3 years ago

Noah stands 170 meters away from a steep canyon wall. He shouts and hears the echo of his

Physics

1 answer:

bezimeni [28]3 years ago

6 0

340 ms

I got it right and I hope you do as well

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What important component is still scarce for American manufacturers, which had 40 days' worth before the pandemic but only had a

marishachu [46]

Answer:

Microchips

Explanation:

Right now we are in a chip shortage because we do not have enough silicon wafers to make the chips and not enough manufacturers to build them.

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3 years ago

Two point charges, A and B, are separated by a distance of 19.0 cm . The magnitude of the charge on A is twice that of the charg

ankoles [38]

Answer:

QA = 19μC

QB = 9.5 μC

Explanation:

The force that each charge exerts on the other must obey Coulomb's Law, as follows:

$F_{AB} = \frac{k*Q_{A} * Q_{B}}{r_{AB}^{2}} (1)$

We know that the value of the magnitude of FAB is 45.0 N, the distance between QA and QB is 0.19 m, and that QA = 2*QB.
Replacing in (1), we can solve for QB, as follows:

$Q_{B} = \sqrt{\frac{F_{AB}*r_{AB} ^{2}}{2*k} } = \sqrt{\frac{45.0N*(0.19m) ^{2}}{2*9e9N*m2/C2} } = 9.5e-6 C (2)$

Since QA = 2*QB
⇒ QA = 2* 9.5μC = 19.0 μC
⇒ QB = 9.5μC

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3 years ago

Hydrogen and oxygen react to form water. At an atomic level, how do we know that a chemical reaction has occurred?

pshichka [43]

The hydrogen and oxygen atoms regroup into a new molecule.

Hope this helps!!

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2 years ago

Lin Yao looks at the back of a spoon. How should she describe her reflection?

Cerrena [4.2K]

The correct answer is C, right-side up and smaller.

It is the most common example of spherical mirrors. The inside of the spoon acts like a concave mirror and the back side of it like a convex mirror.

A convex mirror always forms a real and diminished image. That is, the image formed is erect or right-side up and smaller in size. Therefore, Lin Yao should describe her reflection on the back side of the mirror to be right-side up and smaller.

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4 years ago

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Draw a Lewis dot structure for Hf<br><br>

Serjik [45]

Answer:

There!!

Explanation:

mark me brainliest!!

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2 years ago