3 years ago

Which two energy sources together provide more than 50% of the energy needs of the United States?

Physics

1 answer:

SVEN [57.7K]3 years ago

6 0

Answer:

Petroleum ( over 30% energy )

Natural gas ( over 30% energy )

Explanation:

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Apply the concept of density to explain why oil floats on water.

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Anything less dense than water will float, like oil. Anything more dense than water will sink, like rock.

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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?"...

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3 years ago

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3 years ago

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Which explicit definition matches this sequence? an={10,if n=1an−1−4,if n>1 A. an = 10 + 4(n – 1) B. an = 10 – 4(n – 1) C. an

Step2247 [10]

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3 years ago

A charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a th

Mila [183]

Answer:

$x = a + \frac{a\sqrt2}{\sqrt3 - \sqrt2}$

Explanation:

Position of charge 3q is x = 0

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so here we know that

when two charges are of opposite nature then the electric field will be zero on the line joining the two charges at the position near to smaller magnitude charge

So here the electric field will be zero if the field due to 3q is counterbalanced by field due to -2q

so here we can say

$\frac{k(3q)}{(r+a)^2} + \frac{k(-2q)}{r^2} = 0$