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Slav-nsk [51]
3 years ago
7

A tunnel under a river is 2.00 km long. (a) At what frequencies can the air in the tunnel resonate? (b) Explain whether it would

be good to make a rule against blowing your car horn when you are in the tunnel.
Physics
1 answer:
Damm [24]3 years ago
7 0

Answer:

nine

Explanation:

cuz

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1. How is power defined? *
ANEK [815]

Answer:

D. the rate at which work is accomplished

Explanation:

8 0
2 years ago
Two sounds are played for you. The first has a frequency of 196 Hz. The second has a frequency of 392 Hz. Which sound will be "h
kykrilka [37]

Answer:

The second one, the higher the hertz the higher the frequency we hear

Explanation:

5 0
3 years ago
Finish the following sentence. almost all of the oxygen (o2) one consumes in breathing is converted to _____________.
ludmilkaskok [199]
The answer is carbon dioxide (CO2)
6 0
3 years ago
A barometer accidentally contains 6.5 inches of water on top of the mercury column (so there is also water vapor instead of a va
Alisiya [41]

Answer:

(a). 14.4 lbf/in^2.

(b). 27.8 in, AS THE TEMPERATURE INCREASES, THE LENGTH OF MERCURY DECREASES.

Explanation:

So, from the question above we are given the following parameters which are going to help us in solving this particular Question;

=> The "barometer accidentally contains 6.5 inches of water on top of the mercury column (so there is also water vapor instead of a vacuum at the top of the barometer)"

=> "On a day when the temperature is 70oF, the mercury column height is 28.35 inches (corrected for thermal expansion)."

With these knowledge, let us delve right into the solution;

(a). The barometric pressure = water vapor pressure + acceleration due to gravity (ft/s^2) × water density(slug/ft^3) × {ft/12 in}^3 × [ height of mercury column + specific gravity of mercury × height of water column].

The barometric pressure= 0.363 + {(62.146) ÷ (12^3) × 390.6425}. = 14.4 lbf/in^2.

(b). { (13.55 × length of mercury) + 6.5 } × (62.15÷ 12^3) = 14.4 - 0.603.

Length of mercury = 27.8 in.

AS THE TEMPERATURE INCREASES, THE LENGTH OF MERCURY DECREASES.

7 0
3 years ago
Three objects of the same mass begin their motion at the same height. One object falls straight down, one slides down a low-fric
erik [133]

Answer:

D. Same

Explanation:

Because only gravity is doing the work on the objects, and gravity is constant for all the objects

4 0
3 years ago
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