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sammy [17]
2 years ago
14

Một cần trục có trọng lượng Q = 50 kN cẩu vật nặng có trọng lượng P = 10 kN

Physics
2 answers:
lesantik [10]2 years ago
8 0

5

3373727227717177

Explanation:

yun hehew

balu736 [363]2 years ago
7 0

That Vietnam I don't know

about Vietnam

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Use the Electrostatic Series to predict the charges on the following pairs of substances when they are rubbed together:
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Hope this helps! ^^
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How can you tell that toast is not warmed up by conduction?
solmaris [256]

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3 years ago
The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.724 W/m2. What is the maximum va
Hitman42 [59]

Answer:

7.78x10^-8T

Explanation:

The Pointing Vector S is

S = (1/μ0) E × B

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S = (1/μ0) E B

where S, E and B are magnitudes. The average value of the Pointing Vector is

<S> = [1/(2 μ0)] E0 B0

where E0 and B0 are amplitudes. (This can be derived by finding the rms value of a sinusoidal wave over an integer number of wavelengths.)

Also at any instant,

E = c B

where E and B are magnitudes, so it must also be true at the instant of peak values

E0 = c B0

Substituting for E0,

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Solve for B0.

Bo = √ (0.724x2x4πx10^-7/ 3 x10^8)

= 7.79 x10 ^-8 T

5 0
3 years ago
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