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Bond [772]
3 years ago
8

Which of the following identifies the number of protons in an atom?

Physics
1 answer:
Lunna [17]3 years ago
8 0

Answer:

The number of protons can be found by looking at the atomic number

Explanation:

Its at the very top of the little element box

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How much energy goes toward kinetic energy
kirill [66]

kinetic is moving

so kinetic energy is something that moves

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3 years ago
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The angle of incidence of a light beam in air onto a reflecting surface is continuously variable. The reflected ray is found to
Mariana [72]

Answer:

  n = 2.0686

Explanation:

When an unpolarized ray of light is reflected on a surface, the reflected ray is partially polarized, complete polarization occurs when it is true that between the transmitted and reflected ray one has 90, the relationship is

        n = so tea

 let's calculate

        n = tan 64.2

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8 0
3 years ago
A
malfutka [58]

Answer:

<em>The penny will hit the ground at 6.39 seconds</em>

Explanation:

<u>Free Fall</u>

The penny is dropped from a height of y=200 m. The equation of the height on a free-fall motion is given by:

\displaystyle y=\frac{gt^2}{2}

Where g=9.8\ m/s^2, and t is the time.

Solving for t:

\displaystyle t=\sqrt{\frac{2y}{g}}

Using the value y=200:

\displaystyle t=\sqrt{\frac{2*200}{9.8}}

t=6.39 sec

The penny will hit the ground at 6.39 seconds

4 0
3 years ago
An electromagnet is created using a battery, an insulated copper wire and an iron nail. The wire is wrapped around the nail 20 t
Molodets [167]
I think adding more loops would strengthen it
4 0
2 years ago
How does speed measure​
kvv77 [185]

Answer:

Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour. For air and marine travel the knot is commonly used.

Explanation:

Plz give brainliest!

4 0
3 years ago
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