how are sound waves different from the waves in the sea or the ripples on water???
Answer:
water wave shake energy over the surface to the sea, while sound waves thump energy trough the body of the air. sound waves are compression waves
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Bob walks 81m East and then he walks 103m East.
Answer:
81m + 103 m
= 184 m to the east
basic atomic structure of argon
Answer:
structure of argon
Explanation:
The nucleus contains 18 protons ( red) and 22 neutrons (orange). 18 electrons (white) occupy shells ring.
If a solid has a density of 4.0 g/cm^3, what volume of the solid has a mass
of 24 g? Show work.
Answer:
Volume = 6 cm³Explanation:
Density of a substance is given by
[tex]Density = \frac{mass}{volume} [/tex]
From the question
Density = 4.0 g/cm³
mass = 24g
Substitute the values into the above formula and solve for the volume
That's
[tex]4 = \frac{24}{v} \\4v = 24[/tex]
Divide both sides by 4
v = 6
We have the final answer as
Volume = 6 cm³Hope this helps you
Which actions would increase the rate at which salt dissolves in water? Stir the water. Crush the salt. Use less water. Heat the water. Cool the salt.
Answer:
Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.
c soluble bases are bases are called
Answer:A soluble base is called an alkali if it contains and releases OH− ions quantitatively. However, it is important to realize that basicity is not the same as alkalinity. Metal oxides, hydroxides, and especially alkoxides are basic, and conjugate bases of weak acids are weak bases.
what is the definition of anion
Answer:
Negatively charged ion.
Explanation:
Example:
Oxygen is an element containing negatively charged ions. Its valence number is minus 2.
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A cake recipe calls for 0.75 cups of milk, but all you have is a tool that measures out one tablespoon. How many tablespoons of milk needs to be put in the cake batter? Hint: 16 tablespoons = 1 cup
Answer:
12 tablespoons
Explanation:
because 3/4 of 16 tablespoons is 12 tablespoons
16x 0.75 =12
Describe the relationship between wavelength, frequency, and energy in electromagnetic waves. Which waves are the most dangerous?
Answer:
Explanation:
relation between energy wavelength and frequency.....
we know that energy of photon is
E=hf but
v=fλ
f=v/λ when v=c(speed of light) then f=c/λ
putting the value of f in the equation of photon
E=hc/λ this equation gave a relation between wavelength frequency and energy in electromagnetic waves
among electromagnetic waves UV rays are most dangerous because exposure to these radiation cause serious problems in living organism
Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. The relation that we use in case of electromagnetic wave is E=hc/λ
What is electromagnetic wave?Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave
There is a relation between energy of wave. frequency of wave, and wavelength of wave
Mathematically,
E=hc/λ
where,
E = energy of electromagnetic wave
h is planks constant having value 6.67×10⁻³⁴js
c is speed of light that is 3×10⁸m/s
λ is the wavelength of electromagnetic wave
Thus the relation that we use to find the energy of electromangetic wave is E=hc/λ
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The half-life of radium-226 is 1590 years. if a sample contains 100 mg, how many mg will remain after 1000 years?
Answer:
[tex]a=64.7mg[/tex]
Explanation:
Hello,
In this case, we need to remember that for the required time for a radioactive nuclide as radium-226 to decrease to one half its initial amount we are talking about its half-life. Furthermore, the amount of remaining radioactive material as a function of the half-lives is computed as follows:
[tex]a=a_0(\frac{1}{2} )^{\frac{t}{t_{1/2}} }[/tex]
Therefore, for an initial amount of 100 mg with a half-life of 1590 years, after 1000 years, we have:
[tex]a=100mg(\frac{1}{2} )^{\frac{1000years}{1590years} }\\\\a=64.7mg[/tex]
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Mr. Krabs created a secret ingredient for a breath mint that he thinks will "cure" the bad breath people get from eating crabby patties at the Krusty Krab. He asked 100 customers with a history of bad breath to try his new breath mint. He had fifty customers (Group A) eat a breath mint after they finished eating a crabby patty. The other fifty (Group B) also received a breath mint after they finished the crabby patty, however, it was just a regular breath mint and did not have the secret ingredient. Both groups were told that they were getting the breath mint that would cure their bad breath. Two hours after eating the crabby patties, thirty customers in Group A and ten customers in Group B reported having better breath than they normally had after eating crabby patties. What is the independent variable?
Answer:
Type of breath mint
Explanation:
The independent variable, in this case, would be the type of breath mint given to each study group.
An independent variable refers to a variable whose variation does not depend on another variable or factor. In research, the independent variable stands alone and the researcher can control or manipulate it in order to measure its effect on some other variables.
In the case of Mr. Krabs, the two types of breath mints administered to the two study groups represent the independent variable. Any differences in the experience of the two study groups can be attributed to the difference in the breath mint taken.
A cylinder rod formed from silicon is 46.0 cm long it has a mass of 3.00 kg. The density of silicon is 2.33 g centimeters cubed. What is the diameter of the cylinder?
Answer:
Explanation:
First find the volume from the density.
d = mass/volume
mass = 3.00 kg = 3000 grams
density = 2.33 g/cm^3
volume = mass/ density
volume = 3000 / 2.33
volume = 1287.6 cm^3
============================
Next use the volume to find the radius.
V = pi * r^2 * h
V = 3.14 * r^2 * 46
1287.6 /46 = 27.99
27.99 / 3.14 = 8.91
r^2 = 8.91
r = 2.99
2r = d = 5.97
What is the smallest division on this balance? 1g 0.1g 0.01g 0.001g
Correct Answer: 0.01g
The scales and balances have various divisions and units that define the accuracy of the measurement system. The smallest division on the balance scale is 0.001 gm. This, option D is correct.
What is scale?Scales have been defined as the measurement system that estimates the quantity of the various substances in various units including, centimeters, meters, kilograms, grams, milligrams, liter, milliliters, etc. These units are interconvertible.
1 gram is the while part of the gram unit, 0.1 shows one-tenth part of the gram, 0.01 shows the one-hundredth part of the gram, and 0.001 shows the thousandth part of the gram. one gram is the largest number on the scale and 0.001 gm is the smallest number on the balance.
Therefore, option D. 0.001 gm is the smallest number.
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Select the correct answer. An iron nail is made up of particles. What is true about the particles? A. They move all over the place. B. The force of attraction between them is small. C. The spacing between them is large. D. They stay in place and vibrate.
Answer:
Option B is correct.
Explanation:
Since an iron nail is solid and have very large force of attraction between the particles therefore the particles can't move freely and could only vibrate at it's place.
Answer:
Option B is correct.
Explanation:
Since an iron nail is solid and have very large force of attraction between the particles therefore the particles can't move freely and could only vibrate at it's place.
In each pair of statements, choose the example that is more reliable.
Statement 1
The company Herbal Remedies Inc.
announced today that its antiobesity skin
treatment is safe and effective.
Statement 2
The US Food and Drug Administration (FDA)
announced today that cancer treatment X,
manufactured by Pharma Inc., is safe and
effective.
Statement 1
An independent chemical analysis paid for by
local residents determined that wells are
contaminated with dioxin at a concentration
of 3 ppb.
Statement 2
The chemical company Chemicals Inc. insists
that local groundwater has not been affected
adversely by a leak in its waste handling
system.
Answer:
"statement 2" for the first pair and "statement 1" for the second pair
Explanation:
How do starch and ATP store and supply energy?
Answer:
Explanation:
ATP is used for immediate energy and short-term storage, while starch molecules are stable and can be stored for a long time
ATP is used for immediate energy and long-term storage, while starch molecules are unstable and can be stored for a short amount of time.
why does spoiled food produce foul smell
Answer:
There is spoilage microbes growing on the food, such as bacteria, yeasts, and mold. The odor can either come from the chemicals that are released from the food as the microbes decompose it down, or the chemicals are produced by the microbes themselves.
Answer:
When food goes bad and starts to become pungent, it is most often due to the growth of spoilage microbes such as bacteria, yeasts and mold. Odors can come from two sources: chemicals that are released from the food as the microbes decompose it, or chemicals produced directly by the microbes themselves.
Hope this answer correct :)
Question
Drag each label to the correct location in the table
Match each career to the correct career pathway.
Science and Mathematics
Engineering and Technology
anthropologist
fuel ce technician
Civil drafter
computer programmer
meteorologs
electrice
Submit
Answer: Science and Mathematics- Anthropologist, Meteorologist
Engineering and technology- Fuel Cell Technician, Computer programmer, electrical Drafter, Civil Drafter
Answer:
i have the same question
Explanation:math and science is the meteorologs and the anthropologist
What is a scientific theory? (2 points)
a
A law that is always true
A hypothesis about nature
C с
An educated guelmes based on observations
d
An explanation of how the natural world works
Answer:A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.
Should be right
A scientific theory is defined to be the part and explanation of the natural world, its phenomena, and the detailed description of the working. Thus, option D is correct.
What is the relation between scientific theory and hypothesis?
A scientific theory is said to be the well-accepted and well-proposed explanation of the topic matter that has repeatedly undergone experiments to prove its ingenuity and uses well-constructed facts and hypotheses.
The hypothesis is the basis of the scientific theory as it gives the idea about the subject issue for which the experimental design is set for the analysis and reach a conclusion.
The scientific theory is proposed based on a hypothesis that assumes something based on limited evidence that is evaluated and undergoes experiments for it to be proved true or false.
Therefore, option D. a scientific theory is the explanation of the working of the natural world.
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Can someone help me with this please....
a. vinegar
b. Mineral deficiencies in the body can make joint pain worse. Because Vinegar contains the calcium, magnesium, potassium, and phosphorus your body needs, it helps as a supplement and therefore reduces pain.
1. in making fertilisers which are chemical compounds or salts to increase fertility of soil.
2. lithium hydroxide is used in space because of its high absorption of carbon dioxide and the small amount of heat produce by the reaction.
3. Acid rain has a lower pH than "normal" rain . Rain is naturally somewhat acidic with a pH between 5.0-5.5 typically. Acid rain has a pH that is below this: 4.4-4.2
4. lemon juice is an anti bacterial and a good germicidal solution which helps in removing the unseen bacteria on our hands.
Hope this helps :)A mineral is described as "metallic." This description refers to its:
Answer: properties
Explanation:
The element which has the properties
Mallablity
Ductility
Lusterous
High electric. Conductivity
High tensile strength is said to be metal.
Write a simple procedure for measuring out 2.6 grams of sodium bicarbonate NaHCO3 or commonly known as baking soda?
PLEASE I REALLY NEED THIS!!! :/
Answer:
See explanation
Explanation:
If I intend to measure 2.6 g of sodium bicarbonate, I need a spatula, a filter paper, and a weighing balance.
The filter paper is placed on the balance and the balance is adjusted to read zero. The spatula is now used to collect the sodium bicarbonate solid from its container and gradually drop it on the filter paper while watching the mass read out by the balance. This continues until the balance reads 2.6g.
Question 5(Multiple Choice Worth 3 points)
(01.04 LC)
Complete this sentence. The electrical conductivity of a sample will
when the size of the sample increases.
O decrease
O stay the same
O increase
O be unable to be determined
Answer: B. Stay the same
Which of these steps would most likely be part of a lab procedure?
Write a hypothesis to answer a question.
Write a title at the top of a completed lab report.
Record the time to complete a chemical reaction.
Create a question on the cause of a chemical reaction.
Answer:
the answer is C
Explanation:
Record the time to complete a chemical reaction
The step that will be part of a lab procedure is; "Record the time to complete a chemical reaction."
A lab procedure refers to something that is done in the laboratory as part of an experiment.
If we look at the options carefully, we will notice that the only thing that is part of a laboratory experiment is "Record the time to complete a chemical reaction."
This action can be carried out in a live lab procedure.
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how many electrons does the predictable (most common) ion of flourine contain
Answer:
8
Explanation:
This is because fluorine has the 9 electrons but because it's an ion it gives out an electron thereby losing an electron...so the electron number is 8
Answer:
8electron
Explanation:
Fluorine has 9electron on its orbit although it loses one weak electron to another strong element during ionization. example: Cl-F
in which atom is the number of protons equal to the number of neutrons?
Answer:
neutral
Explanation:
What type of number is this. Water boils at sea level at 100.0 Celsius.
Answer:
100
Explanation:
answer is to simple why it is 100.0 when you write the number down on your calculator it give you 100 because the last zero does not count
Which of the following MOST directly influences a measurable outcome in an experiment? a. An independent variable b. A variable hypothesis c. A dependent variable d. Previous information
Answer:
A). An independent variable
Explanation:
The Independent variable is characterized itself as the variable that is controlled or manipulated by the experimenter to observe its direct impact on the dependent variable. It is a variable that is not dependent and can stand alone. For example, if a student aims to observe the impact of temperature on solubility of a substance(sugar/salt) in a liquid, the temperature will be the independent variable as any change in the temperature will directly affect the solubility power of the liquid. Thus, option A is the correct answer.
Answer:
D.
Explanation:
This is the responding variable, or the variable you don't control.
a. Independent
b. Dependent
Answer:
The dependnet varaible(B)
Explanation:
The dependent variable changes as the independnet variable changes. In an experiment you change the independnet varaible and you observe the resulting changes in the dependent variable.
What are the limitations of Bronsted-Lowery concept???
Answer:
There is no limitation at all because that is the basic theory of solution electrolysis
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Limitation of Bronsted Lowey concept:
✭It doesn't describe the acidic and basic nature of organic compound.
✭It also doesn't describe the acidic, basic as well as amphoteric gaseous molecule.
✭According to Bronsted Lowery concept same compound in one reaction act as acid and another reaction act as base so, it is difficult to predict the exact acid or base.