Do falling dominoes form a wave?

Answers

Answer 1

Answer: What do you mean by wave? If you're talking about sound waves, of course.

Answer 2

Answer: they perform sound waves and motion waves

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An atom of potassium has 19 protons and 19 electrons. If the atom loses 1 electron, what willbe the charge on the ion that forms?
Why did the french became allies with the american? Answers: To get revenge for recent French losses in North America To gain territory in the westTo protect the iroquols from British attacks
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When a solution forms, what interactions between particles are involved? Which are exothermic? Which are endothermic? please explain

If a cell is like a city, then city hall, or the control center, would be the cell's ___________.

Answers

Answer: Nucleus. the nucleus has control over the whole cell.

Answer: Nucleus

Explanation:

The cell’s nucleus is what controls all of the cell’s functions, therefore similar to how a city hall controls a city’s functions.

When lithium reacts with bromine to form the compound LiBr each lithium atom(1) gains one electron and becomes a negatively charged ion
(2) gains three electrons and becomes a negatively charged ion
(3) loses one electron and becomes a positively charged ion
(4) loses three electrons and becomes a positively charged ion

Answers

Answer: (3) loses one electron and becomes a positively charged ion

Explanation:

Lithium bromide is formed by combination of lithium cation and bromine anion.

Electronic configuration of lithium:

$[Li]=1s^22s^1$

Lithium atom will loose one electron to gain noble gas configuration and form lithium cation with +1 charge.

$[Li^+]=1s^2$

Electronic configuration of bromine:

$[Br]=[Ar]3d^(10)4s^24p^5$

Bromine atom will gain one electron to gain noble gas configuration and form bromide ion with -1 charge.

$[Br^-]=[Ar]3d^(10)4s^24p^6$

In lithium bromide, one electron from lithium metal gets transferred to bromine atom.

(1) gains one electron and becomes a negatively charged ion
(2) gains three electrons and becomes a negatively charged ion
(3) loses one electron and becomes a positively charged ion
(4) loses three electrons and becomes a positively charged ion

on the basis of hybrid formation, explain the existence of compounds of column IVA such as CH4 when the elements of column IVA only have two unpaired electrons in normal state

Answers

CH4 compound is formed by sharing of electrons with hydrogen atom. They are bonded by ionic bonds. They undergo sp^3 hybridization.

Explanation:

The group 4A elements have 4 electrons in their valence shell or highest energy orbitals ie 2s^2, 2p^2

They share electrons from other elements thereby stabilising their valence shell and form bonds between them. The bonds can be covalent or ionic. It undergoes sp^3 hybridization.

The four valence electrons of the carbon atom are distributed equally in the hybrid orbitals, and each electron of carbon pairs with an electron of hydrogen atom when the C–H bonds form.

Everybody kept debating about is water wet so what you think?

Answers

Answer:it is not wet

Explanation: while many people believe it is, it is only our imagination of how our body think water would feel like.

Water is wet that is why you have to dry off after going swimming or after you wash your hands you have to dry them because they are wet. I don't understand how people think water is dry because water is a liquid and wet.

What skills and tools do scientists use?

Answers

Answer:

Scientist use the scientific method to test theories.

Explanation:

Final answer:

Scientists use a range of skills, primarily the scientific method, and tools, such as various lab equipment and technology, to conduct their research.

Explanation:

Scientists use a variety of skills and tools to conduct their research and investigations. The primary skill they possess is the scientific method, a systematic way of understanding the world around us, which involves observation, question formulation, hypothesis testing, data collection, data analysis and conclusion drawing.

As for tools, scientists use a range of laboratory equipment like microscopes and pipettes for biological research, telescopes for astronomical studies, spectrophotometers for chemical analysis, computers for data analysis, and more. Technology is greatly used in science as it aids in thorough and precise investigations.

Learn more about Scientific skills and tools here:

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3.00 moles of helium gas (He) are in a container with a volume is 2.00 liters and a temperature is at 298 K. What is the approximate pressure in kilopascals?