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3 years ago

Which statement best describes the difference(s) between atoms and molecules?

Physics

2 answers:

trasher [3.6K]3 years ago

8 0

Answer:

The answer is A

Explanation:

-Dominant- [34]3 years ago

3 0

Answer:

Atoms are the most basic units of an element whereas molecules are atoms that are chemically bonded together.

Explanation:

The atoms are made up of protons, neutrons, and electrons that are the basic constituents of matter.
The atoms occur in nature as single or bonded.
The inert gases are the atoms that they occur as the individual atoms in nature.
All other atoms in nature are bonded to the same elements or different elements and form molecules.
Hence, atoms are the most basic units of an element whereas molecules are atoms that are chemically bonded together.

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A plane electromagnetic wave travels northward. At one instant, its electric field has a magnitude of 3.7 V/m and points eastwar

UNO [17]

Answer:

Magnetic field, B = $1.24\times 10^{-8}\ T$ (eastwards)

Explanation:

Given that,

The magnitude of electric field, E = 3.7 V/m

A plane electromagnetic wave travels northward. We need to find the magnitude and direction of the magnetic field at this instant.

The relation between the magnetic field and the electric field of the plane electromagnetic wave is given by :

$B=\dfrac{E}{c}$

c is the speed of light

$B=\dfrac{3.7}{3\times10^8}\\\\B=1.24\times 10^{-8}\ T$

So, the magnetic field is $1.24\times 10^{-8}\ T$ . The direction of magnetic field is perpendicular to the electric field and the direction of wave propagation. Hence, the direction of magnetic field is eastward.

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3 years ago

A motor neuron and all of the skeletal muscle fibers it stimulates are termed a

iragen [17]

Answer:

Motor Unit

Explanation:

6 0

3 years ago

A mirror forms an image because of which behavior of light?

Sveta_85 [38]

The correct answer is refraction.

4 0

3 years ago

A 20-kg block slides down a fixed rough curved track The block has a speed of 5 0 m/s after its height above a horizontal surfac

Crank

Answer:

U = 102.8 J (100 J to two significant digits)

Explanation:

potential energy converted = 20(9.8)(1.8) = 352.8 J

kinetic energy at base of track = ½(20)5.0² = 250 J

energy (work) of friction 352.8 - 250 = 102.8 J

8 0

3 years ago

What is the inverse square law and how does it relate to gravity?

Nesterboy [21]

Answer:

Inverse Square Law Newton proposed the Inverse Square Law. The effect of gravity (and also on forces such as sunlight) works like this. If say we have a half-mass Earth, it would produce a gravity of not half but a quarter (the square of 2).

7 0

3 years ago