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Anarel [89]
3 years ago
13

What is the speed of sound in air at 40°C?

Physics
2 answers:
Lilit [14]3 years ago
6 0
The speed of sound in air at 40 degree C is 355 m/s
Blababa [14]3 years ago
4 0
343 meters per second Is the answer
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In a physics laboratory experiment, a coil with 200 turns enclosing an area of 11.8 cm^2 is rotated during the time interval 4.9
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Answer:

Explanation:

Flux through the coil = nBA , n is no of turns , B is magnetic flux and A a is area of the coli

= 200 x 5.6 x 10⁻⁵ x 11.8 x 10⁻⁴

=  13216 x 10⁻⁹ weber .

b ) When the coil becomes parallel to magnetic field  , flux through it will become zero.

c ) e m f induced = change in flux / time

= 13216 x 10⁻⁹ / 4.9 x 10⁻²

= 2697.14 x 10⁻⁷ V

= 269.7 x10⁻⁶

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3 years ago
If the window is 11 m above the ground, find the time the stone is in flight.
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d=vi*t+(1/2)gt²

d=11 m
g=9.8 m/s²
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11 m=0 m/s*t+(1/2)9.8 m/s²t²
11 m=4.9 m/s²t²
t²=11 m / 4.9 m/s²
t=√(11 m / 4.9 m/s²)=1.489... s≈1.5 s

Answer: the time the sone is in flight is 1.5 s
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A person that is sleeping on her stomach rolls over so that she is now sleeping on her back. The person moved from the ________
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Explanation:

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Which of the following is true about conduction? Question 2 options: It is heat transfer through direct contact It can only occu
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through direct contact

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took the test!

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