Can someone help please

Answer:

It is natural energy coming from nature . Natural energy can be made without the help of humans.

Explanation:

Answer:

0.638 moles in 63.8g of calcium carbonate

Explanation:

Answer:

Sound (I think)

Explanation:

Amplitude is the maximum displacement of the sound particle from its original place. An increase in amplitude increases the energy of the wave.

Amplitude is the distance from the rest of the wave to the crest of the wave. It is the maximum distance covered by the vibrating body.

The amplitude length increases with an increase in the vibration of the sound particles. This leads to an increase in the intensity and the energy of the particle of the sound particles. The increased energy increases the loudness of the sound.

Therefore, the increased amplitude results in increased energy.

Learn more about amplitude here:

https://brainly.com/question/15191027

GGCCATAGGTCCCTTTAGCG

I believe this is correct (I used the complementary base)

Answer:

this is because aluminium is a non renewable source of material. the process to mine it is expensive. the process releases greenhouse gases which are harmful to the environment. it takes a long time to extract the aluminium. it is a way to help reduce waste products.

( this answer will only get you about 5 marks you need one more point in your answer. I just couldn't be bothered to think about another one.)

Answer:

Experimental investigation of heat transfer during pool boiling of two nanofluids, i.e., water-Al2O3 and water-Cu has been carried out. Nanoparticles were tested at the concentration of 0.01%, 0.1%, and 1% by weight. The horizontal smooth copper and stainless steel tubes having 10 mm OD and 0.6 mm wall thickness formed test heater. The experiments have been performed to establish the influence of nanofluids concentration as well as tube surface material on heat transfer characteristics at atmospheric pressure. The results indicate that independent of concentration nanoparticle material (Al2O3 and Cu) has almost no influence on heat transfer coefficient while boiling of water-Al2O3 or water-Cu nanofluids on smooth copper tube. It seems that heater material did not affect the boiling heat transfer in 0.1 wt.% water-Cu nanofluid, nevertheless independent of concentration, distinctly higher heat transfer coefficient was recorded for stainless steel tube than for copper tube for the same heat flux density.

Introduction

Recent advances in nanotechnology have allowed development of a new category of liquids termed nanofluids, which was first used by a group in Argonne National Laboratory USA [1] to describe liquid suspensions containing nanoparticles with thermal conductivities, orders of magnitudes higher than the base liquids, and with sizes significantly smaller than 100 nm. The augment of thermal conductivity could provide a basis for an enormous innovation for heat transfer intensification, which is pertinent to a number of industrial sectors including transportation, power generation, micro-manufacturing, chemical and metallurgical industries, as well as heating, cooling, ventilation, and air-conditioning industry. Literature findings regarding pool boiling of nanofluids can be summarized as follows.

Li et al. [2] studied boiling of water-CuO nanofluids of different concentrations (0.05% and 0.2% by weight) on copper plate. They observed deterioration of heat transfer as compared to the base fluid and attributed this fact to the sedimentation of nanoparticles which leads to the changing of radius of cavity, contact angle, and superheat layer thickness.

You et al. [3] reported that independent of the concentration of the nanoparticles (0.001 to 0.05 g/l) nucleate boiling heat transfer coefficients for water-Al2O3 nanofluid while boiling on plate appeared to be the same as for base fluid. They also found that the size of bubbles increased with addition of nanoparticles to water.

Das et al. [4] conducted an investigation on the pool boiling of water-Al2O3 nanofluids on a horizontal tubular heater having a diameter of 20 mm with different surface roughness at atmospheric pressure. It was found that the boiling heat transfer of nanoparticle-suspensions was deteriorated compared to that of pure water. Compared with pure water, surface roughness of the heating surface could also greatly affect the nucleation superheat. The subsidence of nanoparticles was considered as the main reason for the increase of the superheat.

Vassallo et al. [5] carried out an experiment of water-SiO2 nanofluids boiling on a horizontal NiCr wire at atmospheric pressure. No appreciable differences in the boiling heat transfer were found for the heat flux less than the CHF.

Bang and Chang [6] conducted an experimental investigation on the pool boiling of water-Al2O3 nanofluids on a plain plate at atmospheric pressure. The concentration of nanoparticles was

Answer:

D. Metallic Solid

Explanation:

A P E X:L E A R N I N G

Answer:62684

Explanation:

Answer: The Ed- you swirl chair could not produce energy to power the school electronics.

Explanation:

The data obtained from the electric company demonstrates that the school uses the 15 million joules of energy per hour. The energy produced by the chair will not provide the enough labor that the school uses. This was proved by the engineers product testing lab, Inc.. They proved that the chair could harness 4,000 joules of energy in a day for use. It takes 20 days to the chair to charge one tablet which is time consuming and labor done by the chair will get compromised. This shows that the chair will be cover even of fraction of energy required for school use to charge the small electronics.

Mass of KNO₃ : = 40.643 g

Given

28.5 g of K₃PO₄

Required

Mass of KNO₃

Solution

Reaction(Balanced equation) :

2K₃PO₄ + 3 Ca(NO₃)₂ = Ca₃(PO₄)₂ + 6 KNO₃

mol K₃PO₄(MW=212,27 g/mol) :

= mass : MW

= 28.5 : 212,27 g/mol

= 0.134

Mol ratio of K₃PO₄ : KNO₃ = 2 : 6, so mol KNO₃ :

= 6/2 x mol K₃PO₄

= 6/2 x 0.134

= 0.402

Mass of KNO₃ :

= mol x MW KNO₃

= 0.402 x 101,1032 g/mol

= 40.643 g

4 mol O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[RxN - Balanced]   CH₄ + 2O₂ → CO₂ + 2H₂O

[Given]   4 mol H₂O

[Solve]   x mol O₂

Step 2: Identify Conversions

[RxN] 2 mol H₂O → 2 mol O₂

Step 3: Stoichiometry

Moles of O₂= 4

Given

Reaction

CH₄ + 20₂ → CO₂ + 2H₂O

4 moles of H₂O

Required

Moles of O₂

Solution

In a chemical equation, the reaction coefficient shows the mole ratio of the compounds involved in the reaction, reactants or products

From the equation, mol ratio of H₂O  : O₂ = 2 : 2, so moles O₂ :

= 2/2 x moles H₂O

= 2/2 x 24

= 4 moles

2SnO2 + 2H2---->2Sn + H2o

Answer:

Fe + CuSO4 →  Cu + Fe2(SO4)

2. Combine lead (II) nitrate and potassium iodide solutions.

Pb(NO3)2+ Kl →  KNO3 + PbI2

3. Combine magnesium metal and hydrochloric acid solution.

Mg + HCl →  MgCl 2(aq) + H 2(g)

4. Electrolysis (splitting) of water.

H2O →  Im not sure sorry

5. Burning magnesium.

Mg + O2 → MgO

Explanation:

Answer:

a condensation

Explanation:

the water gets to a boiling point it gets so hot to the point where it rises up in the air when it gets cold it goes down basically

Answer:

the answer is boiling, hope it helps

Answer:

house fly = cellular    rabbit = cellular    crab = cellular

Explanation:

Answer:

bdnsndmzmkrrbby

Explanation:

hfjdkxkx dnamkynskfkfnd

Answer:

The rising global temperature is causing Arctic warming, which may be triggering summer heat waves in some areas of the world. The author wrote the article to show another possible effect of climate change, even though the mechanism behind these heat waves is not completely understood yet.

Explanation:

plato sample answer

Answer:

EZ

in my knowledge

Option C Nazca

i think the second one " Gold Has a High Conductivity " but i'm sure its not the last one or the first one. Golds conductivity is higher than copper but that doesn't mean coppers is very low.

The statement that correctly describes the conductivity of the specified material is: Gold has a high conductivity. Therefore, option B is correct.

The conductivity of any material refers to the ability of the material to conduct electricity. Gold is an excellent conductor of electricity, with a high electrical conductivity value of approximately 44.2 million siemens per meter (MS/m) at room temperature. This high electrical conductivity makes gold useful in many electronic applications, such as wiring, connectors, and circuit boards.

Copper is another metal that has high electrical conductivity and is commonly used in electrical wiring due to its excellent conductivity. Most wires are made to have high conductivity.

On the other hand, most plastics have low electrical conductivity and are often used as insulators to prevent electricity from flowing through them. Hence, option B is correct.

Learn more about conductivity, here:

https://brainly.com/question/21496559

#SPJ3

Answer:

1.392 X 106 in satndard form is 147.552. In scientific Notation, it is 1.47552 X 10²

Explanation:

To put it in standard form you multiply 1.392 by 106.

To put it in scientific notation you move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

CH4 is not soluble in water

whereas CH3OH is soluble in water.

Answer:

CH4 is non polar covalent compound and non polar covalent compounds are insoluble in polar covalent compounds like water.

And CH3OH is soluble in water because it polar and also due to hydrogen bonding.

Answer:

C2H7N

Explanation:

Answer:

because in bellon when we pump he throw carbon dioxide not hydrogen

Answer:

Because helium is lighter than air, a helium balloon rises. Hydrogen is another gas lighter than air; it is even lighter than helium.

Explanation:

Hydrogen is not used in balloons and this demonstration shows why. ... This is because hydrogen burns very easily.

Answer:

true

Explanation:

Answer:

is matter

Explanation:

Answer:

The first one.

Explanation: