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Marina86 [1]
3 years ago
7

A fanis rotating at a constant 360.0 rev/min. What is the magnitude of the acceleration of a point on one of its blades 10.0 cm

from the axis of rotation?

Physics
1 answer:
Mariana [72]3 years ago
4 0

Answer:

142m/s2

Explanation:

The solution is in the attached file below

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Consider the electronic elements that are cooled by forced convection in Problem 6.31. The cooling system is designed and tested
Stella [2.4K]

Answer:

surface temperature of the chip located 120 mm Ts=42.5°C

surface temperature of the chip in Mexico Ts=46.9°C

Explanation:

from the energy balance equation we have to:

q=E=30W

from Newton´s law:

Ts=Tα+(q/(h*A)), where A=l^2

N=h/k=0.04*(Vl/V)^0.85*Pr^1/3

data given:

l=0.12 m

v=10 m/s

k=0.0269 W/(m*K)

Pr=0.703

Replacing:

h=0.04*(0.0269/0.12)*(10*0.12)/((16*69x10^-6))^0.85*(0.703^1/3) = 107 W/m^2*K

The surface temperature at sea level is equal to:

Ts=25+(30x10^-3/107*0.004^2)=42.5°C

h=0.04*(0.0269/0.12)*((10*0.12)/(21*81x10^-6))^0.85*(0.705^1/3)=85.32 W/(m*K)

the surface temperature at Mexico City is equal to:

Ts=25+(30x10^-3/85.32*0.004^2)=46.9°C

8 0
3 years ago
How do i figure out the net force of an object? explain please :)
Savatey [412]
Draw a free body diagram to help you visualize. draw the object and use arrows to label and determine where all the forces acting upon it will be. then u add up the sum of all forces. if two forces of equal magnitude and opposite directions will cancel each other out.
3 0
3 years ago
You overhear two students discussing the topic of Doppler shift.
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Answer:

agree with student 2, disagree with student 1

Explanation:

If you want to know if the wavelength of light was shifted you have to know the original wavelengths

Since we know the absorption spectrum for elements like hydrogen, we can look for these absorption lines in the star's spectra and figure out what direction these lines are shifted and tell if the star is moving away or towards us

The color of the star refers to the temperature of the star's surface which is not related to the doppler shift of the star

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Which of the following is the best way to make a conclusion? A. The experiment must be manipulated until the results show what y
Genrish500 [490]

Answer:

D

Explanation:

You should compare your results and data with your original hypothesis.  It is okay to have a hypothesis that was shown to be false.  That's science. Things do not always work out.  You can always discuss what you could have done differently and things that went wrong.  There is no right answer in science!

7 0
3 years ago
How is the polarization of an electromagnetic wave defined? Group of answer choices The polarization is defined by the plane in
Anarel [89]

Answer:

The polarization is defined by the plane in which the electric field is oscillating.

Explanation:

The polarization of an electromagnetic wave depends on the direction of the electric field. If the electric component is oscillating along the x-axis, the polarization will also be along the x-axis.

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<u>The polarization is defined by the plane in which the electric field is oscillating.</u>

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