Absolute zero is A. the temperature at which the motion of particles theoretically ceases. B. defined as 0°C. C. the triple point for water. D. all of the above

Answers

Answer 1

Answer:

The correct answer is A. The temperature at which the motion of particles theoretically ceases.

Explanation:

The term "absolute zero" is used to refer to a temperature (degree of heat) in which particles have no movement or only minimal vibration as in this temperature the energy of particles is affected. Due to this, the absolute zero is one of the lowest temperatures that exists as it is equivalent to -273 °C or -459 °F, although it has been proved temperature can be even lower at certain circumstances. According to this, "absolute zero" is mainly defined by the lack of motion in particles and thus, the correct answer is "he temperature at which the motion of particles theoretically ceases".

Answer 2

Answer: Absolute zero is the temperature at which the motion of particles that constitute heat will be minimal. The answer is A. It is the lowest temperature that is theoretically possible. It is zero on the kelvin scale, but equivalent to -273.15°C. Hope i helped.

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Describe the theory of plate tectonics

Answers

Answer:

The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.

Explanation:

From Google

Why would an electrician use parallel circuits to wire the lights in each room of a house instead of using a series circuit?A.
When electricians get their license, they are only licensed to install parallel circuits. Most electricians aren't certified to install series circuits.

B.
Parallel circuits prevent electrons from flowing if part of the circuit is broken and therefore prevent fires. Series circuits cause more fires because electrons still flow.

C.
Electrons continue to flow in a parallel circuit even if part of the circuit is broken. In a series circuit, a break such as a burned out lightbulb would cause the current to stop in the whole room.

D.
Parallel circuits are much easier to wire and are required by the electrical code for housing construction in most communities. Series circuits are sometimes used with special approval.

Answers

C: Electrons continue to flow in a parallel circuit even if part of the circuit is broken. In a series circuit, a break such as a burned out lightbulb would cause the current to stop in the whole room!

Which of the following in NOT part of the structure of a news story?a. lead
b. climax
c. details
d. explanation

Answers

Answer:

The climax is not a part of a story

Explanation:

The structure of a story consists of three parts:

1.-The lead or the entrance. Main data of the news is presented.

2.-The body. Where it is explained how the events occurred.

3.-The closure. Complementary ideas are presented.

The news is a text whose function is to report a topic or fact. It is characterized by being topical and of public interest. It consists of three parts: input or lead, body and closure. The lead is the core of the news, the most important of the information, where a small summary of what the news will deal with is presented. The body expands the information that was anticipated in the lead by providing new data. And finally the closing, where the information of the news is complemented with some final ideas.

b because you have to lead with something than have details and what you are explaning

Which of the following molecules has a bent structure?A. O2
B. CO2
C. H2O
D. CH4

Answers

Answer : The correct option is, (C) $H_2O$

Explanation :

Formula used:

$\text{Number of electrons}=(1)/(2)[V+N-C+A]$

where,

V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

First we have to determine the hybridization of the following molecules.

(a) $O_2$

This is diatomic molecule and diatomic molecules always form linear shape.

(b) $CO_2$

$\text{Number of electrons}=(1)/(2)* [4]=2$

The number of electrons is 2 that means the hybridization will be $sp$ and the electronic geometry of the molecule will be linear.

(c) $H_2O$

$\text{Number of electrons}=(1)/(2)* [6+2]=4$

The number of electrons is 4 that means the hybridization will be $sp^3$ and the electronic geometry of the molecule will be tetrahedral.

But as there are two atoms around the central oxygen atom, the third and fourth position will be occupied by lone pair of electrons. The repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be bent.

(d) $CH_4$

$\text{Number of electrons}=(1)/(2)* [4+4]=4$

The number of electrons is 4 that means the hybridization will be $sp^3$ and the electronic geometry of the molecule will be tetrahedral.

Hence, the molecule has bent structure will be, $H_2O$

H2O has a bent structure. The oxygen atom is in the center, and the hydrogen atoms are attached but pointing downward. It's not linear because there are two unshared pairs of electrons on oxygen that take up their own spaces.

Which element in the alkali group will have the lowest first ionization energy?

Answers

Fluorine

Explanation:

F- has the lowest ionisation energy

When a neutral atom undergoes oxidation, the atom’s oxidation state(1) decreases as it gains electrons(2) decreases as it loses electrons(3) increases as it gains electrons(4) increases as it loses electrons

Answers

When a neutral atom undergoes oxidation, the atom's oxidation state increases at it lose electrons.

The acronym "OILRIG" can be used to remember this: Oxidation is Losing electrons, Reduction is Gaining electrons. Therefore, when an atom undergoes oxidation, it loses electrons. This makes its net charge more positive, so its oxidation state increases.
This best fits choice (4).

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