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Cloud [144]
3 years ago
6

Identify the magnetic north pole of Earth’s magnet?

Physics
2 answers:
choli [55]3 years ago
8 0
Yeah I wouldn’t have known lol
jarptica [38.1K]3 years ago
5 0
If am reading this question right the answer should be south pole
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Explanation:

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The average distance between the variable scores and the mean in a set of data is the __________. A. range B. standard deviation
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The average distance between the variable scores and the mean in a set of data is the standard deviation.

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Two circular holes, one larger than the other, are cut in the side of a large water tank whose top is open to the atmosphere. Ho
lidiya [134]

Answer:\frac{r_1}{r_2}=1.565

Explanation:

Given

two holes are made with different sizes

Hole 1 is large in size and hole 2 is small

If the volume flow rate of water is same for both the hole then small hole must be below the large hole because for same flow rate, velocity of water is large while cross-sectional area is small so it compensate to give same flow for both the holes.

Now for radius apply Bernoulli's theorem at hole 1 and 2

P_1+\rho gh_1=P_{atm}+\frac{1}{2}\rho v_1^2

P_2+\rho g6h_2=P_{atm}+\frac{1}{2}\rho v_2^2

if hole 1 is h distance below water surface then h_2=6h

and P_1=P_2=P_{atm}

Also v_1=\sqrt{2gh}

v_2=\sqrt{2g(6h)}

and Q=A_1v_1=A_2v_2

A=\pi r^2

thus \dfrac{r_1}{r_2}=\sqrt{\dfrac{v_2}{v_1}}

\dfrac{r_1}{r_2}=\sqrt{\dfrac{\sqrt{6h}}{\sqrt{h}}}

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3 years ago
a train traveling at 72 km/h crosses a platform in 30 seconds what is the length of the platform in meters
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2 years ago
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Serhud [2]

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1) The medium b has higher optical density.

2) If the optical densities of both A and B are same.

Explanation:

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  2. The higher refractive index means slower propagation of the light in that medium.
  3. The refractive index of the medium determines the optical density of the medium.
  4. If the material has a higher refractive index, then its optical density is high.
  5. If the material has a low refractive index, then its optical density is low.
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