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Misha Larkins [42]
3 years ago
12

Find the speed of sound in air that is 30.0°C. 350 314 18

Physics
1 answer:
laiz [17]3 years ago
3 0

Answer:

v = 350 m/s

Explanation:

The speed of sound depends on the temperature of surrounding. The relation between the speed of sound and the temperature is given by :

v=331+0.61T

Where, T is temperature in Celsius

Here, T = 30 degree Celsius

v=331+0.61\times 30

v = 349.3 m/s

or

v = 350 m/s

Therefore, the speed of sound in air at 30 degrees Celsius is 350 m/s.

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professor190 [17]

Answer:

- 1.07 ft

Explanation:

V1 = (-5, 7, 2)

V2 = (3, 1, 2)

Projection of v1 along v2, we use the following formula

=\frac{\overrightarrow{V1}.\overrightarrow{V2}}{V2}

So, the dot product of V1 and V2 is = - 5 (3) + 7 (1) + 2 (2) = -15 + 7 + 4 = -4

The magnitude of vector V2 is given by

= \sqrt{3^{2}+1^{2}+2^{2}}=3.74

So, the projection of V1 along V2 = - 4 / 3.74 = - 1.07 ft

Thus, the projection of V1 along V2 is - 1.07 ft.

so we need to find the direction of v2

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4 years ago
An astronaut weighs 104 newtons on the moon, where the strength of gravity is 1.6N/kg. What is her mass?
Leona [35]
Her mass is 65 kilograms
5 0
3 years ago
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Answer:

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3 0
3 years ago
A bowling lane is 18 meters long. How long would it take a 1.5 m/s bowling ball to
lara31 [8.8K]

Divide distance by speed:

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5 0
3 years ago
An iron vat is 11 m long at room temperature (20°C). How much longer is it when it contains boiling water at 1 atm pressure?
RoseWind [281]

Answer:

The change in length is 0.01056 m.

Explanation:

Given that,

Length = 11 m

Temperature = 20°C

Pressure = 1 atm

Boiling temperature = 100°C

We need to calculate the length

Using formula of change in linear expansion

\dfrac{\Delta L}{L}=\alpha_{l}\Delta T

\Delta L=L\times\alpha_{l}\times(T_{f}-T_{i})

Put the value into the formula

\Delta L=11\times12\times10^{-6}\times(100-20)

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\Delta L=0.01056\ m

Hence, The change in length is 0.01056 m.

5 0
4 years ago
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