The statement that "Newton knew what gravity did but he could not explain why gravity did it is the basic difference between?
A. A scientific law and a scientific theory
B. A scientific theory and a societal law
C. A scientific law and societal law
D. A hypothesis and scientific law
Answers
B. A scientific theory and a societal law
Newton's law states that:
Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.Newton could not explain:
Newton could describe gravity, but he didn't know how it worked. In Principia, Newton described gravity as an ever-present force, a tug that all objects exert on nearby objects. The more mass an object has, the stronger its tug. Increasing the distance between two objects weakens the attraction.Thus, correct option is B i.e. the difference between a scientific and societal law.
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A sample of oxygen gas has a volume of 150 mL when its pressure is 0.587 atm at 155 K. If the pressure and temperature are increased to STP, what will the new gas volume be?
Answers
Answer:
V₂ = 155.17 mL
Explanation:
Given data:
Initial volume = 150 mL
Initial pressure = 0.587 atm
Initial temperature = 155 K
Final temperature = 273.15 K
Final volume = ?
Final pressure = 1 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 0.587 atm × 150 mL × 273.15 K / 155 K × 1 atm
V₂ = 24050.86 atm .mL. K / 155 K.atm
V₂ = 155.17 mL
Which statement best describes the relationship between photosynthesis and cellular respiration?
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
Photosynthesis is part of the carbon cycle, and cellular respiration is not.
Only plants perform photosynthesis, and only animals perform cellular respiration.
Photosynthesis releases carbon into the atmosphere, and cellular respiration removes carbon from the atmosphere.
Answers
Answer:
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
Explanation:
The first option clearly expresses the relationship between photosynthesis and cellular respiration.
Cellular respiration releases carbon back into the atmosphere whereas photosynthesis removes the carbon from the atmosphere.
Photosynthesis is the process whereby green plants manufacture their food using carbon dioxide and water.
In cellular respiration, the product of the photosynthesis is used by organisms to produce energy.
guys please finnish thiissss
Answers
Answer:
1. H2O
2. Ba(OH)2
3. H2O
4. H2O
5. Ca(OH)2
6. H2O
Explanation:
Answer:
1. H2O
2. Ba(OH)2
3. H2O
4. H2O
5. Ca(OH)2
6. H2O
Explanation:
Hope this helps
What is the empirical formula for C10h22
Answers
The empirical formula is
C5H11
Explanation:
We have decane, the alkane with a chemical formula of
C10H22
.
The empirical formula of a substance has the smallest ratio between the elements its composed of.
Here, we got the carbon to hydrogen ratio as
10:22
. So, we need to find the greatest common factor between the two numbers.
10=2*5
22=2*11
As you can see here, the greatest common factor between the two numbers is
2
, and so we divide both numbers by
2
.
10/2=5
22/2=11
And so, the new formula becomes
C5H11
GIVING BRAINLIST TO BEST ANSWER! How does Bohr’s model of the atom compare with Thomson’s model?
A) They both describe atoms as small, indivisible spheres.
B) They both describe electrons as moving around the nucleus.
D) They both describe electrons as being surrounded by the positive matter.
C) They both describe atoms as being made up of positive and negative matter.
Answers
Answer:I say C .. u should give the other person Brainliest bc they had a fully answer!
Explanation:
Answer:
d on brainly
Explanation:
i just took the exam
how molecules react to an increase in temperature.
Answers
Answer:
An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure. 17.5 “Temperature and Reaction Rate”).
Explanation:
HELP PLEASE!!!!!!
“Andy was drawing
of his circuit. When
asked to explain it,
he said, “This is an
example of a
perpendicular
circuit. The light on
the left will be
brighter because
there is less wire."
Is he correct?”
Answers
I don’t know this and I need help help me
Answers
A. Neutrons and electrons
B. Protons and electrons
C. Electrons in energy levels
D. Protons and neutrons
Answers
Answer:
D.
Explanation:
Because protons and neutrons make up the mass of an atom.
what is a good way to define lunar
Answers
How many moles in 13 grams of C 2 H6 ? show work
Answers
Answer:
0.43mole
Explanation:
Given parameters:
Mass of C₂H₆ = 13g
Unknown:
Number of moles = ?
Solution:
To solve this problem we need to first find the molar mass of the given compound.
Molar mass of C₂H₆ = 2(12) + 6(1) = 30g/mol
So;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Number of moles = [tex]\frac{13}{30}[/tex] = 0.43mole
plss help . i have no idea
Answers
Answer:
Protons and Neutrons have approximately the same mass.
Equal numbers of protons and electrons make an atom neutral.
Protons have a positive charge
Explanation:
Protons and Neutrons have approximately the same mass. - both are 1 amu
Equal numbers of protons and electrons make an atom neutral. - protons are +1 and electrons are -1, so they cancel each other if there are equal amounts.
Protons have a positive charge - this is true.
which of the following is true of climate but not of weather
A. Independent of regional temperatures.
B. Not useful for making future predictions
C. Determined by precipitation patterns collected over many years
D. Calculated from a variety of data, including wind speed and direction and cloud cover
Answers
Answer:
C. Determined by precipitation patterns collected over many yearsWhat are the answers??
Answers
The percent composition :
Al : 15.79%
S : 28.07%
O : 56.14%
Further explanationGiven
Aluminum, Oxygen, and Sulfur in Al₂(SO₄)₃ compound
Required
The percent composition
Solution
Molar mass of Al : 27 g/mol
Molar mass of O : 16 g/mol
Molar mass of S : 32 g/mol
Molar mass of Al₂(SO₄)₃ : 342 g/mol
% Al = 2.MM Al / MM Al₂(SO₄)₃ x 100%=2.27/342 x 100%=15.79%
% S = 3. MM S / MM Al₂(SO₄)₃ x 100%= 3.32/342 x 100%=28.07%
% O = 12.MM O / MM Al₂(SO₄)₃ x 100%= 12.16/342 x 100%=56.14%
Which of the following empirical formulas is written correctly? *
Answers
*
How do you identify forces in a diagram
sun
arrow
moon
O
Mars
Answers
What is the molality of a solution made by dissolving 2 moles of NaOH in 6 kg
of water?
A. 0.33 mol/kg
B. 12 mol/kg
C. 3 mol/kg
D. 2 mol/kg
Answers
The molality of a solution : m = 0.33 mol/kg
Further explanationGiven
2 moles of NaOH in 6 kg of water
Required
The molality
Solution
Molality shows how many moles are dissolved in every 1000 grams of solvent.
m = n x (1000/p)
m = Molality
n = number of moles of solute
p = solvent mass (grams)
Input the value :
solute : NaOH
solvent : water
m = 2 moles : 6 kg
m = 0.33 mol/kg
What are the three eras in the geologic time scale? *
Answers
the Mesozoic
the Cenozoic
DENSITY CHEMISTRY WORD PROB I WILL MARK BRAINLIEST PLEASE HELP I NEED ASAP
Answers
Answer:
The number of passengers that the Embraer E170 could carry if its fuselage was made of steel is 39 passengers
Explanation:
The given parameters of the cylinder representing the fuselage are;
The length of the cylinder, l = 30.0 meters
The width of the cylinder, w = 2.5 meters
The thickness of the cylinder, t = 2.5 mm = 0.0025 meters
The volume of the metal required to make the fuselage cylinder, V = (π·w²/4 - π·(w - 2·t)²/4) × l
Therefore, by substituting the known values, we have;
V = (π × 2.5²/4 - π×(2.5 - 2×0.0025)²/4) × 30 = 0.58845957392
The volume of the metal required to make the fuselage cylinder, V≈ 0.58846m³
The given density of steel = 7.87 g/cm³ = 7870 kg/m³
The given density of aluminum = 2.70 g/cm³ = 2,700 kg/m³
Mass = Density × Volume
The mass of the fuselage made with steel = The given density of steel × The volume of the metal required to make the fuselage cylinder
∴ The mass of the fuselage made with steel = 7870 × 0.58846 ≈ 4631.18
The mass of the fuselage made with steel ≈ 4631.18 kg
Similarly, the mass of the fuselage made with aluminum = 2,700 × 0.58846 ≈ 1588.84
The mass of the fuselage made with aluminum ≈ 1588.84 kg
The total mass the Embraer E170 could carry = The mass of the fuselage made with aluminum + The mass of the 78 passengers
The average mass of each passenger = 79 kg
∴ The total mass the Embraer E170 could carry ≈ 1588.84 + 78 × 79 = 7750.84
The total mass the Embraer E170 could carry ≈ 7750.84 kg
The extra mass the Embraer E170 could carry when made of steel = (The total mass the Embraer E170 can carry) - (The mass of the fuselage made with steel)
∴ The extra mass the Embraer E170 could carry when made of steel = 7750.84 - 4631.18 = 3119.36
The extra mass the Embraer E170 could carry when made of steel ≈ 3119.36 kg
The number of passengers the Embraer E170 could carry when made of steel = (The extra mass the Embraer E170 could carry when made of steel)/(The average mass of one passenger)
∴ The number of passengers the Embraer E170 could carry if its fuselage was made of steel = 3119.36 kg/(79 kg/passenger) ≈ 39.489 passengers
The number of passengers that the Embraer E170 could carry if its fuselage was made of steel ≈ 39 passengers (we round down when counting people which are whole quantities)
Which of the following reactions is irreversible?
A. Zinc (Zn) reacting with hydrochloric acid (HCl)
B. Haber Process
C. Dehydrating copper sulfate (CuSO4)
D. Thermal decomposition of NH4Cl
PLEASE HELP
Answers
Answer:
A. Zinc (Zn) reacting with hydrochloric acid (HCl)
Explanation:
The reaction of Zinc with hydrochloric acid is an irreversible chemical process.
What makes a reaction reversible;
it must be involved in reversible chemical processes, no matter how small the extent of the reversibility. the rate of forward reaction must be equal to the backward one.So, hydrochloric acid when reacting with Zinc will give a complete chemical change that will go into completion.
Answer:
(A): Zinc (Zn) reacting with hydrochloric acid (HCI)
Explanation:
I got it right on founders edtell
PLS HELP!!!!! WILL GIVE BRAINLIEST, 5 STARS, AND THANKS!!!!!!!!!!
Which reactions are the reverse of one another?
condensation and addition
addition and elimination
elimination and condensation
substitution and addition
Answers
Answer:
it has to be b
Explanation:
the other ones don't make any sense
A very loud sound has a high _____.
resting point
amplitude
wavelength
bass
Answers
Answer:
Resting Point
Explanation:
Answer: amplitude
Explanation:
Energy stored in an object because of position or condition is called ___________ energy.
Answers
Answer:
Potential energy
Seawater is an example of a _______ solution
a Liquid in gas
b Gas in liquid
C Solid in liquid
d Liquid in liquid
Answers
Answer:
C. Solid in liquid
Explanation:
Seawater is an example of a solid in liquid solution.
Sea water is made up of:
water mineral salts dissolved gasesA liquid solution is always made up of a solute being dispersed within the solvent medium.
The solvent is the liquid or fluid medium.
Such solutions are homogeneous because the solute particles are distributed evenly or uniformly in the solvent.
The solute is usually present in smaller amount compared to the solvent.
What is the molar mass of KNO3?
Answers
Answer:
K=39, N=14, O=16. So molar mass of KNO3= 39+14+3(16)= 101
Im Wrong?
Please help, How would you define what a chemical reaction and an equation is? Give an example.How would you know if a chemical reaction is balanced? Give an example.
Answers
Answer:
A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.
Explanation:
In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia.
Please help me!!! 12 points :)
Answers
Osmium metal, the densest element, has a density of 22.6 g/mL, while hydrogen, the least dense element, has a density of 8.99 e-5 g/mL. Calculate the volume occupied by 1.00 g of each element. How many times more dense is osmium than hydrogen?
Answers
Answer:
1. Volume of osmium = 0.044 mL
2. Volume of Hydrogen = 11123.47 mL
3. Osmium is 251390 times denser than hydrogen
Explanation:
From the question given above, the following data were obtained:
Density of osmium = 22.6 g/mL
Density of Hydrogen = 8.99×10¯⁵ g/mL
Mass of osmium = 1 g
Mass of Hydrogen = 1 g
1. Determination of the Volume of osmium.
Density of osmium = 22.6 g/mL
Mass of osmium = 1 g
Volume of osmium =?
Density = mass /volume
22.6 = 1 / volume
Cross multiply
22.6 × volume = 1
Divide both side by 22.6
Volume = 1 / 22.6
Volume of osmium = 0.044 mL
2. Determination of the Volume of Hydrogen.
Density of osmium = 8.99×10¯⁵ g/mL
Mass of osmium = 1 g
Volume of osmium =?
Density = mass /volume
8.99×10¯⁵ = 1 / volume
Cross multiply
8.99×10¯⁵ × volume = 1
Divide both side by 8.99×10¯⁵
Volume = 1 / 8.99×10¯⁵
Volume of Hydrogen = 11123.47 mL
3. Determination of the number of times osmium is denser than hydrogen.
Density of osmium (Dₒ) = 22.6 g/mL
Density of Hydrogen (Dₕ) = 8.99×10¯⁵ g/mL
Dₒ / Dₕ = 22.6 / 8.99×10¯⁵
Dₒ / Dₕ = 251390
Cross multiply
Dₒ = 251390 × Dₕ
Thus, osmium is 251390 times denser than hydrogen.
What does the speed of a sound depend on?
A.
the medium through which it travels
B.
the source from which it is emit
C.
the volume of the sound
D.
the pitch of the sound
Answers
Please ASAP:
According to their energies, atomic orbitals are filled as:
Answers
Answer:
C
Explanation:S has less energy than P, and P has less energy than D and so on.