Answer:
due to the overlaying layers of strata (layers of earth) an high pressure is created at the core. due to this it behaves like an solid rether than being a liquid... the lower mantle is not solid because in this case the overlaying strata doesn't produce that much pressure on it..
Explanation:
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When you rub an inflated balloonon your head on a dry day,it can make your hair stand up! what force is that?
When you rub an inflated balloon on your head and it makes your hair stand up, the force that makes the hair stand up is known as static electricity.
When the balloon is rubbed on the head, electrons from the hair atoms move into the balloon, thus making the balloon to be negatively charged and the hair positively charged due to loss of electrons.
Unlike charges attracts. Thus, when you try to pull the balloon away slowly, the positively charged hair and the negatively charged balloon will attract each other and this is usually what makes the hair stand up.
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Answer:
static electricity
Explanation:
this is because there is an imbalance between negative and positive charges
when you keep on rubbing, a negative charge is created which is carried by electrons.
when you pull the balloon away slowly, the opposite charges attract to each other which makes your hair attract to the balloon
isotopes Mg-24,Mg-25 and Mg-26 has natural abundance of 79.0%,10.0% and 11.0%. Calculate the relative atomic mass for isotopes Mg-24,Mg-25 and Mg-26.
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a bronsted lowry acid is defined as a substance that
Answer:
that donate H+ ion.
Explanation:
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If a chemical reaction occurs in a flask, and the flask becomes colder, the reaction was exothermic. true or false
Answer:
false
Explanation:
hope this helps you
Answer:
False, if the flask becomes colder it's endothermic. I hope this helps! :)
What two things do astronomers need to know about a star in order to calculate its luminosity or absolute magnitude? A.color and size B.color and distance C.distance and brightness D.size and distance
(đ) is answer of question.
Explanation:
However, the brightness of a star depends on its composition and how far it is from the planet. Astronomers define star brightness in terms of apparent magnitude — how bright the star appears from Earth — and absolute magnitude — how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs.
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Astronomers measures the luminosity of stars by determining the magnitude of brightness and distance from earth.Thus option C is correct.
What is luminosity?Luminosity of a star is the total amount of energy radiated by them to a distance. The luminosity vary from star to star based on the distance to them.
Luminosity is basically measured in terms of brightness as observed from the earth. Stars will make a group in certain shapes and certain number called constellation. The overall brightness can be then higher for each constellation.
Astronomers define the brightness of stars by the apparent distance from the earth whereas the absolute magnitude is defined is terms of standard distance of 32.6 light years. Hence, the option C based on distance and brightness is correct.
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5. What is a habitat?
a) An area of human development
b) A protected area for endangered species
c) The natural home or environment of an animal, plant, or other organism
d) An area where no species live
It's for science
Answer:
c) The natural home or environment of an animal, plant, or other organism
Explanation:
Please note that in order to post questions in Science, you must post in Science section, but not in History. You are asking a wrong question in the wrong section.
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Using the periodic table, explain which pair of the following gases have the most similar properties and why. Nitrogen (N), Fluorine (F), Neon (Ne), Krypton (Kr), and Oxygen (O).
Which of the following molecules contains only single bonds?
(A)CH3CH2COOH
(B) CH3COCH3
(C) HCN
(D)C2H6
(E) CO2
Answer:
D) C2H6
Explanation:
All the other molecules contain double (or triple) bonds except for C2H6.
How many cc of methane at not is required to react completely with 20cc of oxygen? Please helps meee!
Answer:22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO
2 and 44.8 L of water.
Explanation:
Learning Task No. 3: Complete the following sentences by filling in the appropri-
A horse runs 1 km in 15 s. What is the average speed
The average speed of the horse for the entire motion is 66.67 m/s.
The given parameters;
distance traveled by the horse, d = 1 km = 1,000 mtime of motion of the horse, t = 15 sThe average speed of the horse is calculated by dividing the total distance traveled by the horse by the time of motion.
The average speed of the horse is calculated as follows;
[tex]average\ speed = \frac{distance}{time} \\\\average\ speed = \frac{1000 \ m}{15 \ s} = 66.67 \ m/s[/tex]
Thus, the average speed of the horse for the entire motion is 66.67 m/s.
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Con que otras materias se relaciona la química
Answer:
Fisica, Astronomia, Biologia
Explanation:
con esta relacion entre ellas se puede explicar y comprender fénomenos de la naturaleza.
discuss the separation of solid of different sizes
Answer:
Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material. Filtration separates solids of different sizes.
Explanation:
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please help with the question attached
I need it in an hour
Answer:
iiiiiiddddiiilllooeiuehe
what is the amount of heat required to completely melt a 200
3. What is the energy of a photon that has a frequency of 2.3 x 1014 Hz?
The energy of a photon that has a frequency of 2.3 x 10¹⁴ Hz is 1.524 × 10-¹⁹J
HOW TO CALCULATE ENERGY OF A PHOTON:
The energy of a photon can be calculated by using the formula as follows:E = hf
Where;
E = energy of photon (J)
h = Planck's constant (6.626 × 10-³⁴J)
f = frequency of photon (Hz)
According to this question, a photon has a frequency of frequency of 2.3 x 10¹⁴ Hz. The energy of the photon can be calculated as follows:E = 6.626 × 10-³⁴ × 2.3 × 10¹⁴
E = 15.24 × 10-³⁴+¹⁴
E = 15.24 × 10-²⁰J
E = 1.524 × 10-¹⁹J
Therefore, energy of a photon that has a frequency of 2.3 x 10¹⁴ Hz is 1.524 × 10-¹⁹JLearn more at: https://brainly.com/question/23180082?referrer=searchResults
Which of the following is a liquid someone help!!!!!
THE ANSWER IS ON THE PICTURE HOPE IT HELPS
Someone pls help me I will make you brain
Answer:
a
Explanation:
i took test
Physics have been taking the Hippocratic Oath for more than 2,000 years. Among other things, to Serie doctors who take the oath promise to uphold doctor-patient confidentiality. Why do you think this is an ethical issue?
Answer:
Physicians and it is ethical because they promise to help
Explanation:
Số amin bậc một có cùng công thức phân tử C3H9N là
A. 3. B. 1. C. 2. D. 4
Answer:
A.3
Three primary amines
Ba amin chính
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Answer:
A catalytic converter
Explanation:
Diesel filters are used to clean fuel not emissions, engine injection puts fuel directly into the engine and a transmission clutch changes the cars transmission.
Answer:
carbon monoxide and nitrogen oxide are needed to be properly maintained
which of the following atoms is most likely to bond with another atom?
Answer:
c. chlorine, with an outer electron shell filled with 7 of a possible 8 electrons
Explanation:
Hope this helps!
The structure in the option A has 7 electrons in the outer shell of its electronic configuration , is unstable and so is most likely to form bond with another atom.
What is electronic configuration ?Electrons are arranged in various shells around the nucleus , this arrangement is called electronic structure or configuration.
Each shell can occupy certain fixed number of electrons.
Beside Option A , all the other configurations show stable structures as the last shell has eight electrons and are stable according to the octet rule.
The structure in the option A has 7 electrons in the shell and so is most likely to form bond with another atom.
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What does a
map
scale measure?
Answer:
Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.
Explanation:
For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.
when is it appropriate to form double or triple bonds in a lewis structure?
It is appropriate to form double or triple bonds in a Lewis structure when four or six electrons are shared.
A Lewis structure is a representation of a molecule using dots to show the valence electrons in the molecule. This dots are shown around the symbols of the elements.
However, in instances where four or six electrons are shared between bonding atoms, a double or triple bond is used. A double bond means that four electrons are shared. A triple bond means that six electrons are shared.
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carbon cycle carbon cycle
Hope you could get an idea from here.
Doubt clarification - use comment section.
Cho 200 g dung dịch NaCl 0,5M tác dụng hết với 400 ml AgNO3. Sau phản ứng thu được kết tủa và dung dịch không màu
a, Viết phương trình hóa học xảy ra?
b, Tính khối lương kết tủa tạo thành
c, Tính nồng độ mol của dung dịch AgNO3 đã tham gia phản ứng.
Answer:
Explanation:
a. NaCl+ AgNO3-----> NaNO3+ AgCl
b. Số mol của NaCl= 0,2*0,5= 0,1 (mol)
------> Số mol của kết tủa AgCl tạo thành= 0,1 mol (dựa vào phương trình hóa học)
-----> Khối lượng của kết tủa AgCl tạo thành= 0,1*143,5=14,35(g)
c. Số mol của AgNO3= số mol của NaCl= 0,1 (mol)
------> Nồng độ mol của dd AgNO3 đã tham gia phản ứng= [tex]\frac{0,1}{0,4}[/tex]=0,25(M)
Por que los egipcios podrían haber construido pirámides?
a noncovalent interaction between two molecules is known as
A non-covalent interactions between molecules are van der Waal's forces and hydrogen bonds.
What are non-covalent interactions?
Non-covalent interaction is an interaction which does not involve sharing of electrons and in this aspect it differs from covalent bond.It rather involves dispersed variations of electromagnetic interactions which are present between the molecules or within the molecule.
The energy released during the formation of these interactions is of the order of 1-5 kcal .They are classified as electrostatic, pi effects , van der waals forces and hydrophobic effects.
They are important in maintaining the three dimensional structure of large molecules such as proteins ,nucleic acids ,etc.They are also involved in biological processes . They heavily influence drug design process and design of materials.
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a. Which line represents travel at the fastest speed? Justify your answer.__
b. Describe the line that should be added for an object that is not moving with respect to the chosen reference point.__
Answer the question using 5 complete sentences and the vocabulary terms; velocity, position, and distance
Answer:
Which line represents travel at the fastest speed? Justify your answer.__
b. Describe the line that should be added for an object that is not moving with respect to the chosen reference point.__
Answer the question using 5 complete sentences and the vocabulary terms; velocity, position, and distance
Which line represents travel at the fastest speed? Justify your answer.__
b. Describe the line that should be added for an object that is not moving with respect to the chosen reference point.__
Answer the question using 5 complete sentences and the vocabulary terms; velocity, position, and distance
Explanation:
What is the wavelength of a radio wave that has a frequency of 9.40 X 10^8Hz?
3.1