Answer:
Newton's second law of motion describes the relationship between an object's mass and the amount of force needed to accelerate it.
Explanation:
What is ground state? What is excited state?
Answer:
A ground-state atom is an atom in which the total energy of the electrons can not be lowered by transferring one or more electrons to different orbitals.
A excited state is any of the energy levels of a physical system, especially an atom, molecule, etc., that has higher energy than the lowest energy level.
Answer:
Ground state is the lowest possible energy state an atom can have. Excited state is an energy level that is higher than ground state. :)
HELP ASAP!!
Two colorless chemicals combine inside a glow
stick. When the chemicals combine, they produce
brightly colored light. The glow stick's temperature
does not change. (select all that apply)
emission of heat
emission of light
color change
formation of ga
Answer:
Emission of light
color change:)
Explanation:
Answer:
B and C
Explanation:
edge 2021
I just did it
Which of the following reactions is balanced?
A. caC12 + H2C03 2CaC03 + HCI
B. caC12 + caC03 + 2HCl
C. caC12 + 2H2C03 caC03 + HCI
D. 2caC12 + H2C03 cac03 + HCI
Answer:
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HC
Explanation:
A balanced reaction has the same number of atoms in the both sides of the reaction. In the options:
A. CaCl₂ + H₂CO₃ → 2CaCO₃ + HCI
In this reaction there is 1 Ca in reactants and 2 in products -The reaction is unbalanced-
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HCl
There is 1 Ca is both sides, 2Cl, 2H, 1C and 3 Oxygens -The reaction is balanced
C. CaCl₂ + 2H₂CO₃ → CaCO₃ + HCI
There is 1 Ca in both sides but 2Cl in reactants and 1 in Cl -The reaction is unbalanced-
D. 2CaCl₂ + H₂CO₃ →CaCO₃ + HCI
There are 2 Ca in reactants and 1 in Ca -The reaction is unbalanced-
7 Ba(ClO3)2
How many oxygen atoms are shown?
Can someone tell me a summary about the electromagnetic spectrum
Answer:
Explanation:
it assigns a color for various temps, frequencies, and wave lengths. basically if you have a temprature of something you can use the electromagnetic spectrum to find the color of the object, the frequencies, and wave lengths, etc.
16.
Which of the following elements is a metalloid?
a. As
c. Br
b. Se
d. Kr
Answer:
a. As
Explanation:
AlBr3 reacts with Fe(NO3)2. Which of these is a likely product of this reaction?
Answer:
FeBr2
it is what it is indeed
If an 85.0 mL container of helium gas at standard pressure is heated from 20 C to 91 C and the pressure is increased to 2.8 atm then what would the new volume be for the He gas?
Answer:
V₂ = 37.71 mL
Explanation:
Given data:
Initial volume = 85.0 mL
Initial pressure = 1 atm
Initial temperature = 20°C (20 +273 = 293 K)
Final temperature = 91°C (91+273 = 364 K)
Final volume = ?
Final pressure = 2.8 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 = 1 atm× 85.0 mL × 364 K / 293 K × 2.8 atm
V₂ = 30940 atm.mL.K / 820.4 K.atm
V₂ = 37.71 mL
Earthquakes can happen at which type of plate boundaries? (Select ALL that apply)
A. Divergent
B. Convergent
C. Transform
Answer:
convergent plates
Explanation:
Answer:
Transform.
Explanation:
How does sexual reproduction increase the variance of traits in a population?
Answer:
Sexual reproduction promotes genetic variation by producing different gene combinations.
Which of the following best describes
electromagnetic waves?
A. Electromagnetic waves require the presence of a
medium to be able to transfer energy.
B. Electromagnetic waves can transfer energy through
empty space.
C. Electromagnetic waves can only transfer energy though
water.
Answer:
B.
Electromagnetic waves do not require any type of media.
The correct statement is " Electromagnetic waves can transfer energy through".
What is electromagnetic wave?Electromagnetic waves are synchronized vibrations of electric along with magnetic fields that travel across a vacuum at the speed of light. The oscillations of the two fields generate a transverse wave since they are perpendicular to each other and to the direction of energy as well as wave propagation.
What is energy ?The capacity to work is defined as energy. It can take the form of potential energy, kinetic energy, thermal energy, electrical energy, chemical energy, nuclear energy, or any other form.
Therefore, the statement "Electromagnetic waves can transfer energy through" will best describe electromagnetic waves.
Hence, the correct answer will be option (b).
To know more about energy and electromagnetic waves.
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What volume of oxygen (02) gas is equal to 49.5 g 02 gas at STP?
Answer:
The volume of two moles of oxygen at STP is
Assuming that the gas is at standard temperature and pressure (STP), one mole of any gas occupies 22.4 L . This means the number of moles of O2 is 222.4=0.089 mol .
Explanation:
What elements are in water?
1. Hydrogen and Helium
2. Hydrogen and Oxygen
3. Helium and Oxygen
4. Hydrogen and Nitrogen
Answer:
Hydrogen and Oxygen
Explanation:
The chemical equation for water is H20, meaning Hydrogen and 2 oxygen!
how many atoms are in sodium hydroxide
Answer:6 atoms
Explanation:Each NaOH has one Na and one O and one H. Therefore, 2 NaOH has 6 atoms.
Answer:
Three atoms
Explanation:
Hope this helps
In a DNA molecule, the adenine always pairs with the
Answer:
Adenine always pairs with thymine in a DNAmolecule.
Explanation:
PLEASE HELP I NEED TO FINISH IT PLEASEEEEE
Answer:
heat flows from hot to cold
Explanation:
when heat flows from hot to cold, the cold can form cold to warm and the cycle start again
An object at rest has equal forces acting on it. This can be described as a __________ force.
A_______ contains specific instructions for making proteins
A- CHROMOSOMES
B- GENE
C- MOLECULES
D- RIBOSOMES
Answer:
D Ribosomes
Explanation:
Answer:
D. Ribosomes
2 points
If an element has 20 protons, 20 electrons and 20 neutrons, what is the
atomic number of this element?
Answer:
20
Explanation:
The atomic number of this element is 20.
Atomic number is the number of protons within an atom.
Since we have been given that the number of protons is 20. Therefore, the atomic number is 20.
Mass number of the atom is the number of protons plus the number of neutrons.
For this atom, mass number = 20 + 20 = 40
Atomic number is 20
During photosynthesis the chemical bonds between are broken
Answer:
yes they are broken down into smaller units
what is the pOH of a solution if the concentration of hydronium ionsis 8.9x10-9
pOH of a solution = 5.95
Further explanationGiven
The concentration of hydronium ions : 8.9 x 10⁻⁹
Required
pOH
Solution
pOH = - log[OH]
[H₃O⁺]= 8.9 x 10⁻⁹
pH = - log[H₃O⁺]
pH = 9 - log 8.9
pH = 8.05
pH + pOH = 14
pOH = 14-pH
pOH= 14-8.05
pOH = 5.95
what is the boiling point of a solution of 0.150mole Al(No3)3 in 0.500kg water. kb= 0.512
The boiling point of a solution : 100.1536 °C
Further explanationGiven
0.150 mole Al(NO₃)₃ in 0.500 kg water. kb= 0.512
Required
The boiling point
Solution
Colligative properties
ΔTb = Kb . m
m = molality = mol solute per kg solvent
m = 0.15 moles : 0.5 kg
m = 0.3
ΔTb = 0.512 x 0.3
ΔTb = 0.1536
ΔTb = Tb solution - Tb solvent (solvent=water, boiling point = 100 °C)
0.1536 = Tb solution - 100
Tb solution = 100.1536 °C
PET plastic # 1 is used in water bottles and pop bottles. Why should they be recycled but not be reused?
They should be recycled but not reused because the "repeated use increases the risk of leaching and bacterial growth." Also, recycling PET plastic "results in reduced energy consumption, lower cost, and reduced environmental impact."
Which family of elements is listed in order of increasing atomic radius?
a. O, S, Se, Te
b. Na, Mg, Al, Si
c. Sr, Y, Sr, Rb
d. I, Br, Cl, F
e. C, N, O, F
will give brainiest for correct please hurry though
Answer:
i think its answer B.....
PLZ HELP THIS IS DUE RN!!!!!! NO ONE IS HELPING ME :(
You hold a 50N bowling ball above your head for 15 minutes. How much work have you done? Why?
9. You run the 100 M race in 15 seconds and your identical twin runs it in 14s. Who did more work? Why?
Answer:
Eght: 0
Explanation:
The work formula is W = F*d where d is displacement (which means the direction matters)
Same amount of work.
Eight
Time does not matter in Work. Force and Distance do.
F = 50 N
s = 0 The only work you have done is move the ball above your head. Thereafter you just held it.
t = 15 but no work is done. Tell your tired muscles that as they try and deal with holding a 5 kg mass above you head.
W = 0
Nine
Again from the last question you should be able to tell that time does not matter. The force is the same for both of you (that's why he's your identical twin).
So the work is the same. You both weigh the same. You both went the same distance.
8
I need help with this question
What does the hydrosphere include?
Glaciers
Groundwater
Lava
Polar Ice
The hydrosphere include glaciers, groundwater, and polar ice. That is option A, B and C.
What is hydrosphere?Hydrosphere is defined as the part of the earth that is made up of water which includes the surface of the planet, underground, and in the air.
The water found in the hydrosphere of earth moves in cycles in such a way that non is lost.
The components of the hydrosphere include the following:
oceans, Polar ice,freshwater,surface water, groundwater, glacial water, and atmospheric water vapour.The polar ice is part of the hydrosphere because it is the frozen part of the earth's hydrosphere.
The lava is not part of the hydrosphere but part of lithosphere and it's released when volcanic eruptions occurs.
Therefore is can be concluded that glaciers, groundwater, and polar ice are parts of the hydrosphere while the lava is not part of the hydrosphere.
Learn more about hydrosphere here:
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Pllllllsssssssssss helpppp Determine the Mass Number of the Following Elements:
Al - 13 Protons 15 Neutrons
B - 5 Protons 6 Neutrons
C - 6 Protons 8 Neutrons
Sc - 21 Protons 25 Neutrons
Na - 11 Protons 13 Neutrons
When studying seismological data scientists use data from...
I do not understand science but if u ask me I would have no clue do u get what I mean
The image below shows how warm and cool
air moves over Earth
What is this type of air movement called?
A. convection current
B. atmospheric current
C. horizontal air current
D. prevailing surface winds
Answer:
convection current
Explanation:
