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lutik1710 [3]
3 years ago
11

A wave has a frequency of 46 Hz and a wavelength of 1.7 meters. What is the speed of this wave?

Physics
2 answers:
Sunny_sXe [5.5K]3 years ago
8 0

Answer:

v = 78.2m/s

Explanation:

Check attachment below

Andrej [43]3 years ago
7 0

Explanation:

wavespeed=frequency x wavelength

so

you only need to 46hz*1.7m which equals

<u>7</u><u>8</u><u>.</u><u>2</u><u>m</u><u>/</u><u>s</u>

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Ok so here is the thing. It is necessary to introduce the atomic number Z into the following equation and the reason for that is that we are not working here with hydrogen (H). It will go like this:  
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<span>After that we need to plug the E value calculated into the equation. Remember that the wavelength is always positive:</span>

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3 years ago
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Ann [662]

Answer:

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3 years ago
Consider a 20 cm thick granite wall with a thermal conductivity of 2.79 W/m·K. The temperature of the left surface is held const
kozerog [31]

Answer:

The right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

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Thickness of the wall is  L=  20cm = 0.2m

Thermal conductivity of the wall is  K = 2.79 W/m·K

Temperature at the left side surface is T₁ =  50°C

Temperature of the air is T = 22°C

Convection heat transfer coefficient is  h = 15 W/m2·K

Heat conduction process through wall is equal to the heat convection process so

Q_{conduction} = Q_{convection}

Expression for the heat conduction process is

Q_{conduction} = \frac{K(T_1 - T)}{L}

Expression for the heat convection process is

Q_{convection} = h(T_2 - T)

Substitute the expressions of conduction and convection in equation above

Q_{conduction} = Q_{convection}

\frac{K(T_1 - T_2)}{L} = h(T_2 - T)

Substitute the values in above equation

\frac{2.79(50- T_2)}{0.2} = 15(T_2 - 22)\\\\T_2 = 35.5^\circC

Now heat flux through the wall can be calculated as

q_{flux} = Q_{conduction} \\\\q_{flux}  = \frac{K(T_1 - T_2)}{L}\\\\q_{flux}  = \frac{2.79(50 - 35.5)}{0.2}\\\\q_{flux} = 202.3W/m^2

Thus, the right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

6 0
2 years ago
If the light wave has a wavelength of 10m what would be its velocity
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