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sukhopar [10]
4 years ago
9

The lowest pitched sounds humans can generally hear have a frequency of roughly 20hz. what is the approximate wavelength of thes

e sound waves if their wave speed is 340m/s my
Physics
1 answer:
pantera1 [17]4 years ago
8 0

Wave speed  =  (wavelength) x (frequency)

     (340 m/s)  =  (wavelength) x (20/sec)

     (340 m/s) / (20/sec)  =  Wavelength

           17 meters            =  Wavelength

         (almost 56 feet !)
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A closed, uninsulated system fitted with movable piston, so no matter is exchanged with the surroundings, was assembled. Introdu
xeze [42]

Answer: You do not specify what is being asked for. ∆E? ∆H?

∆E = (430 - 238) J = 192 J

∆H = 430 J

Explanation:

If asked for the value of ∆H the answer is simply the change in heat, and in the question, it states introduction of 430 J of heat is causing the system to expand.

Therefore ∆H = 430 J

If asked for ∆E, we know that ∆E = ±q (heat) + work (-P∆V) = ±q + w

The question states that 238 J of work are done AND the system expanded

(work is negative because expansion means work is done BY the system, releasing energy/heat... Conversely, if the system were compressed, work is done ON the system, absorbing heat/energy)

Therefore, ∆E = (430 - 238) J = 192 J

8 0
2 years ago
In what state of matter are particles vibrating and moving at high speeds?
VARVARA [1.3K]

Answer:

Gas

Explanation:

6 0
3 years ago
What are the seven different forms of energy? Give an example of each.
wel

Answer:

Form of energy: Example

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2. Nuclear energy: Nuclear fission

3. Chemical energy: Energy stored in plant matter

4. Electrical energy: Lightning

5. Thermal energy: A hot surface

6. Sound energy: A tuning fork

7. Solar energy: Energy from the Sun

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5 0
3 years ago
Which goes into which category?
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Evidence of Chemical Change:

A car rusting

Leaves changing in October

The glow of a light bulb

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Yellow and blue paints mixed together

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Hope this helps!

Have a great day!

6 0
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Which statement provides the best description of a computational model?
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