4 years ago

The______ occupies the energy levels of an atom.

1 answer:

maks197457 [2]4 years ago

4 0

The energy levels of an atom is occupied by electrons. Surrounding the nucleus, is an electron cloud, that is where the energy level of an atom exists.Protons and neutrons of the atom can be found in the nucleus.

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a. How many excess electrons must be distributed uniformly within the volume of an isolated plastic sphere 25.0 cm in diameter t

Agata [3.3K]

Answer:

Explanation:

The electric field outside the sphere is given as,

E = k Q /r²

here Q = n x 1.6 x 10⁻¹⁹ C

where n is the number of electons

if the dimeter of sphere d= 25 cm= 0.25 m

then the radius r = 0.125 m

we get

n= E r²/ k x 1.6 x 10⁻¹⁹ C

n = 1350N/C x (0.125m)² / (8.99 x 10⁹ N m²/C² x 1.6 x 10⁻¹⁹ C)

n = 14664731646

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3 years ago

Based on Newton’s 3rd Law of motion, if an archer shoots an arrow at the target, the action force is the bowstring against the a

maw [93]

Answer:

maybe target, not sure.

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3 years ago

What is an example of an electromagnetic wave? Select all that apply. *

Afina-wow [57]

Answer:

A gamma ray, light from a lamp, and a microwave are examples of electromagnetic radiation.

Explanation:

Gamma radiation, visible light (light from a lamp), and microwaves are all apart of the electromagnetic spectrum.

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3 years ago

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tyhe mass of an object is 117 g adding 1200j of heat will raise the temperture of the object by 12 celsius what is the specifc h

Sati [7]

Answer:

C 0.85 j/g*k

Explanation:

The specific heat capacity of a material is given by:

$C_s = \frac{Q}{m \Delta T}$

where

Q is the amount of heat supplied to the object

m is the mass of the object

$\Delta T$ is the increase in temperature of the object

For the object in this problem, we have

m = 117 g is the mass

Q = 1200 J is the heat supplied

$\Delta T=12^{\circ}$ is the increase in temperature

Substituting into the formula, we find the specific heat:

$C_s = \frac{1200 J}{(117 g)(12^{\circ})}=0.85 J/gC$

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4 years ago

Present day Earth is in the _______.

Ira Lisetskai [31]

Present day earth is in the Cenozoic era and the time period for it is 66 million years ago to today.

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4 years ago