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2 years ago

P waves can travel through Earth's outer core, but S waves cannot. Because of this, scientists know

Physics

2 answers:

eduard2 years ago

5 0

Answer:

The answer is B

please mark me brainliest

Explanation:

Thepotemich [5.8K]2 years ago

5 0

Answer:

The answer is C

Explanation:

<h2>The outer core is about 1,400 miles thick, and it's made mostly of a combination (called an alloy) of <u><em>iron</em></u> and nickel, along with small amounts of other dense elements like gold, platinum, and uranium.</h2>

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The velocity of waves in a ripple tank is 10 centimeters per second, and standing waves are produced with nodes spaced 3.0 centi

Vsevolod [243]

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4 years ago

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In an RLC series circuit that includes a source of alternating current operating at fixed frequency and voltage, the resistance

maw [93]

Answer:

Capacitive Reactance is 4 times of resistance

Solution:

As per the question:

R = $X_{L} = j\omega L = 2\pi fL$

where

R = resistance

$X_{L} = Inductive Reactance$

f = fixed frequency

Now,

For a parallel plate capacitor, capacitance, C:

$C = \frac{\epsilon_{o}A}{x}$

where

x = separation between the parallel plates

Thus

C ∝ $\frac{1}{x}$

Now, if the distance reduces to one-third:

Capacitance becomes 3 times of the initial capacitace, i.e., x' = 3x, then C' = 3C and hence Current, I becomes 3I.

Also,

$Z = \sqrt{R^{2} + (X_{L} - X_{C})^{2}}$

Also,

Z ∝ I

Therefore,

$\frac{Z}{I} = \frac{Z'}{I'}$

$\frac{\sqrt{R^{2} + (R - X_{C})^{2}}}{3I} = \frac{\sqrt{R^{2} + (R - \frac{X_{C}}{3})^{2}}}{I}$

${R^{2} + (R - X_{C})^{2}} = 9({R^{2} + (R - \frac{X_{C}}{3})^{2}})$

${R^{2} + R^{2} + X_{C}^{2} - 2RX_{C} = 9({R^{2} + R^{2} + \frac{X_{C}^{2}}{9} - 2RX_{C})$

Solving the above eqn:

$X_{C} = 4R$

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3 years ago

How many significant figures does 0.00340 have?

True [87]

Greetings!

"<span>How many significant figures does 0.00340 have?"...

A significant figure is:
-A non zero number
-A zero in between non zero numbers
-Trailing zeros to the right of the decimal point

Therefore, this number has three significant figures:
3,4,0

Hope this helps.
-Benjamin</span>

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3 years ago

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Which of the following will cause an increase in gas pressure in a closed container?

Shalnov [3]

The answer is A. Or the first option. Pressure is changed by lowering the pressure, not reducing the volume. You would assume its C but its A.

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3 years ago

Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One gro

oee [108]

Answer:

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3 years ago