10⁵ m

Learn more about wavelength.

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Answer 2

Answer: Wavelength = 1/frequency thus wavelength =1/30000

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Imagine that a tank is filled with water. The height of liquid column is 7 meters and the area is 1.5 square meters (m2). What's the force of gravity acting on the column of water?

Answers

-- The volume of water is (1.5 m² x 7 m) = 10.5 m³

   10.5 m³ = 10,500 liters

   Water mass = (10,500 liters) x (1 kg/liter) = 10,500 kg.

-- "Force of gravity on the water"

= Weight of the water = (10,500 kg) x (9.8 m/s²) = 102,900 newtons

-- Pressure on the bottom of the tank =

   (102,900 newtons) / (1.5 m²)

   = 68,600 nt/m² = 68,600 pascal .

your answer is 102,900 N

i just took the test

How many points does it take to determine a plane? one two three four

Answers

Answer: Three

A plane requires minimum three points for its determination. These three points should be non-collinear or the third point should not lie in same line as made with any two points. By joining two points, a line is formed. A point is one dimensional.

By joining minimum three non-co-linear points, a plane can be formed.

Given three non-collinearpoints in space, they uniquely define a plane. The correct option is C.

Three-dimensional space requires at least three non-collinear points in order to establish a plane. Any additional points would also lie on the plane formed by these three points.

This is due to the fact that a plane is a two-dimensional surface that can go on forever. We define a plane that traverses all three points by joining three non-collinear points.

Their positions when combined result in a flat, continuous surface. More points would simply serve to confirm the plane's definition rather than alter it. Because of this, three points are sufficient to build a plane in three dimensions.

Thus, the correct option is C.

For more details regarding non-collinearpoints, visit:

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Your question seems incomplete, the probable complete question is:

How many points does it take to determine a plane?

A. one

B. two

C. three

D. four

The modern periodic table is arranged in order of increasing atomic

Answers

The periodic table is in increasing atomic mass. Hope this helped.

yes your statement is true hopeful this helped you a little

PLEASE HELP!! Use the information below to solve this problem: A note has a wavelength of 0.65551 m. If the speed of sound is 343.00 m/s, what pitch is this note? speed of sound in air: 343 m/s

A. 440.00 Hz
B. 493.88 Hz
C. 523.25 Hz
D. 587.33 Hz
E. 659.26 Hz
F. 698.46 Hz
G. 783.99 Hz