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Marta_Voda [28]

3 years ago

14

What is the frequency of a photon with an energy of 1.99 x 10-19 j?

1 answer:

artcher [175]3 years ago

8 0

Give me some answer choices and i will be happy to help

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The slope of a linear velocity-time graph tells us the _____ of the object.

Andrew [12]

Speed of the object !!!!

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3 years ago

It is important that your muscles are very warm when doing this type of stretching.

MaRussiya [10]

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ballistic stretching

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Humans obtain energy in a number of different ways. About half of the electrical energy in the U.S. is generated by burning coal

ivanzaharov [21]

Answer:

C. Burning coal tends to harm the environment more than using solar panels.

Explanation:

When coal is burned, it reacts with the oxygen in the air. This reaction converts the stored potential energy, which turns into thermal energy, which is released as heat. But it also produces methane and carbon dioxide which is released into the air.

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3 years ago

Two parallel conducting plates are separated by 9.2 cm, and one of them is taken to be at a potential of zero volts.What is the

True [87]

Answer:

$E=54V/cm$

$\Delta V=496.8V$ between the plates.

Explanation:

The equation for change of voltage between two points separated a distance d inside parallel conducting plates (<em>which have between them constant electric field</em>) is:

$\Delta V=Ed$

So to calculate our electric field strength we use the fact that the potential 8.8 cm from the zero volt plate is 475 V:

$E=\frac{\Delta V}{d}=\frac{475 V}{8.8cm}=54V/cm$

And we use the fact that the plates are 9.2cm apart to calculate the voltage between them:

$\Delta V=Ed=(54V/cm)(9.2cm)=496.8V$

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3 years ago

The amount of time required for 2 successive wave crests to pass a fixed point is called wave ________.

mihalych1998 [28]

I believe this is known as wave period.
hope this helps!

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3 years ago