Answers
Answer:
It's importance is the fact that you cannot solve s situation if you don't know it's problem.
Explanation:
Problem identification or identifying a problem by scientist I a major and a key step in solving a problem.
I mean, if you don't identify a problem, there is no way you can think about the solution not to talk of getting the solution.
So identification of a problem is infact one of the major step a scientist must take to solve a situation.
It's importance is the fact that you cannot solve s situation if you don't know it's problem.
Related Questions
How many significant figures are in 1.00 L
Answers
Answer:
3 significant numbers
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.
Answers
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.
is air a good conductor of electricity
Answers
Answer:
No, air is not a good conductor of electricity.
It is poor conductor.
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What is the smallest division on this balance? 1g 0.1g 0.01g 0.001g
Answers
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.
Answers
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.
How do starch and ATP store and supply energy?
Answers
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.
A bond in which valence electrons are shared is called covalent. is the process of breaking large molecules into smaller ones by adding water. If energy is released when a molecule is broken apart, it is a(n) reaction. The process of building up large molecules from small components is a(n) process. A lipid with four sites lacking hydrogen saturation is a lipid.
Answers
Answer:
A bond in which valence electrons are shared is called COVALENT.
HYDROLYSIS is the process of breaking large molecules into smaller ones by adding water.
If energy is released when a molecule is broken apart, it is an EXERGONIC REACTION.
The process of building up large molecules from small components is an ANABOLIC process.
A lipid with four sites lacking hydrogen saturation is a POLYUNSATURATED lipid.
Which model best represents the modifications to
the theory that Thomson's results made
necessary?
Answers
Answer:A
Explanation:
please help. fill out the blanks
Answers
2. Question
3. Observation
4. Research
5. Hypothesis
6. Design
7. Experiment
8. Conclusion
9. Results
What are SL units ?
Answers
Answer:
International System of Units
Definition: A system of physical units ( SI units ) based on the metre, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
Hope this helps!
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
Answers
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
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
Answers
Answer:
12 tablespoons
Explanation:
because 3/4 of 16 tablespoons is 12 tablespoons
16x 0.75 =12
What are the limitations of Bronsted-Lowery concept???
Answers
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.
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.
Answers
Answer:
"statement 2" for the first pair and "statement 1" for the second pair
Explanation:
there is an ice cream shop 6 blocks north of your hotel. how many minutes will it take to walk there and back
Answers
Answer:
This question is incomplete
Explanation:
This question is incomplete.
However, when all the required data are available, you can use the formula/steps below
Average speed/velocity (m/s) = distance (in metres) ÷ time (in seconds)
Time (in secs) = distance ÷ average speed/velocity
Kindly note that "blocks" is not a standard unit for distance measurement in science, hence the distance (since its a walking distance) must be in metres (or converted to metres if not in metres).
The distance in the formula is the distance from the hotel to the ice cream shop while the average speed is the distance covered per time as s/he walks to the ice cream shop and back. Hence, the answer gotten from the formula above will have to be multiplied by 2 (in order to get the time taken to walk to the ice cream shop and back) because the formula will only provide answer to one trip (time taken to walk to the shop).
After the multiplication mentioned above, the time in seconds should be converted to minutes by dividing the answer in seconds by 60
If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sample change
Answers
Answer:
The new volume of the sample is halved.
Explanation:
Data obtained from the question include the following:
Initial volume (V1) = V
Initial temperature (T1) = T
Initial pressure (P1) = P
Final pressure (P2) = quadrupled = 4P
Final temperature (T2) = doubled = 2T
Final volume (V2) =?
Thus, we can obtain the new volume of the same by using the combined gas equation as shown below:
P1V1 /T1 = P2V2 /T2
P × V/T = 4P × V2/2T
Cross multiply
T × 4P × V2 = P × V × 2T
Divide both side by T × 4P
V2 = (P × V × 2T) / (T × 4P)
V2 = V/2
V2 = ½V
Therefore, the new volume of the sample is halved .
This is the responding variable, or the variable you don't control.
a. Independent
b. Dependent
Answers
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 type of number is this. Water boils at sea level at 100.0 Celsius.
Answers
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
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.
Answers
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
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?
Answers
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
1. Which of the following metric relationships is INCORRECT?
A) 1 microliter = 10-6 liters
B) 10 decimeters = 1 meter
C) 103 milliliters = 1 liter
D) 1 gram = 102 centigrams
E) 1 gram = 103 kilograms
Answers
Metric relationships 103 ml = 1l, 1g = 102 centigrams and 1g = 103 kilograms are incorrect.
What are metrics?Metrics are a system which is based on decimal values and is used to measure the given quantity. It can be used to measure the length, volume, mass, time, speed, distance etc.
What is kilogram?A metric quantity of mass that is equivalent to one thousand grams A mass of one kilogram weighs a little over two pounds.
1 microliter =[tex]10^{-6}[/tex] liters10 decimeters make up 1 meter.1000 milliliters make up 1 liter. 1 gram has 100 centigrams.1 gram has[tex]10^{-3}[/tex] liters.1 kilogram = 1000 gramHence, option C, D and E are the incorrect options.
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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?
Answers
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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Describe the relationship between wavelength, frequency, and energy in electromagnetic waves. Which waves are the most dangerous?
Answers
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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c soluble bases are bases are called
Answers
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.
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?
Answers
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.
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
Answers
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:
what is the definition of anion
Answers
Answer:
Negatively charged ion.
Explanation:
Example:
Oxygen is an element containing negatively charged ions. Its valence number is minus 2.
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how can a mixture be separated into pure substances
Answers
Mixtures can always be separated again into component pure substances, because bonding among the atoms of the constituent substances does not occur in a mixture. Whereas a compound may have very different properties from the elements that compose it, in mixtures the substances keep their individual properties.
Explanation:
Bob walks 81m East and then he walks 103m East.
Answers
Answer:
81m + 103 m
= 184 m to the east
Given: Fe2O3(s) + 3 CO(g) –––––> 2 Fe(s) + 3 CO2(g); ΔH° = –26.8 kJ FeO(s) + CO(g) –––––> Fe(s) + CO2(g); ΔH° = –16.5 kJ determine ΔH° for the following thermochemical equation. Fe2O3(s) + CO(g) –––––> 2 FeO(s) + CO2(g)
Answers
Answer:
ΔH° = + 6.2 kJ
Explanation:
Fe₂O₃(s) + 3CO(g) –––––> 2 Fe(s) + 3 CO₂(g); ΔH° = –26.8 kJ ......... ( 1 )
FeO(s) + CO(g) –––––> Fe(s) + CO₂(g); ΔH° = –16.5 kJ .........( 2 )
Multiplying equation ( 2 ) by 2 and subtracting it from ( 1 )
Fe₂O₃(s) + 3CO(g) -2 FeO(s) - 2CO(g) ––> 2 Fe(s) + 3 CO₂(g) - 2Fe(s) - 2CO₂(g) ΔH° = –26.8 kJ - ( 2 x –16.5 kJ )
Fe₂O₃(s) + CO(g) -2 FeO(s)––> CO₂(g) ΔH° = –26.8 kJ + 33 kJ
Fe₂O₃(s) + CO(g) ––>2 FeO(s) +CO₂(g) ΔH° = + 6.2 kJ
Required ΔH° = + 6.2 kJ Ans .