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astra-53 [7]
3 years ago
10

Baseboard heaters are basically electric resistance heaters and are frequently used in space heating. A homeowner claims that he

r 5-year-old baseboard heaters have a conversion efficiency of 100%. Is this claim in violation of any thermodynamic laws? Explain.
Physics
1 answer:
sveta [45]3 years ago
7 0

Answer:

No

Explanation:

The work that can be turned into heat equals 100% and there is no thermodynamic law that says that cannot be.

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A clindrical rod of uniform density is located with its center at the origin, and its axis along the axis. It rotates about its
zhenek [66]

Answer:

6093.2328 J

Explanation:

For cylindrical rod moment of inertia will be

I_X=I_Y=\frac{1}{12}m(3r^2+h^2)

I_X=I_Y=\frac{1}{12}\times 4(3\times 0.06^2+0.6^2)=0.1236 kg -m^2

we have given time =0.02 sec

Angular speed =\frac{2\pi }{T}=\frac{2\times 3.14}{0.02}=314\ rad/sec

Rotational KE = \frac{1}{2}I\omega ^2=\frac{1}{2}\times 0.1236\times 314^2=6093.2328\ J

5 0
4 years ago
When a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude f = ax, where a is a constant. th
Veseljchak [2.6K]
Given:
F = ax
where
x = distance by which the rubber band is stretched
a =  constant

The work done in stretching the rubber band from x = 0 to x = L is
W=\int_{0}^{L} Fdx = \int_{0}^{L}ax \, dx = \frac{a}{2}  [x^{2} ]_{0}^{L} =  \frac{aL^{2}}{2}

Answer:  \frac{aL^{2}}{2}

4 0
4 years ago
Determine the frequency of light whose wavelength is 4.257 x 10-7 cm
marin [14]

v =  f (wavelength)i don't know what symbol ya'll use for wavelength so i just put the word instead.We use the greek symbol lambda.So just plug in everything you know.
wavelength=4.257×10^-7x10^-2 and
v=speed of light = 3×10^8
So you should get f= 7.04 ×10^15Hz
7 0
3 years ago
Two grocery carts have the same initial total momentum. The two carts collide, and now cart B has a greater final velocity.
Angelina_Jolie [31]

Answer:

Cart B has a smaller mass

Explanation:

I may be wrong but if mass is decreased then acceleration increases, and if velocity increases then acceleration increases so my logic is that if mass decreases then velocity increases.

7 0
3 years ago
Read 2 more answers
What kind of lenses are in a light microscope
dedylja [7]
There is the ocular lens and the convex lens.
4 0
4 years ago
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