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Anastaziya [24]
3 years ago
14

PLEASE HELP THIS IS URGENT!!!!! 50 POINTS!!!

Physics
2 answers:
zhannawk [14.2K]3 years ago
8 0

Answer:

1 wave-153 m/s

2 wave-162 m/s

3 wave-171 m/s

4 wave-175 m/s

5 wave-190 m/s

6 wave-202 m/s

7 wave-223 m/s

8 wave-238 m/s

avg speed-188 m/s

Explanation:

How close was your average speed to the calculation of the actual value for the speed of sound in m/s? Give 2 examples of errors that may have occurred during the lab that could have caused your value to be different than the value that you determined using the equation.

My average is pretty close to the actual value.

2 errors that may occur, are, not adding a temperature, and measuring in sm instead of m.

Hope it helps, i got 100 percent on my assigment with this answer.

Alja [10]3 years ago
6 0
What math class are you in I think I can help
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According to Coulomb's law, what happens to the attraction of two oppositely charged objects as their distance of separation inc
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Answer:

Option B. Decreases

Explanation:

Coulomb's law states that:

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From the formula:

F = Kq₁q₂ / r²

The force of attraction (F) is inversely proportional to the square of their separating distance (r).

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Option B gives the right answer to the question.

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147.5 ml of ethyl alcohol (coefficient of volume expansion = 1120 x 10-6K-1) at a temperature of 273.1 K is measured into a 150.
marishachu [46]

Answer:

288.2 K

Explanation:

\beta = Volumetric expansion coefficient = 1120\times 10^{-6}\ /K

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T_f = Final temperature

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Change in volume is given by

\Delta v=\beta v_0(T_f-T_i)\\\Rightarrow T_f=\frac{\Delta v}{\beta v_0}+T_i\\\Rightarrow T_f=\frac{150-147.5}{1120\times 10^{-6}\times 147.5}+273.1\\\Rightarrow T_f=288.2\ K

The temperature of the ethyl alcohol should be 288.2 K to reach 150 mL

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