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2 years ago

What elements are solid liquid and gas at room temperature?

1 answer:

3 0

Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules.

Titanium, Lead, Potassium, and Silicon are solids at normal temperature.

Mercury and bromine (Br) are the only liquid elements at standard pressure and temperature (Hg).

<h3>What are chemical elements?</h3>

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

To learn more about chemical elements visit:

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The simplest form of a traveling electromagnetic wave is a plane wave. For a wave traveling in the x direction whose electric fi

e-lub [12.9K]

Answer:

please the answer below

Explanation:

A general electromagnetic plane wave, traveling in the x direction, can be expressed in the form:

$\vec{E}=E_0e^{-i(k\cdot x-\omega t)}\hat{j}\\\\\vec{B}=B_0e^{-i(k\cdot x-\omega t)}\hat{k}\\\\$ (1)

a. amplitudes

from (1) we can observe that E_0 and B_0 are the amplitudes.

2. frequency

By replacing (1) we obtain:

$\vec{E}=E_0e^{-i(k(0)-\omega t)}\hat{j}=E_0[cos\omega t+sin\omega t]\hat{j}$

the wave respond to the followinf physical variables: amplitude, frequency, time and position, as we can see in (1).

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3 years ago

Ulleksa [173]

The correct answer is C. Universal Gravitation (it was written by Issac Newton)

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4 years ago

While an object is in projectile motion (with upward being positive) with no air resistance ct is in projectile motion (with upw

andrew11 [14]

Answer:

The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to -g.

Explanation:

This is because, the projectile has both vertical and horizontal components of velocity. But, its vertical component of velocity changes as the object moves whereas, its horizontal component of velocity remains constant.

Also, the projectile has only vertical component of acceleration and no horizontal component of acceleration since, its horizontal component of velocity remains constant. Thus, no change in the horizontal component of velocity.

The vertical component of acceleration is equal to -g since, the weight is the only vertical force acting on it.

So, <u>the horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to -g.</u>

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3 years ago

How is Newtons second law apply to the egg drop ?

kotykmax [81]

Answer:

Newton's Second Law is applied because of the acceleration caused by natural forces as the egg is plummeting to the earth. And the amount of acceleration the egg has will be largely affected by the amount of force Mr. Baker uses to hurl the egg to the ground.

Explanation:

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