Explanation:
D : a negative charge repels a negative charge because like charges repel unlike the unlike charges that attract according to the fundamental law of electrostatics
what will happen to the atoms or sbstance when it freezes
Explanation:
Freezing is the process that causes a substance to change from a liquid to a solid. Freezing occurs when the molecules of a liquid slow down enough that their attractions cause them to arrange themselves into fixed positions as a solid.
_______ is an example for isotone. a)argon and carbon b) uranium and carbon c) carbon and boron d)sulphur and boron.
Isotones are nuclides that have the same neutron number but a different proton number. Therefore the answer is C. boron and carbon.
Answer:
c) carbon and boron
Explanation:
They have the same number of neutrons but different number of protons.
They both contain 7 neutrons
mass=35g
density=5 g/cm3
what is the volume?
[tex]\large \mathfrak{Solution : }[/tex]
given values :
mass = 35 g
density = 5 g/cm³
we know that :
[tex] \boxed{density = \dfrac{mass}{volume} }[/tex][tex]5 = \dfrac{35}{vol} [/tex][tex]vol = \dfrac{35}{5} [/tex][tex]volume = 7 \: cm {}^{3} \: or \: 7 \: litres[/tex]Does dried coconut give blue black color when iodine solution is added in it.
Answer:
I cant give a 100% answer but it will give a black color when low starch
Explanation:
Iodine test is used to determine the presence of starch in food items. If iodine is added to any food item and it causes the food item to turn to a blue-black color
mark brainiest please
Which phrase is an accurate description of the process of erosion
The correct option is C. Erosion is the process by which the earth surface get worn down. It involves the removal of soil, rocks or dissolved material from one location and its transportation to another location.
What is the solution to pollution?
Scientific Notation: Which of the following is equivalent to 2.98 x 10^-7
A. .000000298
B. 20.86
C. 2086
D. 29,800,000
Answer: A
Explanation: 10^-7 means that the decimal point is 7 digits to the left (the "-" sign) of the 2. Move the decimal point left seven times, putting a "0" for each step. and then place the decimal point. A "0" is added to the left of the decimal point for clarity.
2.98x10^-7
1st) 0.298x10^-6
2nd) 0.0298x10^-5
etc, for 7 times
0.000000298
The scientific notation for 2.98 x 10^-7 will be .000000298. The correct option is A.
What is scientific notation?Scientific notation is a method of writing extremely large or extremely small numbers.
When a quantity between 1 and 10 is multiplied by a power of 10, it is written in scientific notation.
The proper scientific notation format is a x 10^b, where an is a number or decimal number with an absolute value greater or equal one and less than ten.
The b is the power of ten required for scientific notation to be mathematically equivalent to the original number.
A positive exponent indicates that the decimal point has been moved that many places to the right.
A negative exponent indicates that the decimal point has been shifted that many places to the left.
As in the given number, 2.98 x 10^-7 the exponent is negative so the decimal will shift seven times to left of the digit making it .000000298.
Thus, the correct option is A.
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12579 nm rounded to 3 significant figures is
[tex]\\ \sf\longmapsto 12579nm[/tex]
[tex]\\ \sf\longmapsto 12579\times 10^{-9}m[/tex]
[tex]\\ \sf\longmapsto 1257.9\times 10^{-8}m[/tex]
[tex]\\ \sf\longmapsto 12.5\times 10^{-6}m[/tex]
[tex]\\ \sf\longmapsto 12.5\mu m[/tex]
Answer:
1.26e-5
Explanation:
Change 12579 nm to meters first, it becomes 1.2579e-5, then rounding it to 3 significant figures becomes 1.26e-5.
Ethanol had a boiling point of 78.4°C. Propane has a boiling point of -42°C. Suggest why.
Answer:
Chemical compounds all have different melting points.
Explanation:
chemical compounds all have different freezing and boiling points. Different chemical compounds means they will have different chemical structures.
what kind of graph is shown above ?
Answer:
its bar graph
Explanation:
in 1 to 2 sentences explain why a structural formulas are good for depicting polymers
Answer:
they explain the properties and structure of the compound which empirical molecular formulars cannot explain
The structural formulas are good for depicting polymers because polymers are the chemical compounds attached to the long chain with ac other which is impossible to represent other than the structural formula.
What are structural formulas?The structural formulas are the graphic representation or diagrammatical representation of the structure of any chemical formula in organic and inorganic chemistry they are mostly used.
In Polymers, they are long chains of chemicals compound can be shown diagrammatically or graphically to understand the attachment t of the bonds within them which signifies the physical properties too.
Therefore, polymers are the chemical compounds attached to the long chain with ac other which is impossible to represent other than the structural formula which is why structural formulas are good for depicting polymers.
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Pls helllllpppppp!!!!!
how was the interior of the atom was experimentally dicovered?
Answer:
Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup."
13 (01.05 HC)
In science class, the teacher, Mr. Jacobs, breaks a wooden board in half as a demonstration. Carol states that she believes this is an example of a physical change. Which of the following best explains If Carol's calm
is correct or incorrect? (1 point)
This is correct because each plece of wood has the same composition
This is correct because the wood has changed its composition
This is incorrect because each plece of wood has the same composition
This is incorrect because the wood has changed its composition.
This is correct because each piece of wood has the same composition.
Hope it helps! Please do comment
Within atoms, what kind of energy
is stored?
What was important about the copernican revolution?
A. It was the first time a new theory was published in a book.
B. The scientific community never accepted it.
C. It demonstrated that scientific understanding was always changing.
D. It caused an immediate shift in accepted ideas.
8.7351 x 10-3 to ordinary notation:
Why is titan a good name for Saturns largest moon?
The only type of movement particles in a solid do is
Answer
:small vibrational movements.
Explanation:
The particles of a solid are not able to move out of their positions relative to one another, but do have small vibrational movements.
___________________________________________________________
-Darkspirit-
Which of the following is not a magnetic material A cobalt B iron C nickel D plastic E steel
Answer:
D. plastic[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
What is 2.4 in scientific notation ?
Answer:
2.4 × 10-1
Explanation:
Jerod used a golf club to hit a ball what was the action and reaction
Answer: I'm pretty sure the action is Jerod swinging the golf club and the reaction is hitting the ball
Explanation:
does nail polish remover sink or float
nail polish remover float
Answer:
it will float on water
explanation:
Geekette hypothesized that since it floated on the water, like ice does, it must be less dense. ... According to Ken Johnsen, who lists his expertise in chemistry, the components of nail polish indeed make it less dense than water
Which of these would be called results
Counting fruit flies
Number of fruit flies
Seeing fruit flies on an apple
Wondering why fruit flies are on Apple
lithium oxide+sulphuric acid
Answer:
sulfurous acid with lithium hydroxide to form water and lithium sulfite. The balanced reaction equation is b. H2SO3(aq) + 2 LiOH(aq) → 2 H2O(l) + Li2SO3(aq).
li2so4+h20 (hope it helps )
The area of a telescope lens is 6.439 × 103 mm2. (a) What is the area in square feet (ft2)? Enter your answer in scientific notation. (b) If it takes a technician 43.5 s to polish 1.53 × 102 mm2, how long does it take her to polish the entire lens?
Answer:
a) Area of the telescope lens is [tex]$1.076391014 \times 10^{-5} \mathrm{ft}^{2}$[/tex]
b) Technician needs to clean the lens [tex]$1.83 \times 10^{3} s$[/tex].
Explanation:
a) The area of the lens is [tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}$[/tex]
To convert it into [tex]$f t^{2}$[/tex]
[tex]$1 \mathrm{~mm}=0.00328084 \mathrm{ft}$[/tex]
[tex]$1 \mathrm{~mm}^{2}=(0.00328084)^{2} \mathrm{ft}^{2}$[/tex]
[tex]$1 \mathrm{~mm}^{2}=1.076391014 \times 10^{-5} \mathrm{ft}^{2}$[/tex]
So,
[tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}=6.439 \times 10^{3} * 1.076391014 \times 10^{-5} \mathrm{ft}^{2} .$[/tex]
[tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}=6.93088174 \times 10^{-2} \mathrm{ft}^{2}$[/tex]
b) Time required to polish a entire area of lens
[tex]$=6.439 \times 10^{3} \mathrm{~mm}^{2} \times \frac{43.5 \mathrm{~s}}{1.53 \times 10^{2} \mathrm{~mm}^{2}}$[/tex]
[tex]$=1.83 \times 10^{3} \mathrm{~s}$[/tex]
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https://brainly.com/question/10401258hydrogen bond is an example for? (PLEASE HELP!)
a) ion- dipole Interaction
b)dipole - dipole Interaction
c) dipole - induced dipole Interaction
d) induced dipole- induced dipole Interaction
Answer:
b)
Explanation:
hydrogen bond is a form of dipole-dipole interaction but with more unique properties
_____________is when the body is in an erect postion with feet slightly apart and your palms are facing forward with the thumbs pointed away from the body.
Answer:
anatomical position is the answer
What is the mass of a piece of silver that when dropped into a 100.0ml graduate cylinder cause the water level to rise from 12.65ml to 18.76 ml?
Answer:
dgdgdf
Explanation:
and yeah thatds it
Can someone do this for me? Pleaseeeee I’m very busy.
The directions tell you what to do.
Answer:
in number 7 its Gas because the molecules are afloat and/or moving rapidly.
Explanation:
True or false?
1. Cells carry on the processes that keep organism live?
True or false?
2. The digestive system is in the levels of organization under organ?
