Answer:
The comparison of the damages generated by Hurricane Donna with respect to others. The empirical information that can support this may be the number of homes affected or the cost of repairs after the hurricane has passed until it stops.
Explanation:
Empirical knowledge is the knowledge that it generates from experience and observation, perception tells us how something works and its natural characteristics.
If a scientist assures that it was the most severe hurricane, it is because the scientist is comparing the disasters generated by Hurricane Donna with other ones.
Answer:
I'm not quite sure.....
Explanation:
Dominick and eva are using the same type of stopwatches to measure the time it takes for a chemical reaction to occur. They can use the same stopwatch to measure the time.
Answer:
They did not repeat their tests multiple times.
Explanation:
It may seem that the question is incomplete. The complete question is as below: Dominic and Eva are using the same type of stopwatches to measure the time it takes for a chemical reaction to occur. They each use the same stopwatch to measure the time. These are their results:
Dominic: 78 seconds
Eva: 81 seconds
Why are their results unreliable and can lead to a pseudoscientific claim?
They did not repeat their tests multiple times.
They used the same type of stopwatch.
They did not change the reactants in their chemical reactions.
Only one person should have collected the data.
Dominic and Eva's results are unreliable and can lead to a pseudoscientific claim because they did not repeat their tests multiple times.
Repeating the test multiple times and finding the average of the measurement will minimize the chance of having error in the measurement and improve the accuracy of the outcome.
Thus, without repeated measurement, the reliability and the validity of the measurement would be in doubt.
Air has a mass of 1.2g and a volume of 4,555ml. What is the density
Answer:
Density = 0.00026 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]Density(\rho) = \frac{mass}{volume} [/tex]From the question
mass of air = 1.2 g
volume = 4,555 mL
Substitute the values into the above formula and solve for the density
That's
[tex]Density = \frac{1.2}{4555} [/tex]= 0.0002634
We have the final answer as
Density = 0.00026 g/mLHope this helps you
Which of the following is the best metaphor for an atom? A. A jigsaw puzzle piece B. A lego block C. A box
Answer:
A box
Explanation:
In quantum mechanics, the atom is metaphorically described as a box. In fact, the Schrödinger wave equation is based on the three dimensional box metaphor of the atom.
Thus, a box provides a convenient treatment of the atom as it represents the fundamental components of the problem of atomic structure, hence the answer.
C. A box
According to Erwin Schrödinger:He proposed the quantum mechanical model of the atom, which treats electrons as matter waves.Atoms are extremely small, typically around 100 picometers across. They are so small that accurately predicting their behavior using classical physics—as if they were tennis balls.For example—is not possible due to quantum effects. Every atom is composed of a nucleus and one or more electrons bound to the nucleus.Thus, the correct option is C.
Learn more:
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Suppose three different compounds composed of only nitrogen and oxygen were analyzed and the following data were obtained:
Mass of: Samples N O
Compound-A 1.500 g 0.955 g 0.545 g
Compound-B 2.000 g 0.933 g 1.067 g
Compound-C 3.000 g 0.913 g 2.087 g ———————————————————————————
a) Show that this data is consistent with the law of multiple proportions.
(b) If compound-B has the formula NO, what are the formulas of compounds A and C?
Answer:
I think it is b
Explanation:
but I'm not for sure that the answer is right
FeS+O2=Fe2O3+SO2????
FeS+O2=Fe2O3+SO2
Iron (II) sulfide + Oxygen gas
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If you walk 6336 feet, how many miles will you have walked?
Answer:
1.2 miles
Explanation:
15g is equivalent to how many mg
Answer:
15,000 mg
Explanation:
1 gram=1000 mg
15 gm=15,000 mg
who was the 33rd president of the United States?
Answer:
Harry S. Truman
Explanation:
Because he was the 33rd president
What does one calorie do to water
Answer:
The calorie is a unit of energy widely used in nutrition. For historical reasons, two main definitions of calorie are in wide use. The small calorie or gram calorie (usually denoted cal) is the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius (or one kelvin). The large calorie, food calorie, or kilocalorie (Cal, calorie or kcal) is the amount of heat needed to cause the same increase in one kilogram of water. Thus, 1 kilocalorie (kcal) = 1000 calories (cal). By convention in food science, the large calorie is commonly called Calorie (with a capital C by some authors to distinguish from the smaller unit). In most countries, labels of industrialized food products are required to indicate the nutritional energy value in (kilo or large) calories per serving or per weight.
Explanation:
What is the atomic number of an atom with 20 protons 18 electrons and 22 neutrons
Answer:
20
Explanation:
The atomic number is just the number of protons in an atom. So if the atom has 20 protons, the atomic number is also 20.
If you wanted to heat a liquid that would splatter when it is heated, you would heat it in a
Answer:
This question lacks options but it will be answered based on the fact that laboratory processes including heating are done using glasswares. The answer is:
Conical or Erlenmeyer/Boiling flask
Explanation:
Glasswares are simply laboratory equipments made of glass. They are used in performing the various laboratory processes like mixing, storing chemicals, heating and cooling etc. Glasswares includes flasks e.g volumetric flask, Erlenmeyer flask etc, beaker, test tube, graduated cylinder etc.
Heating a liquid that would splatter or splash in a laboratory requires using a glassware that can prevent spilling of the liquid outside it. A FLASK such as Erlenmeyer or boiling flask is best suited for this purpose because they generally have a conical shaped body with a narrow neck that prevents liquid chemicals from spilling when heated or shaken. Flasks can also be corked with a lid to prevent the liquid from coming out.
Ceramics resist moisture, do not conduct electricity, and can withstand temperatures higher than molten metals. Propose some uses of ceramics.
Answer:
Ceramics can be used in items where insulation is required or is preferred for the usage of the item. Examples would be bowls, plates, mugs, vases, pots, and other various items.
Explanation:
The reason why ceramics are often used in these items is due to the various properties that ceramics possess. As stated in the question, they are resistant to moisture, don't conduct electricity, and can withstand high temperatures.
Answer:can be used in a place where electric conductivity is not needed and in a place where moisture is not needed.
Explanation:we use ceramics for our bath room mostly because moisture is not needed there
Why is it necessary to research your experiment before starting it?
Answer: by researching the experiment, it helps you make sure you get everything right. If you didn't research it, there's a possibility you can get the experiment wrong.
what does alternate form mean
Answer:
different versions of existing forms
Explanation:
this question is for science. which options describes the particles of water as liquid water actively boils to become steam?
a. the particles will gain a large amount of kinetic energy.
b. The particles will increase in temperature as they gain thermal energy.
c. the particles will convert kinetic energy into thermal energy.
d. the particles will have the same average kinetic energy
Answer:
The correct option is;
a. The particles will gain a large amount of kinetic energy
Explanation:
As the water temperature reaches 100°C, which is the boiling point for water at atmospheric pressure, the continued heating is then used to break up the strong inter molecular forces between molecules of the water such that the individual molecules are free to move about and due to the high temperature, have gained considerable amount of kinetic energy for the to rise to appreciable height and to also spread.
The heat which converts water into steam is called latent heat as during the boiling phase, the temperature of the water remains constant.
d the particles will have the same average kinetic energy.
The pressure of 10.0 L of gas increases from 1.50 atm to 1240 mmHg. What is the final volume of the gas, assuming constant temperature?
Answer:
The final volume of gas is 9.19 L.
Explanation:
Given that,
Volume = 10.0 L
Initial pressure = 1.50 atm
Final pressure = 1240 mmHg
We need to calculate the final volume of gas
Using formula of ideal gas
[tex]P_{1}V_{1}=P_{2}V_{2}[/tex]
[tex]V_{2}=\dfrac{P_{1}V_{1}}{P_{2}}[/tex]
Where, P₁ = initial pressure
P₂ = final pressure
V₁ = initial volume
Put the value into the formula
[tex]V_{2}=\dfrac{1.50\times10\times760}{1240}[/tex]
[tex]V_{2}=9.19\ L[/tex]
Hence, The final volume of gas is 9.19 L.
Name the sub atomic particles present inside the nucleus of an atom
Answer:
protons, neutrons and electrons are the sub atomic particles
Use the periodic table to determine whether the compound is a molecule or a formula unit
What is the formula unit we are looking at?
This answer is incomplete plz edit it.
THX
convert eachh into scientific notation
4.060 x 10^5 →
7 x 10^3 →
5.0 x 10^-4 →
8 x 10^-2 →
Answer:
0.00580 →
3000 →
0.000908 →
200. →
Explanation:
yay
Answer:
[tex]\large \boxed{\mathrm{view \ explanation}}[/tex]
Explanation:
4.060 × 10⁵ (scientific notation)
The decimal point moves 5 places to the right.
⇒ 406000 (standard form)
7 × 10³ (scientific notation)
The decimal point moves 3 units to the right.
⇒ 700 (standard form)
5.0 × 10⁻⁴ (scientific notation)
The decimal point moves 4 units to the left.
⇒ 0.0005 (standard form)
8 × 10⁻² (scientific notation)
The decimal point moves 2 units to the left.
0.08 (standard form)
Which of the following statements about the nucleus is false? A. Able to be lost or gained in chemical reactions. B. Made up of protons an neutrons. C. None of these D. Contains nearly all of the mass of the atom.
Answer:
A. Able to be lost or gained in chemical reactions.
Explanation:
Only electrons are lost or gained.
Able to be lost or gained in chemical reactions. Hence, option A is correct.
What are atoms?An atom contains a central nucleus surrounded by one or more electrons.
A chemical reaction is not created or destroyed, it simply moves electrons from one atom to another, and does not change the nucleus of the atoms. The total mass of the matter remains conserved in any chemical change.
Hence, option A is correct.
Learn more about atoms here:
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#SPJ2
Which of the following regulates food labels? HACCP FSIS FDA EPA
Answer:
FDA
Explanation:
Answer:
FDA
Explanation: it right ;)
please am confused and need help
Answer:
1. C
2. C
3. A
4. C
5. True
6. C
Explanation:
1. C The answer is conduction because the heat was transferred through direct contact.
2. C The answer convection because the heat was transferred through a medium (liquid/gas).
3. A The answer is conduction because the heat was transferred through direct contact.
4. C The answer is radiation because the heat was transferred through thermal emission.
5. True. This is because the air that is warmed rises, causing the cool air to replace it. You can picture it like the scenario in question 2.
6. C
What is the role of critical thinking in scientific process
Answer:
Critical thinking initiates the act of hypothesis.
Critital thinking initiates the hypothesis. By thinking you will come across a question you want to answer. In the conculsion crititcal thinking is used again to validate the hypothesis.
If the yellow car travels from -70 m to 20 m in 5 seconds, what is its velocity?
Answer:
18 m/s
Explanation:
v = d/t = 90/5=18
Tick the statement which is not correct ( a) When a beam of light is passed through a colloidal solution, the path of light gets illuminated ( b ) when an electric current is passed through a colloidal solution , colloidal particles move towards the oppositely charged electrodes. ( c ) when an electric current is passed through a suspension , particles move towards the oppositely charged electrodes. ( d ) when an electric current is passed through an electrolyte solution , particles move towards the oppositely charged electrodes.
Answer:
option a is not correct
What does the slang term "the Boards" refer to?
Answer:
It can mean "boardwalk" or a "board of a school."
~Mia Sedillo~
Describing Matter Matter is anything that has______ and takes up space (_________). The _______________ of an object measures the amount of matter or substance the object contains. Volume is the measure of _________________ by the object.
Answer:
Mass; mass; amount of space taken up.
Explanation:
Matter is anything that has mass and takes up space. The mass of an object measures the amount of matter or substance the object contains.
Volume is the measure of the amount of space taken up by the object.
The SI units for mass and volume are kilogram (kg) and cubic meter (m³) respectively.
Generally, matter exists in three (3) distinct phases and these are;
1. Solid: it is the state of matter in which the physical substance has a definite shape and fixed volume but not compressible. Examples of solids are pen, screwdriver, television, car etc.
2. Liquid: it is the state of matter in which the physical substance can be poured and takes the shape of its container. Also, liquids generally have a definite volume. Examples of liquids are urine, water, milk, blood etc.
3. Gas: it is the state of matter in which the physical substance has no definite shape or volume and as a result fills all available space. Also, gases are easily compressible and can flow. Examples of gases are hydrogen, oxygen, argon, nitrogen etc.
state two things you notice about a metal when being touched
Answer: one thing you may notice when you touch metal is a small electric shock, and depending on the temperature, it could be hot, or cold.
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Which of the following is not true about
both scientific laws and scientific
theories?
Both are based on hypotheses
Both can be used to make predictions
Both are used to explain why a phenomenon
happens
Both can be modified if new evidence arises
Your question has been heard loud and clear.
Both scientific laws and scientific theories are not based on hypothesis.
Because , scientific laws are proven and so they are real not hypothetical.
Whereas scientifc theories can be hypothetical.
Thank you
Burets are often used to carefully measure the amount of liquid added to a reaction. The long thin buret tube is marked every milliliter and every tenth of a milliliter. Which of the following measurements is correct for a volume of liquid in a buret?
a. 30 ml
b. 32 mL
c. 32.0 mL
d. 32.01 mL
Answer:
c. 32.0 mL
Explanation:
Buret can measure upto one tenth of a mL . That means it can measure upto one decimal point of a mL . Out of given measurement 32.0 mL reads upto one decimal point of mL so this reading seems to be the reading taken of a liquid in a buret.