Which is more viscous - petrol or diesel?

Answer:

C. is the correct answer

Explanation:

I just completed this question and got it correct.

Answer:

D. an orbital notation of the atom

Explanation:

i took the test

Answer:

600 years ago

Explanation:

it was first recorded by England's Sir Francis Bacon (1561-1626)

Answer:

C. Carbon dioxide. (C02.)

Explanation:

Hope this helps. :)

Answer:

Carbon dioxide

Explanation:

Answer:

B. Amount of snot the tissue can hold

Explanation:

In this specific scenario, the dependent variable would be the amount of snot the tissue can hold. That is because this is what Justin is trying to measure, which is also dependent on the type of tissue which would be the independent variable in this scenario. The different types of tissues can absorb different amounts of snot and this is what Justin ultimately wants to determine.

Answer:

Oxides of Nitrogen (NOx)

NOx is a collective term used to refer to two species of oxides of nitrogen: nitric oxide (NO) and nitrogen dioxide (NO2).

Annual mean concentrations of NO2 in urban areas are generally in the range 10-45 ppb (20-90 µgm-3). Levels vary significantly throughout the day, with peaks generally occurring twice daily as a consequence of "rush hour" traffic. Maximum daily and one hourly means can be as high as 200 ppb (400 µgm-3) and 600 ppb (1200 µgm-3) respectively.

Globally, quantities of nitrogen oxides produced naturally (by bacterial and volcanic action and lightning) far outweigh anthropogenic (man-made) emissions. Anthropogenic emissions are mainly due to fossil fuel combustion from both stationary sources, i.e. power generation (21%), and mobile sources, i.e. transport (44%). Other atmospheric contributions come from non-combustion processes, for example nitric acid manufacture, welding processes and the use of explosives.

Sulphur Dioxide (SO2)

SO2 is a colourless gas. It reacts on the surface of a variety of airborne solid particles, is soluble in water and can be oxidised within airborne water droplets.

Annual mean concentrations in most major UK cities are now well below 35 ppb (100 µgm-3) with typical mean values in the range of 5-20 ppb (15-50 µgm-3). Hourly peak values can be 400-750 ppb (1000-2000 µgm-3) on infrequent occasions. Natural background levels are about 2 ppb (5 µgm-3).

The most important sources of SO2 are fossil fuel combustion, smelting, manufacture of sulphuric acid, conversion of wood pulp to paper, incineration of refuse and production of elemental sulphur. Coal burning is the single largest man-made source of SO2 accounting for about 50% of annual global emissions, with oil burning accounting for a further 25-30%.

Carbon Monoxide (CO)

Carbon Monoxide is a colourless, odourless, tasteless gas that is slightly lighter than air.

Natural background levels of CO fall in the range of 10-200 ppb. Levels in urban areas are highly variable, depending upon weather conditions and traffic density. 8-hour mean values are generally less than 10 ppm (12 mgm-3) but have been known to be as high as 500 ppm (600 mgm-3).

CO is an intermediate product through which all carbon species must pass when combusted in oxygen (O2). In the presence of an adequate supply of O2 most CO produced during combustion is immediately oxidised to carbon dioxide (CO2). However, this is not the case in spark ignition engines, especially under idling and deceleration conditions. Thus, the major source of atmospheric CO is the spark ignition combustion engine. Smaller contributions come from processes involving the combustion of organic matter, for example in power stations and waste incineration.

Ozone (O3)

O3 is the tri-atomic form of molecular oxygen. It is a strong oxidising agent, and hence highly reactive.

Background levels of O3 in Europe are usually less than 15 ppb but can be as 100 ppb during summer time photochemical smog episodes. In the UK ozone occurs in higher concentrations during summer than winter, in the south rather than the north and in rural rather than urban areas.

Most O3 in the troposphere (lower atmosphere) is formed indirectly by the action of sunlight on nitrogen dioxide - there are no direct emissions of O3 to the atmosphere. About 10 - 15% of tropospheric O3 is transported from the stratosphere where it is formed by the action of ultraviolet (UV) radiation on O2. In addition to O3, photochemical reactions involving sunlight produce a number of oxidants including peroxyacetyl nitrate (PAN), nitric acid and hydrogen peroxide, as well as secondary aldehydes, formic acid, fine particulates and an array of short lived radicals. As a result of the various reactions that take place, O3 tends to build up downwind of urban centres where most of NOx is emitted from vehicles.

Explanation:

Explanation:

its its originality as an atom has to be pure

A different element is formed because the radioactive element has lost its originality as a pure atom when a radioactive element emits alpha radiation.

Some elements of unstable atomic nuclei undergo radioactive decay to form stable nuclei because of the presence of excess nuclear charge inside them are known as radioactive elements.

The stability of nuclei of an element can be estimated by neutron to proton ratio. The atomic number up to Z= 20 is stable nuclei and contains an equal number of protons and neutrons. As the atomic number starts to increase, the repulsion forces between protons increase.

Thus, the neutron-to-proton ratios of stable nuclei increase with increasing atomic numbers. If elements with the atomic number, Z > 83 and n/p > 1.5 and they will be most unstable and radioactive.

For example, Pu-240 emits an alpha particle and gets converted into U-236 which is completely different from the original nuclei.

²⁴⁰Pu₉₄  →   ⁴He₂  +   ²³⁶U₉₂

Therefore, the radioactive element lost its identity after disintegration.

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Answer:

1.346 g/mL

Explanation:

The density is defined as the mass of a substance per unit of volume.

In the problem, you add 10.0mL of glycerine. the mass change from 78.32g to 91.78g. The difference is the mass of the glycerine:

Mass glycerine: 91.78g - 78.32g = 13.46g

As the volume added was 10.0mL, the density, δ, in g/mL is:

δ =13.46g / 10.0mL =

Answer:

Variable is a changebale factor in an experiment.

Explanation:

Answer: O VARIABLE

Explanation:

Answer:

Air

Explanation:

Air is an homogeneous mixture because it contain gaseous samples that have the same proportion throughout it's given sample. Air is a mixture of gaseous substances of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, 1% of water vapor and small amounts of other gases in same proportion.

Answer:

There are 5 neutrons in beryllium

Here it is⬆️ Distance is 125 km

Answer:

Explanation:

Na2CO3(ag) +2k(s) →K2CO3 (aq) + 2Na(s)

Answer:

The frequencies of light that an atom can emit are dependent on states the electrons can be in. When excited, an electron moves to a higher energy level or orbital. When the electron falls back to its ground level the light is emitted.

Answer:

9.67 g

Explanation:

176 cm³ / 18.2 g/cm³ = 9.6703296703...

I rounded to the nearest hundredth

Answer:

(a): 2,300 kilograms

(b): 0.005 kilograms

(c): 2.3 × 10^-5 kilograms

(d): 155 kilograms

Explanation:

Formulas:

(a); divide the mass value by 1000

(b); divide the mass value by 1e+6

(c); divide the mass value by 1e+9

(d); multiply the mass value by 1000

Answer:

independent variable- instrumental music

dependent variable- Number of stacks of papers made

experimental variable- Group A has instrumental music

playing

constant- same task,

Explanation:

Answer:

Na

Sodium is located in the third row of the periodic table, where the 3s3s3, s orbital is being filled. Because sodium is the first of the two 3s3s3, s elements, its ground-state electron configuration contains a single, unpaired 3s3s3, s electron.

Explanation:

its late but ik someone can use it

The ground-state electron configuration for an element contains an unpaired 3s electron is Sodium, Na.

The ground state electron configuration of an element shows a series of how its electrons are arranged in thier orbitals at their  lowest energy state.

The element which contained an unpaired 3s electron is the Alkali metal, Sodium.

Sodium, Na has atomic number of 11 and at ground state and will therefore be written as  1s²2s²2p⁶3s¹   We can also write the condensed form since the core electrons is the same with Ne,  a noble gas which is [Ne]3s1.

The s orbital should contain at most 2 electrons , since for sodium, it has 1 electron in the 3s orbital, we say it is unpaired.

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The answer would be: Making fluorescent light for houses.

Making fluorescent lights for houses can be categorized as use of plasma in technology.

Plasma technology is commonly used in many industries, including in the automotive, microelectronics, packaging and medical device industries. Along with solid, liquid and gas, plasma is a state of matter.

State changes occur by either adding or removing energy from a substance.

Making fluorescent lights for houses can be categorized as use of plasma in technology

The mercury atoms in the plasma generate light very efficiently, but much of it is ultra-violet (UV), invisible to the eye and harmful to it (or rather, it would be, were it not absorbed by the glass).

The solution is to coat the inside of the tube with a glow-in-the-dark (fluorescent) paint, which absorbs the UV and re-emits its energy as visible light.

Therefore Option C is the correct answer.

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Answer:

Pure Silicon in Electronics

Silicon material is commonly used as a semiconductor in electronics: devices such as transistors, printed circuit boards, and integrated circuits make use of silicon's highly conductive properties to maximize their performance.

Explanation:

Answer:

Analytical chemistry

Explanation:

because in analytical chemistry checks that different chemicals in water,salt etc....

Answer:

Radiation

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible.

Answer: The scientist is observing an intensive property of a superconductor. ( So C)

Explanation: edu

Answer: the scientist is observing an intensive property of a superconductor.

Answer:

Yes

Explanation:

Is this a question or what?

Answer:

this is true and should always be true

Explanation:

if they are not on in the lab you or others may get injured

Answer:

4219500 centimeters

Explanation:

I hope this helped!

Answer:

C) The boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday.

Explanation:

The sentence that has been in the parallel structure has been the boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday has been in parallel structure. Thus, option C is correct.

The parallel structure can be defined as the continuous repetition of the grammatical form in the sentence. The parallel structure has been able to provide equal importance to the tasks in the sentence.

In the given sentence, the varying task has been late shifts, open tomorrow, and work on holidays. The grammatical form of who can has been able to give equal importance to every task with the repetition.

Thus, boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday has been in parallel structure. Thus, option C is correct.

For more information about the parallel structure, refer to the link:

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Note that all detail explanation on why or how will be attached at the end

Step 1: Removing the Oil

Theoretically, step 1 and 2 can be alternated and preferably I would start with step 2, but I thought of one first. I would begin by setting up the liquid mixture in a funnel with a closed twist valve. Once the water mixture and oil has separated, I would slowly remove all the water, leaving the oil.

Step 2: Removing the Gravel and Sand

The second step is to filter out solids by using a sand filter. This filter is made by using a Styrofoam cup that has had small holes punched into the bottom with an open paperclip. The cup is filled with layers of clean washed gravel. The gravel will be layered by putting course gravel in the bottom and fine sand in the middle followed by course sand on the top. The gravel on the bottom stops the loss of sand out of the holes and the gravel on top stops the sand from washing out as a sample is poured.

Step 3: Removing the Coffee Grounds and Garlic Powder

You would start by lining a clean funnel with a coffee filter or something comparable. Then, you would add a spoonful or so of Charcoal to the funnel. Then you would pour the mixture of water, garlic powder, salt and coffee grounds into it.

Step 4: Removing Salt

You would preform a simple evaporation to remove the salt from the water. If the water is still needed, then you can preform a sealed distillation which has the same effect, but just keeps the water.

Step 5: Celebrate!

If you are doing this is a school, congratulations! you just finished your assignment/lab! If you are doing this in the wilderness for survival, congratulations! you won't die so soon!*

*The purification of water will not guarantee your extended survival in the wilderness, just extend the time in which you will not die of dehydration.™

Explanation:

Step 1 works because the density of oil and water are different, so as you let the liquid settle, the two liquids will separate into two sections. This allows you to funnel the water out. Step 2 work because the gravel and sand you want out cannot pass the sand-gravel filter you made (as long as it was made correctly) Step 3 works because the garlic powder and coffee grounds cannot pass the filter and the smell and colour that leaked into the water would be removed by the charcoal. Step 4 works because as water evaporates or is boiled off, the salt cannot evaporate with it, so it is left behind. Like how I was in the mall. Step 5 works because this was a long explanation and now you can go look at memes.

Answer:

I feel it would be C or D but more likely to be D

Explanation:

Answer:

I guess it is A he talks to u alot but boys are different so it could be each one u know?