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xxMikexx [17]
3 years ago
10

The speed of sound in hydrogen gas at room temperature is

Physics
1 answer:
Sergeeva-Olga [200]3 years ago
8 0

Answers:

b. 2222 Hz

c. 2777 Hz

d. 2962 Hz

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A car passes point “A” and then 120 meters later. It’s velocity was measured 21 m/s. If it’s acceleration was constant at 0.853
Norma-Jean [14]

Recall that

{v_f}^2-{v_i}^2=2a\Delta x

where v_i and v_f are the initial and final velocities, respecitvely; a is the acceleration; and \Delta x is the change in position.

So we have

\left(21\dfrac{\rm m}{\rm s}\right)^2-{v_i}^2=2\left(0.853\dfrac{\rm m}{\mathrm s^2}\right)(120\,\mathrm m)

\implies v_i\approx\boxed{15.4\dfrac{\rm m}{\rm s}}

(Normally, this equation has two solutions, but we omit the negative one because the car is moving in one direction.)

7 0
3 years ago
Why can scientists ignore the forces of attraction between particles in a gas under ordinary conditions? They are too weak to ha
Liono4ka [1.6K]

They are too weak to have an effect at the temperatures at which most gases exist.

5 0
3 years ago
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*Physical Science* *E2020* *Unit Test*
vladimir2022 [97]

i think its b

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5 0
3 years ago
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What is the system's potential energy when its kinetic energy is equal to 34e?
mixer [17]
Otal energy= PEmax on the spring = KEmax of the oject 
<span>Total Energy= KE+PE at v or x not maximum. </span>

<span>Using the second line </span>
<span>E= 3/4 E + PE </span>
<span>PE = 1/4 E </span>


<span>PEmax =E = 1/2 kA^2 </span>
<span>PE=E/4 = (1/2)kA^2 / 4= kA^2/8 
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Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

8 0
3 years ago
PLS HELP ME<br> I NEED HELP ASAP
Tanzania [10]

Answer:

  1. In order to find average velocity we use the equation:
  2. avg =  \frac{change \: in \: x}{change \: in \: time}
  3. She went from 4.0m to 16.0 m making her delta x = 12.0 m
  4. She did that in 4s
  5. Hence 12/4 = 3 m/s

8 0
3 years ago
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