The classification of an instrument that makes sound from the substance itself is Idiophones.
What are instruments?Instruments are objects that are used in labs and music classes. They are the main items that help in doing work in those classes and labs. Instruments are made with technical knowledge and help in technical things.
The idiophone is an instrument that produces sound by vibrating the plates of the instrument. Under this, the instrument produces voices by themselves.
Thus, Idiophones are a type of instrument that produces sound using the substance itself.
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What molecules are found in all or almost all organic compounds?
a. Carbon and oxygen
b. Hydrogen and oxygen
C.
Carbon and nitrogen
d. Carbon and hydrogen
Please select the best answer from the choices provided
Ο Α
OB
O C
OD
What is the density of water at room temperature in g/ml? give just the number and not the unit.
The density of water at room temperature is 1.0 g/ml.
Density is defined as the mass per unit volume. It gives the denseness of a given substance in a specific space. Different substances have different densities.
The formula to calculate the density is:
ρ =m/v
where,
ρ is the density, m is the mass of the object and V is the volume of the object. The SI unit of density is kg/m³, but we use g/ml for our convenience.
For example, the density of water is 1000 kg/m3 but we convert it into 1.0 g/ml.
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3. Rutherford's gold foil experiment showed several new things abOut the structure of the atom. Which results support the claim that the atomn has a dense, positively charged core? Choose the two statements that apply. A. Some positive particles deflected at sharp angles. B. Some negative particles defiected at sharp angles. C. Most of the positive particles passed straight through the foil. D. Some positive particles bounced back in the direction they came from.
Answer:
D. Some positive particles bounced back in the direction they came from
When salt dissolves completely into water, which term is used to describe the water?
1. solute
2. solution
4. concentration
4. solvent
Water is called Solvent ,When salt dissolves completely into water.
What is solvent?Solvents are substances, usually liquids, that help other substances dissolve and mix together to form solutions. Nonpolar solvents, such as hydrocarbons, do not support ion production; polar solvents do (for example, water). Acidic, basic, amphoteric (both), or aprotic solvents are the four most common types (neither).
Alcohols, esters, ethers, ketones, amines, nitrated and halogenated hydrocarbons are a few examples of organic substances that are utilized as solvents, along with other hydrocarbons and aromatic compounds. Their main applications are in inks, paints, varnishes, lacquers, extractive processes, industrial cleansers, medicines, and media for chemical synthesis.
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Answer: solvent
Explanation:
1) how many grams are present in 29 kg?
2) how many millimeters are present in 2 meters ?
Answer:
1. there are 29,000 grams present in 29 kilograms
2. there are 2000 millimeters present in 2 meters.
check out this conversion table if you get stuck again! :)
An alloy contains 64 g of pure gold and 32 g of pure zinc. what is the percentage of zinc in the alloy?
The answer of the the percentage of zinc in the alloy is 33.33%.
Mass percent is the mass of the element or solute divided by the mass of the emulsion or solute. The result is multiplied by 100 to give a percent. The formula for the quantum of an element in a emulsion is mass percent = (mass of element in 1 operative of emulsion / mass of 1 operative of emulsion) *100.
An alloy, metallic substance comprised of two or more elements, as either a compound or a solution. For example: Brass is an alloy of two metals: copper and zinc.
According to question,
Mass of pure Gold = 64g
Mass of pure zinc = 32 g
Now,
Total weight of alloy is = 64 + 32 = 96 gram
32 g of which is zinc
So percentage (%) of zinc in the alloy is 32/96*100 = 33.33 %
Hence, the percentage of zinc in the alloy is 33.33%.
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The foreign substance responsible for causing an allergic reaction is called a(n):______.
The foreign substance responsible for causing an allergic reaction is called an allergen.
The exaggerated reaction of our body’s immune system to certain foreign substances is known as an allergy.
The symptoms of allergy are sneezing, watery eyes, running nose, and difficulty in breathing which occur due to the release of certain chemicals like histamine and serotonin in our body.
The foreign substance that causes allergy is called an allergen.
Common examples of the allergens are pollen grains of certain plants, animal dander, and food items like peanuts, mushrooms etc.
To control the symptoms of allergy, drugs like antihistamines and steroids are used.
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What is the total kinetic energy of all particles that make up the matter called?
The average kinetic energy of the particles in a substance is measured by its temperature. It is a typical particle's kinetic energy.
The thermal energy of an object is equal to the sum of the kinetic energies of all its constituent particles.
Thermal power
The sum of all an object's atoms and molecules' energies makes up the substance's total energy. Both the potential energy resulting from the forces between molecules and the kinetic energy of the particles resulting from the motions of molecules within the substance and of atoms within molecules make up thermal energy. The sum of the kinetic and potential energies is all that constitutes mechanical energy. Simply put, this amount is the total mechanical energy (abbreviated as TME).
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Process in which co2, is released as a by-product of oxidation-reduction reactions.
Process in which co2, is released as a by-product of oxidation-reduction reactions is known as krebs cycle.
In the mitochondrial matrix, acetyl-CoA is converted to carbon dioxide by the citric acid cycle, which also involves the reduction of coenzymes to produce ATP for the electron transport chain.
The acetyl group of acetyl-CoA is oxidized to make two molecules of CO2 in a succession of eight steps, while also producing one ATP. Additionally, reduced high-energy molecules like NADH and FADH2 are created.
Each glucose molecule produces two acetyl-CoA molecules so, the Krebs cycle must be completed twice to produce the four CO2, six NADH, two FADH2, and two ATPs.
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The ancestors of modern _________ performed the oxygenic photosynthesis responsible for converting our anoxic planet to an oxygenated one.
The ancestors of modern cyanobacteria performed the oxygenic photosynthesis responsible for converting our anoxic planet to an oxygenated one.
Photosynthesis sustains life on Earth today by releasing oxygen into the atmosphere and providing energy for the food chain. The rise of oxygen-producing photosynthesis enabled the evolution of complex life forms such as animals and land plants about 2.4 billion years ago. An example of photosynthesis is how plants grow by converting sugars and energy from water, air, and sunlight into energy. (biology) The process by which plants and other photoautotrophic plants produce carbohydrates and oxygen from carbon dioxide, water, and light energy.
Photosynthesis is important for plants to produce the glucose needed to manufacture energy and cellular structures. Photosynthesis also produces the oxygen that both plants and animals need for cellular respiration to make ATP, a complex organic chemical that provides energy.
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Which combinations of single and double bonds are possible around a carbon atom?
Two Single and One Double Covalent Bond are possible around a carbon atom. After the hydrogen, helium, and oxygen, carbon is the fourth most prevalent element in the universe by mass and the fifteenth most abundant element in the crust of the Earth.
Carbon can be considered a common component of all known life due to its abundance, distinctive diversity of organic compounds Bond and exceptional capacity to build polymers at Earth's typical temperatures. After oxygen, it makes up around 18.5% of the total mass of the human body. The allotropic form of carbon exhibits a wide range of physical properties.
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Jimmy runs fast, but he wants to run faster. He sees a commercial for a new type of sneaker that says they can make you run faster and jump higher because of how they are made. Jimmy goes and buys the new sneakers and then times how long it takes him to run one mile in his new sneakers. The next day, he puts his old sneakers back on and times how long it takes him to run one mile in his old sneakers. In his old sneakers he ran the mile in 8 minutes and 12 seconds. In his new sneakers he ran the mile in 7 minutes and 46 seconds. what is the hypothisis
Acids, bases, and salts belong to a large group of compounds called:__________
Answer:
electrolytes
Explanation:
Given what you know of the acid base chemistry of hf, what is the concentration of hf in an aqueous solution with a ph of 5.89?
Hydrofluoric acid, HF in an aqueous form having molecular weight of 20.01 have concentration of 48-50% w/w in aqueous solution/water with a pH of 5.89.
HF in an aqueous solution ionizes like the other acids. It is extremely corrosive. It dissociates in water as -
HF + H₂O ⇆ H₃O⁺ + F⁻
Hydrofluoric acid is much stronger when concentrated. If concentration increases and approach to 100%, the acidity of acid increases and the base forms a bond.
3HF ⇆ H₂F⁺ + HF₂⁻
The presence of hydrogen ion in an aqueous solution makes the HF acidic. HF is soluble with boiling point 19.5°C and melting point 0f -83.6°C
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Question 2 of 10
An 85.0 kg man playing hockey catches a puck moving at 25.0 m/s. The man
is initially at rest. The man and the puck move together after the collision. The
puck's mass is 0.16 kg. What is the final velocity?
A. 0.05 m/s
B. 13.6 m/s
C. 4.00 m/s
D. 1.00 m/s
SUBMIT
Explanation:
Using the law of the conservation of linear momentum P:
P_i = P_fP
i
=P
f
so:
M_mV_{mi}+M_pV_{pi} = M_sV_sM
m
V
mi
+M
p
V
pi
=M
s
V
s
where M_mM
m
is the mass of the man, V_{mi}V
mi
is the initial velocity of the man, M_pM
p
is the mass of the puck, V_{pi}V
pi
is the initial velocity of the puck, M_sM
s
is the mass of the puck and the man and V_sV
s
is the velocity of both after the collition.
Replacing values, we get:
(80kg)(0m/s)+(0.17kg)(20m/s) = (80kg + 0.17kg)V_s(80kg)(0m/s)+(0.17kg)(20m/s)=(80kg+0.17kg)V
s
Finally, solving for V_sV
s
:
V_sV
s
=0.0424m/s
Most elements are metals. What is a
physical property of metals?
A. They conduct heat.
B. They are man-made.
C. They float in water.
Answer:
A. They conduct heat.
Explanation:
Calculate the ratio (lb-mole o2 react/lb-mole no formed). if ammonia is fed to a continuous reactor at a rate of 100.0 kmol nh3/h, what oxygen feed rate (kmol/h) would correspond to 40.0xcess o2?
if ammonia is fed to a continuous reactor at a rate of 100.0 kmol nh3/h
175 Kmol/h is oxygen the fed rate that corresponds to 40% excess O₂.
Given chemical reaction is
4NH₃ + 5O₂ → 4NO + 6H₂O
The molecular weight of NH₃ is 17.03, O₂ is 32, NO is 30, and, H₂O is 18.
To find the ratio,
Ratio = lb-mole O₂ react / lb-mole NO formed
Or, ratio = 5/4
Or, ratio = 1.25
NH₃ fed rate = 100 Kmol/h
We have to find out whether the Oxygen fed rate corresponds to 40% excess O₂.
For each 4 Kmol of NH₃, 5 Kmol of O₂ is required.
4 Kmol of NH₃ ≡ 5 Kmol of O₂
100 Kmol of NH₃ ≡ 125 Kmol of O₂
So, 125 Kmol of O₂ is required for 100 Kmol of NH₃.
For 40% excess of O₂, the required Kmol is = 125 + 125 × 40%
The required Kmol of oxygen is 175 Kmol/h for excess of O₂.
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At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is:_______
At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is 1.100
Here at a pH of 7.25, the average Glu side chain is and protonated negatively charged so used henderson hasellbalch equation so ph=pka+log[A+]/[HA] the side chain carboxylic acid functional group of the glutamic acid molecule has a pKa of 4.1 and therefore exists almost entirely in its negatively charged deprotonated carboxylate form at pH values greater than 4.1; therefore, it is negatively charged at physiological pH ranging from 7.35 to 7.45
Glutamic side chain is 4.25
At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is 1.100
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Which has the greatest number of hydrogen atoms? group of answer choices 1020 hydrogen atoms 100 g of a substance that is 2% h by mass 100 g of water 20 g of hydrogen gas
20gm of hydrogen will have highest number of hydrogen atoms.
We know that 1 mole of substance contains atoms equal to Avogadro number i.e. [tex]6.022*10^{23}[/tex]
As molar mass of hydrogen is 1gm there 1 mole of hydrogen contains 1gm of hydrogen and [tex]6.022*10^{23}[/tex] hydrogen atoms
If we take 1020 hydrogen atoms then it is very less than [tex]6.022*10^{23}[/tex] hydrogen atoms.
In 100gm of substance if hydrogen is 2% by mass i.e. we have 2gm of hydrogen atom which means 2 mole of hydrogen atoms
Mass of 1 mole of water is 18gm
Thus 100 gm of water have 5.55 moles of water
In 1 mole of water we have 2 grams of hydrogen
Therefore 5.55 moles of water contains 11.11gm of water i.e. 11.11 mole of water
11.11gm of water = [tex]11.11* 6.022 * 10^{23}[/tex] atoms
In 20gm of hydrogen we have 20 mole of hydrogen
i.e. [tex]20* 6.022 * 10^{23}[/tex]
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Mobile water supply operations, such as water shuttles or relay pumping, must be performed:_____.
Mobile water supply operations, such as water shuttles or relay pumping, must be performed In rural areas without public water distribution systems
A distribution systems includes all of the centers and devices connecting a transmission device to the customer's device. A traditional distribution device can consist of: Substations. Distribution Feeder Circuits. Switches.
Distribution systems, additionally referred to as dispensed computing, is a device with more than one additive placed on extraordinary machines that speak and coordinate movements so that it will seem like an unmarried coherent device to the end-user.
A dispensed device is computing surrounding wherein diverse additives unfold throughout more than one computer (or different computing gadgets) on a network. These gadgets cut up the work, coordinating their efforts to finish the task extra effectively than if an unmarried tool were accountable for the task.
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What information does a topographical map primarily provide?
Answer:
A detailed map which shows every feature of the earth accurately including roads, airports, names of places etc is called a topographical map
Explanation:
what is another name for relative abudance?
Percent Composition
Mass
Weight
The another name for relative abundance is Percent Composition
So, option A is correct
The relative abundances of all the stable isotopes of an element always add up to 100% since relative abundances are typically reported as percentages. A weighted average of these numbers determines the average atomic mass of an element.
The fraction of an isotope that is present on earth is quantified as its percentage abundance. It provides the amount of that specific isotope. The fraction of an isotope species in relation to all other elements in nature is known as relative abundance.
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Which planet will have a diameter
that is approximately ten times
larger than Mercury on a scale
model?
O Mars
O Neptune
O Jupiter
O Venus
The planet that will have a diameter that is approximately ten times larger than Mercury on a scale model is Neptune (option B).
What is a scale model?A scale model is a three-dimensional copy or representation of something in which all parts have dimensions in the same proportion to that of the original.
In the solar system, there are nine planets. These nine planets in a decreasing order of their size (diameter) are as follows:
Jupiter - 142,800 KmSaturn - 120,660 KmUranus - 51,118 KmNeptune - 49,528 KmEarth - 12,756 KmVenus - 12,104 KmMars - 6,779 KmMercury - 4,849 KmBased on the original diameters of the planets, it can be said that the planet that will have a diameter that is approximately ten times larger than Mercury on a scale model is Neptune.
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Answer:
neptune
Explanation:
How many protons neutrons and electrons are there in a neutral atom of ^60co cobalt-60?
The protons neutrons and electrons are there in a neutral atom
In a neutral atom of ⁶⁰Co (cobalt-60), there are 27 protons, 27 electrons, and 33 neutrons.
We have to find the number of protons, neutrons, and electrons in a neutral atom of ⁶⁰Co (cobalt-60).
The number of protons = The atomic number.
The atomic number of cobalt is = 27
Therefore, the protons are 27
As protons and electrons are equal. Then, the number of electrons is 27.
The number of Neutrons = Atomic number - Number of protons.
Neutrons = 60 - 27
Or, neutrons = 33
Hence, the number of neutrons is 33, electrons are 27, and protons are 27 in a neutral (cobalt-60).
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The formulas for ethane, ethene, and ethyne are c2h6 , c2h4 , and c2h2 , respectively. Rank these compounds by the length of the carbonâ€"carbon bond.
The descending order of carbon-carbon bond length in C₂H₆, C₂H₄, and C₂H₂ is:-
C₂H₆, C₂H₄, C₂H₂
Hydrocarbons are compounds that consist of only hydrogen and carbon.
On the basis of the presence or absence of double bonds/triple bonds, they are of three types- alkanes, alkenes, and alkynes.
Alkanes do not contain any double bonds.Alkenes contain one or more double bond(s) between the carbon atoms.Alkenes contain one or more triple bond(s) between carbon atoms.The comparison between alkanes, alkenes, and alkynes is given in the adjoining image.
We can see that the bond length in alkanes like C₂H₆ is 1.53 A which is greater than alkenes(C₂H₄) , 1.33 A which is still greater than alkynes(C₂H₂) with a value of 1.18 A.
Thus, The descending order of carbon-carbon bond length in C₂H₆, C₂H₄, and C₂H₂ is:
C₂H₆, C₂H₄, C₂H₂
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Have you ever tried eating delicious delicacies served in your school canteen during recess time? Have you ever thought of how these foods were prepared in such a way that various ingredients were mixed to make it delicious and healthy? The combination of several components or elements produce a useful end product that can be utilized and consumed for our advantage.
Yes, I have tried eating delicious delicacies served in the school canteen during recess time.
The food that is served in the school canteen is either cooked or in raw form.For example, I ate a vegetable sandwich and a banana smoothie for lunch. Cucumber and tomato are the sandwich's ingredients. We had bread, butter, salt, cheese, and cabbage. Bananas, milk, and sugar are all components of the banana milkshake. the cucumber has vitamin C. While tomatoes also contain vitamin C, cheese has lipids, and Banana has carbohydrates and these all components are good for health.Energy is what carbs are mostly used for, but they also aid to control blood sugar levels. While proteins are the building blocks of the body, stable lipids primarily aid in the storage of energy and the communication of information to cell membranes.The combination of these components in food produces different end products like vitamins, minerals, and many other nutrients which are beneficial for a healthy body.
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An isotope of cesium (cesium-137) has a half-life of 30 years. if 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain?
0.125 mg of cesium-137 would remain.
What is cesium-137?For calibrating radiation-detection tools like Geiger-Mueller counters, modest amounts of cs-137 are utilized. Cs-137 is employed in higher concentrations in medical radiation therapy equipment for the treatment of cancer, in industrial gauges that monitor liquid flow through pipelines, and in other industrial equipment to gauge the thickness of materials including paper, photographic film, and metal sheets.
In nuclear reactors and during the testing of nuclear weapons, one of the consequences of nuclear fission is cs-137. Due to nuclear reactor mishaps, such as the 1986 Chernobyl power plant accident, which spread Cs-137 to numerous European nations, and nuclear weapons testing that took place in the 1950s and 1960s, small amounts of Cs-137 can be discovered in the environment.
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A chemical reaction in which bonds are created is usually associated with ________.
A chemical reaction in which bonds are created is usually associated with The consumption of energy
Consumption method using, shopping for, or consuming something. If we do not lessen our power intake, we are able to run out of fuel. Conspicuous intake is shopping for something to expose off. Consumption is associated with the verb consume, which means to eat, use, or buy.
There are four Consumption kinds of client goods. They are comfort goods, distinctiveness goods, purchasing goods, and unsought goods.
Consumption of Food intake is a periodic behavior. It is brought on at diverse moments of the day through some converging factors (time of day, want a state, sensory stimulation, social context, etc.).
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Which 1 m solution would have the highest vapor pressure at a given temperature?
c6h12o6 kcl nac2h3o2 li2so4
The 1 m solutions of C6H1O6 have the highest vapor pressure at a given temperature.
Vapor pressure is defined as the tendency of a liquid to convert into a vapor state. The vapor pressure depends on temperature, surface area, intermolecular forces, and the number of moles of a substance.
The higher the number of moles of particles in solute, the lower the vapor pressure and vice versa.
C6H12O6 has the highest vapor pressure among the given options because it has the lowest number of moles or particles in the solute. The remaining options have more moles of particles in the solute.
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You want to know how much total energy is required to operate a 100-watt light bulb. do you need any more information?
Yes; you need to know how long the light bulb is on.
How much electricity does a light bulb use?Because of this, lower wattage bulbs are sometimes referred to as "equivalent to 60W"; nevertheless, what is equal is brightness, not energy consumption.
Converting wattage to kilowatts is the best way to determine how much energy your lightbulb consumes. Thus, 0.1 kW would be needed per hour for a 100W light bulb.
Incandescent (up to 100W) and halogen (up to 120W) light bulbs with higher energy consumption are being phased out. You may get ornamental exposed carbon filament light bulbs, which are normally 40–60W, if you still have any of them operating in your house.
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