Answer:
The three methods used to treat water are
Filtration SedimentationDistillationExplanation:
These methods used include physical processes, biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light.
A 1.85 kg textbook is sitting on a bookshelf 2.23 m above the floor. How much potential energy does it have?
Answer:
[tex]\boxed {\boxed {\sf 40.4299 \ Joules}}[/tex]
Explanation:
Potential energy is energy due to position. It is the product of mass, height, and acceleration due to gravity.
[tex]PE= m \times g \times h[/tex]
The mass of the textbook is 1.85 kilograms. Assuming this is on Earth, the acceleration due to gravity is 9.8 meters per square second. The height is 2.23 meters.
m= 1.85 kg g= 9.8 m/s²h= 2.23 mSubstitute the values into the formula.
[tex]PE = 1.85 \ kg \times 9.8 \ m/s^2 \times 2.23 \ m[/tex]
Multiply the first 2 numbers together.
[tex]PE=18.13 \ kg*m/s^2 *2.23 \ m[/tex]
Multiply again.
[tex]PE= 40.4299 \ kg*m^2/s^2[/tex]
1 kilogram square meter per square second (1 kg*m²/s²) is equal to 1 Joules (J) Our answer of 40.4299 kg*m²/s² is equal to 40.4299 J[tex]PE= 40.4299 \ J[/tex]
The textbook has 40.4299 Joules of potential energy.
What causes the "heat island" effect?
a. heat produced from a large number of people
b. the materials used in building cities retain heat
c. the large amount of reflected light from glass windows
d. all of the above
Please select the best answer from the choices provided
A
B
C
D
What is the chemical name for 1 nitrogen atom,
2 hydrogen atom?
NH3 has 1 Nitrogen atom and 3 hydrogen atoms.
A __________ is a feature or some influence that contributes to a result or outcome.
factor
theory
light year
spectrograph
Plz Answer Fam & Con Chemistry (8TH GRADE)
Answer:
claw techniques
Explanation:
because it is
which method is suitable for collection a a
carbon dioxide.Explain
Answer:
Carbon dioxide can be collected over water. Carbon dioxide is slightly soluble in water and denser than air, so another way to collect it is in a dry, upright gas jar.
Explanation:
Scientist introducing a gene to the DNA of these fish that cause the fish to glow an example of which application of biotechnology?
A. Artificial selection
B. Genetic Engineering
C. cloning
D. Artificial intelligence
Answer:
The correct answer is B
Explanation:
Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.
What is genetic engineering?Genetic engineering is the process in which we alter the genetic makeup of an organism to produce desired characterictics in that organism.
So we can conclude that Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.
Learn more about here Genetic engineering: https://brainly.com/question/2780091
a mieral is ______
a. man-made
b. alive
c. non-living
d. a plant
Answer:
C
Explanation:
A mineral is a composition of different rocks, therefore it is not alive and non livine. It is also not man made, but natural
Balance Cl2+NaBr=NaCl+Br2
select all that are heterogeneous mixtures.
A) soil
B) steel
C) concrete
D) kool-aid
E) open can of soda
What is an example of Chemical energy to thermal energy to electrical current?
Answer:
Coal is burned at power plant.
Explanation:
the chemical Energy is released as coal changes
have a good day
Which of the changes listed below would shift this reaction to the right?
A. Decrease of pressure
B. Addition of Cl2
C. Removal of O2
D. Increase of pressure
Answer:
D: Increase of pressure
The type of stem cells that are thought to be pluripotent are found in
A.) embryos
B.) developed tissues
C.) cord blood
D.) the placenta.
Answer:
Embryonic stem cells
Explanation:
Answer:
C.)
Explanation:
( Hope this helps 0_0 )
Titaium oxside is often added to food to color it white. If a jelly bean contains approximately 1.28x10-5 moles of TiO2, how many grams of TiO2 are in a jelly bean
Answer:
1.02 × 10⁻³ g
Explanation:
Step 1: Given data
Number of moles of titanium (IV) oxide in 1 jelly bean (n): 1.28 × 10⁻⁵ moles
Step 2: Calculate the mass (in grams) corresponding to 1.28 × 10⁻⁵ moles of TiO₂
To convert moles to mass, we need a conversion factor. In this case, it is the molar mass of TiO₂: 79.87 g/mol.
1.28 × 10⁻⁵ mol TiO₂ × 79.87 g TiO₂/1 mol TiO₂ = 1.02 × 10⁻³ g TiO₂
How much of a 100.0 gram sample of Gold-98 remains after 8.1 days if
its half-life= 2.7 days?
50.0 g
12.5 g
6.25 g
25.0 g
Answer:
If half-life is 2.7 days then 8.1 days is three half-lives. 12.5%, or 12.5g, of AU-198 would remain.
Explanation:
which is the country to use paper currency
Answer:
the first country that uses paper currency is china
the first use of paper currency can be traced back to the year 806 AD in China where they were used as flying currency
please answer!!! 4x + 5x + 6b
Answer:
9x +6b
hope this helps
have a good day :)
Explanation:
What can be different between the products and reactants in a balanced chemical equation?
Answer:Reactants are starting materials and are written on the left-hand side of the equation. Products are the end-result of the reaction and are written on the right-hand side of the equation.
Explanation:
The reactants in a balanced chemical reaction are the starting material which reacts together to give the products in by the regrouping of atoms in the reactants.
What is a balanced chemical equation?The balanced chemical equation of a reaction represents the perfect stoichiometry of each reactants and products with their states of matter in brackets.
In a balanced reaction, the number of each element in the reactant side must be equal to their number in the product side. The number of each elements and groups in a reaction can be balanced by multiplying with suitable integers.
The atoms in the reactants are regrouping to form the products. Thus, the identity of the new products is entirely different form that of reactants in the reaction.
To find more on balanced reactions, refer here:
https://brainly.com/question/14280002
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Please, can anyone confirm that my answers are correct?
Will give brainiest to first correct answer! (No links pls)
PLZ HELP
subtracting atomic number from atomic mass will give the number of
Answer:
:)
Explanation:
If we subtract the atomic number from the atomic mass: atomic mass - atomic number = number of protons + number of neutrons - number of protons. Thus we get the number of neutrons present in an atom when we subtract the atomic number from the atomic mass.
The shape of the methane molecule(ch4) is called
Answer:
Tetrahedral
Explanation:
How many joules of heat are needed to raise the temperature of 30.0 g of aluminum from 22°C to 80°C, if the specific heat of aluminum is 0.90 J/g°C?
Answer: There are 1566 joules of heat needed to raise the temperature of 30.0 g of aluminum from 22°C to 80°C, if the specific heat of aluminum is 0.90 J/g°C.
Explanation:
Given: Mass = 30.0 g
Specific heat = [tex]0.90 J/g^{o}C[/tex]
[tex]T_{1} = 22^{o}C[/tex]
[tex]T_{2} = 80^{o}C[/tex]
Formula used to calculate the heat energy requires is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat capacity of substance
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 30.0 g \times 0.90 J/g^{o}C \times (80 - 22)^{o}C\\= 1566 J[/tex]
Thus, we can conclude that there are 1566 joules of heat needed to raise the temperature of 30.0 g of aluminum from 22°C to 80°C, if the specific heat of aluminum is 0.90 J/g°C.
Help needed ASAP, I will mark your answer as brainly.
Give reasons why an element can be broken down...pls explain widely
Los átomos que no poseen _______________ son conocidos como _________________ ________________. Los átomos que poseen carga se denominan ________________, aquellos con carga positiva de llaman_________________ y son aquellos que _________ electrones. Los__________________ son aquellos con carga negativa y son los que ______________ electrones. Para todos los casos el valor de ______ y _________ permanecen iguales y son los que sacamos de la tabla periódica.
Answer:
La respuesta está en la explicación
Explanation:
Los átomos que no poseen ___CARGA____ son conocidos como ____ÁTOMOS____ ____NEUTROS_____. Los átomos que poseen carga se denominan ___IONES____, aquellos con carga positiva de llaman ____PROTONES____ y son aquellos que __PIERDEN__ electrones. Los ______ANIONES____ son aquellos con carga negativa y son los que _____GANAN___ electrones. Para todos los casos el valor de _MASA__ y _NÚMERO ATÓMICO_ permanecen iguales y son los que sacamos de la tabla periódica.
How does renal regulation at the kidneys work in removing acid and restoring equilibrium
Answer: The kidneys help maintain the acid–base balance by excreting hydrogen ions into the urine and reabsorbing bicarbonate from the urine.
Explanation:
How many liters of hydrogen are obtained from the reaction of 4.00 g sodium with excess water, at STP?
Answer:
V = 1.95 L.
Explanation:
Hell there!
In this case, according to the following reaction between sodium metal and water:
[tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex]
We can realize that the moles of hydrogen can be calculated by using the initial mass of sodium, its atomic mass (23.0 g/mol) and the 2:1 mole ratio of sodium to hydrogen to obtain:
[tex]4.00gNa*\frac{1molNa}{23.0gNa} *\frac{1molH_2}{2molNa}=0.0870molH_2[/tex]
Finally, we calculate the volume of hydrogen by using the ideal gas equation whereas the pressure is 1 atm and the temperature 273.15 K according to the STP conditions:
[tex]PV=nRT\\\\V=\frac{nRT}{P}\\\\V=\frac{0.0870mol*0.08206\frac{atm*L}{mol*K}*273.15 K}{1 atm}\\\\V=1.95L[/tex]
Regards!
(Quick pls!! Just the answer, no links) Which scenario is an example of a scientific way of thinking?
A. A researcher reviews images of lunar eclipses taken by
professional photographers and then ranks them in order of which
are the most beautiful
B. A researcher writes to a government representative to convince
the representative to encourage public participation in eclipse
watching
C. A researcher analyzes data on the motions of the Moon and Earth
and then makes a prediction about when the next lunar eclipse will
ocour
D. A researcher reade several different articles on the beat way to
enjoy a lunar eclipse and then decides which method is beat
Explanation:
The right answer is C
Hope i could be helpful
What can we do to protect our oceans ?
Both Arrhenius and Bronsted-Lowry defintions of an acid are similar. According to both of these definitions, an acid is a compound that -
donates a pair of electrons
contains a nonmetal anion
donates a hydrogen ion
should be labeled as corrosive
Answer:Donates a hydrogen ion
Explanation: