The sound was repeated because of the phenomenon of echo. The speed of sound in the metal is 800 m/s.
Echo results from the reflection of sound waves. The reason why a sound may be heard twice owes to the phenomenon of reflection which leads to echo.
To determine the speed of sound in the metal;
Length of metal = 1000 m
Time taken between the two sounds = 2.5 s
Using the formula;
V = 2d/t
V = 2(1000)/2.5
V = 800 m/s
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How are heterogeneous mixtures and solutions the same?How are they different?
Hello soysans!
Heterogeneous mixtures and solutions are, well....mixtures.
Solutions are a type of homogeneous mixtures.
Now, what are homogeneous mixtures? Homogeneous mixtures are mixtures that are uniformly spread throughout. They have an even distribution of components. The particles are soluble & too fine to be seen be seen by the naked eye.
On the other hand, heterogeneous mixtures are mixtures that are non-uniformly spread throughout. They have an unequal composition & the particles are big enough to be seen by the naked eye.
Solutions (homogeneous mixtures) & heterogeneous mixtures have a lot of similarities & dissimilarities between them.
Similarities (How are heterogeneous mixtures and solutions the same?) :
Homogeneous mixtures & heterogeneous mixtures are mixtures, i.e, they are made up of 2 or more particles/components mixed together.Dissimilarities (How are they different?) :
Heterogeneous mixtures are non-uniformly scattered while homogeneous mixtures are uniformly scattered.Heterogeneous mixtures have huge particles while particles in homogeneous mixtures are very small.Heterogeneous mixtures can scatter light (tyndall effect) but homogeneous mixtures cannot.___________________
[tex]\mathfrak{Lucazz}[/tex]
1. What are five examples of observable properties?
Answer:
Color
Size
Texture
Shape
Odor
Hardness
Physical state of matter (whether it is a liquid, solid, or gas)
Explanation:
go ogle
Determine the average velocity of one person
Answer:
The average velocity calculator uses the formula that shows the average velocity (v) equals the sum of the final velocity (v) and the initial velocity (u), divided by 2.
Explanation:
Find the volume of 5.74 grams of NO2 (Hint: use two factors)
Answer:
1.2 cm^3
Explanation:
5.74 grams of a something occupies a volume of 1.2 cm^3 .
Describe the main energy level shape and of the 2p * orbital
Answer:
The letters, s, p, d, and f designate the shape of the orbital. (The shape is a consequence of the magnitude of the electron's angular momentum, resulting from its angular motion.) An s orbital is spherical with its centre at the nucleus.
The sample contains 1. 02 mol S. To calculate the mole ratios of the elements, you will divide each molar amount by 1. 02 mol. Calculate the mole ratios of the elements in the compound. Round each ratio to the nearest whole number. Mole ratio of H:S = mole ratio of S:S = mole ratio of O:S =.
high
incomplete
low
metal
nonmetal
nonmetals
oppositely
share
solids
Atoms will combine with each in order to become more chemically stable. Compounds are formed between two atoms that have
drag and drop answer here outer energy levels. The two types of compounds that can be formed between atoms are ionic and covalent.
Ionic compounds are formed between two drag and drop answer here charged atoms. Ionic compounds contain a drag and drop answer here ion and a
drag and drop answer here ion. Metals will lose electrons to form positive ions and nonmetals will gain electrons to form negative ions. These
oppositely charge ions are very attracted to each other and form very strong bonds as a result. Ionic compounds are characterized by crystalline
structure, drag and drop answer here melting and boiling points, and are drag and drop answer here at room temperature.
Two drag and drop answer here will combine to form covalent compounds. Covalent compounds are formed when two atoms drag and drop answer here
one or more pairs of electrons. The force of attraction between the nonmetals is relatively weak. Covalent compounds are characterized by
drag and drop answer here melting and boiling points and can be gases, liquids, or soft solids at room temperature.
Chemical and Physical Properties
Answer:
Chemical bonds are forces that hold atoms together to make compounds or molecules. ... This type of bond forms most frequently between two non- metals
Explanation:
I need help. How do you solve this ?
Answer:
it's number four 122.36
Explanation:
54.87% of 223 is 122.36
PLEASE HELP!!!! DUE SOON!!
Use the portion of the periodic table shown below to answer the questions.
A portion of the first three columns of the periodic table is shown. Column one from top to bottom reads 11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. Column two reads 12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. Column three reads 21 scandium 44.956 and 39 yttrium 88.906.
Part 1: Name two elements that have the same properties as magnesium (Mg). (4 points)
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences. (6 points)
Answer:
Explanation:
Calcium and Beryllium are similar to Magnesium because all the three elements belong to the same group and have 2 valence electrons in their outer shell.
Potassium has 19 protons and - since the number of protons is the same as the number of electrons- also 19 electrons. To find out the number of neutrons you have to look at the atomic mass or weight of the element.
In a double-replacement reaction, the
Answer: just want points
Explanation: POINTS!! ;)
what waves can pass through a bell jar?
Answer:heat waves
Explanation:
Distinguish between efficiency and mechanical advantage.
Answer:
I think the answer is Mechanical advantage is a measure of how much your force is multipled efficiency is measure of how much of the work you do actually goes to moving the thing you are trying to move.
Adding more pulleys may increase the mechanical advantage but, it also increases the amount of extra stuff you are moving.
if it help you please mark me as a Brainlist.
calculate the moles and Molecules presents in ammonia present in 5.6dm3
of its volume STP?
Answer: 0.25 moles NH3
1.51x10^23 molecules NH3
Explanation:
5.6dm3 (cubic decimeters)
1 dm^3 = 1 liter
We have 5.6L of ammonia (NH3 gas) at STP. All gases at STP occupy 22.4 liters/mole. Use this information as a conversion factor:
(22.4 L NH3)/(mole NH3)
Therefore:
(5.6L NH3)/(22.4 L NH3)/(mole NH3) = 0.25 moles NH3
Use Avogadro's number to convert moles to particles/molecules
(0.25 moles NH3)*(6.02x10^23 molecules/mole) = 1.51x10^23 molecules NH3
Suppose you wish to jump horizontally and in order for you to jump a distance of 4 feet horizontally, you must exert a force of 200 N. When you are standing on the ground, you have no trouble jumping 4 feet horizontally. If you are standing in a canoe, however, and you need to jump 4 feet to reach the pier, you will surely fall into the lake. Why is it that you cannot jump 4 feet out of a canoe when you can easily do this when on land?
Answer: because it is
Explanation: to be honest is just is there is not explanation needed
What is the importance of water?
IMPORTANCE:
Water is very important. Whether it's from washing your dishes to hydrating, to simply just watering your flowers, water is important.
Washing Dishes
When you eat, after you eat, you wanna clean your dish. You're not gonna keep it dirty, you're going to have to wash it. Soap and water are often used when washing dishes. It's the best way to get it cleaned.
Hydration
Drinking water can have many benefits. It can make you more productive, you can even lose weight, no migraines, and it can boost your metabolism.
Watering Flowers
It's helpful to water plants because watering them on a basis/routine can help them gain nutrients. No watering the plant can result the plant drooping down and for it to become droopy and dry.
why the Titanic sunk due to density.
Answer:
When the titanic hit the iceberg, water rushed into the ships hull and displaced the air. The average density of the water and the steel ship was greater than the density of the water. The result of this caused the titanic to sink to the bottom of the Atlantic.
Which action occurs at an electrode of a galvanic cell?(1 point)
a) anion flow
b) anion transfer
c) electron flow
d) electron transfer
Answer:
Electron Transfer OR Electron Flow.
Explanation:
I'm not 100 percent im sorry
Electron transfer occurs at an electrode of a galvanic cell
A Galvanic cell converts chemical energy into electrical energy.
There are two electrodes in a galvanic cell which are anode and cathode. The electrodes is where electron transfer occurs.
The anode is the electrode at which the oxidation (loss of electron) occurs whereas the cathode is the electrode at which the reduction (gain of electrons) occurs.
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why did bohr revise rutherford's model of the atom
Answer:
Bohr Atomic Model : In 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus. ... To remedy the stability problem, Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy.
A solid object with the density of 2.8 g/mL is placed in water. What will most likely happen?
(a) It will dissolve.
(b) It will float.
(c) It will sink.
(d) It will melt.
Thanks!
Answer:
When a solid with the density of 2.8 g/mL is placed in water, it will sink.
Hurry for A brainlist
Answer:
Option C .P=79, N= 118 Atomic number=79 Mass number=197
A rod made up of a single element is used to heat water using electricity. To which group does this element probably belong to?
A. Group 2
B. Group 17
C. Group 1
D. Group 3-12
Answer:d
Explanation:
answer is d for plato users
Which of earth's spheres consists of all living things?
"lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air)
A 7.45 L container holds a mixture of two gases at 15 °C. The partial pressures of gas A and gas B, respectively, are 0.364 atm and 0.684 atm. If 0.150 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?
Answer:
stored and active
Explanation:
both cannot be thransformed into another type of energy
does cream cheese frosting have to be refrigerated?
Answer:
Yes its true because cream cheese has to be refrigerated it will spoil it just depends on how long its out.
Explanation:
PLEASE HELP ME ASAAAAPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!
Balance the chemical equation using the algebraic method.
C4H10+O2=CO2+H2O
SHOW YOUR WORK PLEASEEEEEEEEE
a. What is the oxidation state of an element? (1 point)
Answer:
he total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom.
Explanation:
plssssssssssssss like and brainiest
What is glacial acetic acid? What function does it have?
Answer:
Acetic acid, systematically named ethanoic acid, is an acidic, colourless liquid and organic compound with the chemical formula CH₃COOH. Diluted, glacial acetic acid is used in preservation and canning of pickles and other vegetables. It is also used as a descaling agent for cleaning.
Explanation:
Give an example of radiation?
Answer:
Ok then answer my question
Explanation:
sorry i cant answer
My atomic mass is 35.453
Can you decompose a Single displacement reaction?
