Answer:
Organisms can be classified into one of three domains based on differences in the sequences of nucleotides in the cell's ribosomal RNAs (rRNA), the cell's membrane lipid structure, and its sensitivity to antibiotics. 3. The three domains are the Archaea, the Bacteria, and the Eukarya.
Explanation:
An apple, potato, and onion all taste the same if you eat them with your nose plugged
true or false
i know the answer do you?
Answer:
Ummm it would just be indistinguishable ..and i don’t think u well taste when u plug your nose so ldk but ig it is true let me know if am wrong
Explanation:
Typhoons are large storms that form over the Pacific Ocean Hurricanes are large storms that form over the Atlantic Ocean. Which of the following are essential components in the formation of a hurricane
or a lyphoon
A High pressure, high temperature, cyclonic winds, dry air
B. High pressure cool temperature, strong winds, humid air
cWarm front, clouds, low pressure, high slevation
D Low pressure, warm temperature, warm ocean waters, spiraling winds
What are the characteristics for mechanical waves
Physical and chemical changes and properties are observed and tested in order to confirm the identity of a substance or how a substance may act in certain condition. The image below is a rock that, based on its bright yellow color, scientists believe to be sulfur. However, they would like to use a test to confirm this prediction.
Which procedure would you recommend the scientists use?
(A) Use volume displacement and the mass of the rock to calculate density.
(B) Measure volume in centimeters cubed and add to mass to determine density.
(C) Find the weight and volume of the rock then multiply to calculate density.
(D) Dissolve the rock in water, then find the mass and volume needed to calculate density.
Answer:
(A) Use volume displacement and the mass of the rock to calculate density.
Explanation:
1. Suppose that there were two isotopes of Sodium.
28% of the naturally occurring sodium atoms had a
mass of 22, and 72% atoms had a mass of 23. What
would the average atomic weight of sodium be?
Answer: C. The university surveys 600 randomly selected students who attend the university. Correct
Explanation:
22.72 is the average atomic weight of sodium.
What are isotopes?Isotopes are different versions of a specific element.
1st isotopes of 22u = 28%
2nd isotopes of 23u = 72%
The average atomic weight of sodium be=
22 x 28 + 23 x72
=2272/100
=22.72
Hence, 22.72 is the average atomic weight of sodium.
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describe the transfer of energy the occurs as water freezes
Answer:
FREEZING When liquid water freezes, it releases thermal energy and turns into the solid state, ice. Vaporation when water reaches its boiling point of 100ºC, water molecules are moving so fast that they break free of the attractions that hold them together in the liquid state.
Explanation:
There is a law called conservation of energy which states that energy can neither be created nor be destroyed. It can be only transferred from one form to another form. Therefore, thermal energy is released during freezing of water.
What is energy transfer in thermodynamics?Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.
Heat energy can be transferred by three ways conduction, convention and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. When liquid water freezes, it releases thermal energy and turns into the solid state, ice.
Therefore, thermal energy is released during freezing of water.
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Under which conditions of temperature and pressure would a 1-liter sample of a real gas behave most like an ideal gas
Answer:
high temperature and low pressure
Explanation:
An ideal gas is a type of gas which obeys the gas laws at all conditions of pressure and temperature. Whereas a real gas does not obey the gas laws and does not behave according to the kinetic molecular theory.
But a real gas almost behaves like an ideal gas and follow the kinetic molecular theory at a sufficiently high temperature ad low pressure.
You are asked to get a compound that has a low melting point and cannot
conduct electricity, which would you pick if you saw three bottles labeled as Lici,
NaBr, and BrF. What type of bond did you get? *
Answer:
the third
Explanation:
List the two thing that will weaken and eventually kill hurricanes
A)
B)
Answer:
A. when winds are to strong
B. cool tempatures
Explanation:
PLEASE ILL GIVE YOU BRAINLY
What prevents charge buildup in a galvanic cell?
A. An electrolyte
B. A salt bridge
C. An electrode
D. A battery
Answer:
B is the answer
Explanation:
A salt bridge is necessary to keep the charge flowing through the cell. Without a salt bridge, the electrons produced at the anode would build up at the cathode and the reaction would stop running.
Hint: The half life of an element is the amount of time it takes for half of that element sample to decay into a different
element
Based on the graph of radioactive decay for Co-60, how many years does it take for a 10 gram sample of Co-60 to decay into a 125
gram sample?
-0.)
A)
3 years
B)
5.27 years
15.8 years
D)
3 half lives
^ $* ENG
Answer:
Concept: Half-life
Just a general tip, learn to format your question and fix any grammatical issues. Post the question as a picture instead next time, because the copy and pasting clearly failed for you. I'm assuming you mean 1.25 grams.So it would take 3 yearsHow did humans create cow breeds that survive well in cold weather?
Select one:
O
They identified cows that did well in cold weather and mated them.
O
They mated cows with sheep that had very thick wool.
O
They mated cows with caribou that tolerated the cold well.
O
They identified cows that did well in hot weather and mated them
Answer: They identified cows that did well in cold weather and mated them. This is known as selective breeding. All the other answers either cannot work as cross-species breeds generally don't work, or they target cows that survive well in hot weather.
Food undergoes both physical and chemical changes during digestion. Which parts of the digestive process listed below is a physical change that takes place in the mouth?
Answer:
To answer your question use the code ICE on here to get your answer works every time for me hope this helps
c) Ammonia is added to copper sulphate solution till excess?
As ice cream melts, the particles in it will _____ which causes it to ____ thermal energy.
a. Speed up, lose
b. Speed up, gain
c. Slow down, lose
d. Slow down gain
There isn't a subject for science so I put it as chemistry
Answer:
b. speed up, gain
Explanation:
which is equal to a tempature of 20 c. 20 F. 68F. 36F. 32F
Answer:
68F
Explanation:
What is a control group?
Answer:
A control group is someone who takes control over something so a tyrant or a dictator.
Explanation:
If this isnt what your looking for let me know, there wasnt alot of context.
Answer: a group that helps you control something
Explanation: like a surport group but for addictions maybe
A 20 N object is placed on a surface and starts to slide. What is the MOST likely reason the object begins to move?
A O Gravity exerts a balanced force on the object.
В.
Friction is applied to the object.
c. An unbalanced force causes acceleration.
D
The forces acting on the object are in equilibrium.
Answer:
c.
Explanation:
If the object starts to slide it must be on a slope.
There are 2 forces acting on the object - gravity and the friction between the object and the surface.
If sliding starts then the forces must be unbalanced.
The force of gravity is greater than the friction.
Answer:c
Explanation:
What is the composition of the most common mineral compounds that make up Earth's crust and mantle? 1 silicon, oxygen, and one or more metal elements 2 sulfates, oxygen, and one or more nonmetal elements 3 carbonates, hydrogen, and one or more organic compounds 4 oxalates, oxygen, and one or more organic compounds
Answer:
(1) silicon, oxygen, and one or more metal elements
Explanation:
The earth's Crust is mainly composed of
Oxygen, Silicon, Aluminum, Iron, Calcium, Potassium, Sodium and Magnesium. 90% of the earth's Crust is composed of Silicates.
The earths Mantle is almost completely Silicate, oxygen and magnesium.
Which of the following correctly compares glass A and glass B?
A black line splitting the image into two parts. On the left hand side is glass A that is almost full. On the right side is glass B that is half full.
Question 13 options:
Glass A has the same mass as glass B.
Glass A has a greater mass than glass B.
Glass A has the same amount of liquid as glass B.
The liquid in both glasses takes up the same space.
Answer:
Glass A has a greater mass than glass B
Answer:
Glass A has a greater mass than Glass B
hope this helped :>
C3H5OH + 3 O2 --> CO2 + H2O When balancing the equation above, how many molecules of CO2 and H2O are produced? The first half is already balanced.
Answer:
1.8069*10²⁴molecules of CO₂ and H₂O are produced.
Explanation:
C₃H₅OH + O₂ → CO₂ + H₂O
The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.
Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts
Left side: 3 C, 6 H and 3 O.
Right side: 1 C, 2 H and 3 O.
The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.
By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.
So, balancing the C:
C₃H₅OH + O₂ → 3 CO₂ + H₂O
Then:
Left side: 3 C, 6 H and 3 O.
Right side: 3 C, 2 H and 7 O.
Now, balancing the H:
C₃H₅OH + O₂ → 3 CO₂ + 3 H₂O
Then:
Left side: 3 C, 6 H and 3 O.
Right side: 3 C, 6 H and 9 O.
Finally, balancing the O:
C₃H₅OH + 4 O₂ → 3 CO₂ + 3 H₂O
Then:
Left side: 3 C, 6 H and 9 O.
Right side: 3 C, 6 H and 9 O.
Since you have the same amount of each element on each side of the reaction, the reaction is balanced. Then 3 moles of CO₂ and 3 moles of H₂O are produced.
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and it applies to any substance.
Then the following rule of three applies: if 1 mole contains 6.023*10²³ molecules, then 3 moles of CO₂ or 3 moles of H₂O, how many molecules does it contain?
[tex]amount of molecules=\frac{3 moles* 6.023*10^{23} molecules}{1 mole}[/tex]
amount of molecules= 1.8069*10²⁴
1.8069*10²⁴ molecules of CO₂ and H₂O are produced.
Aides in the burning of materials. Needed for humans to breathe.
Answer:
Oxygen.
Explanation:
Oxygen is a chemical element that aides in the burning of materials and it is needed for humans to breathe.
Cellular respiration can be defined as a series of metabolic reactions that typically occur in cells so as to produce energy in the form of adenosine triphosphate (ATP). During cellular respiration, high energy intermediates are created that can then be oxidized to make adenosine triphosphate (ATP). Therefore, the intermediary products are produced at the glycolysis and citric acid cycle stage through the breathing of oxygen used to obtain energy from the food ingested.
Hence, all cells in living organisms require oxygen and glucose to release energy.
how does the immune system uses feedback mechanisms?
Answer:The main job of the innate immune system is to fight harmful substances and germs that enter the body, for instance through the skin or digestive system. The adaptive (specific) immune system makes antibodies and uses them to specifically fight certain germs that the body has previously come into contact with.
What is the value for AG at 100 Kif AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?
A. AG = 2700 kJ/mol
B. AG = -36 kJ/mol
C. AG = 0 kJ/mol
D. AG = 18 kJ/mol
Answer:
ΔG = 18KJ/mol
Explanation:
Given data:
ΔG = ?
ΔS = 0.09 Kj/mol.K
ΔH = 27 KJ/mol
Temperature = 100 K
Solution:
Formula:
ΔG = ΔH - TΔS
ΔS = entropy
ΔH = enthalpy
by putting values,
ΔG = 27 KJ/mol - 100K(0.09 Kj/mol.K)
ΔG = 27 KJ/mol - 9 KJ/mol
ΔG = 18KJ/mol
why sodium and chlorine are active element
Scientists use the chemical and physical properties of matter to differentiate substances. Which of the following is a chemical property?
(A) A starch sample turns blue when introduced to iodine
(B) Gold's property of malleability allow it to be shaped into a ring.
(C) Salts exhibit electrical conductivity.
(D) A metal is identified by its density.
Answer:
a.) A starch sample turns blue when introduced to iodine
Explanation:
A is a chemical change whereas the other answers would be physical changes.
The chemical property has been the turning of the iodine blue with starch introduction. Thus, option A is correct.
The substance properties can be differentiated as Physical properties and chemical properties. Physical properties can be defined as the properties that do not lead to the change in the chemical composition of the compound, For example, electrical conductivity, malleability, density, etc.
The properties of the compound that have been led to the change in the chemical composition of the compound have been termed chemical properties. For example. burning, reduction, etc.
Since the starch sample has been reacted with iodine there has been a chemical change that leads to the product of blue color. Thus, the starch turning iodine blue has been the chemical property. Thus, option A is correct.
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How are ocean waves different from sound waves?
a. ocean waves are longitudinal waves, sound waves are transverse waves
b. ocean waves are electromagnetic waves, sound waves are mechanical waves
c. ocean waves are mechanical waves, sound waves are electromagnetic waves
d. ocean waves are transverse waves, sound waves are longitudinal waves
Answer:
C
Explanation:
Ocean waves are something we can see. We cannot see Sound waves.
Answer:
the correct answer is B
Explanation:
Sound waves are longitudinal waves.
*
What part does uplift play in the rock cycle?
A. It pulls rocks deep into Earth.
B. It pushes rocks up towards Earth's surface.
C. It breaks rocks into sediment.
D.It decreases pressure on buried rocks.
Answer:
Sometimes forces act to pull sections of the Earth's crust apart. At other times they are forced together. All this movement can cause rocks that were once underground to be brought up to the Earth's surface. This process is called uplift.
Explanation:
Hope this helped you out have a good day
(Pls help i will give brainlyest) Label the missing parts of the diagram.
Answer:
Sedimentary rock
Metamorphic rock Igneous rock
Question 2 (1 point)
Which state of matter has the lowest density and the highest energy?