organized cells:tissues as organ system or organism
Answers
Explanation:
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.
Related Questions
Diffusion in Solids It is desired to calculate the rate of diffusion of CO₂ gas in air through a loosely packed bed of sand at 276K and a total pressure of 1 atm. The bed depth is 1.25 m and the void fraction e is 0.3. The partial pressure of CO₂ at the top of the bed is 2.026 x 10' Pa and 0 Pa at the bottom. Assume equimolar counterdiffusion of CO₂ and air. Use a t of 1.87. DAB-0.142×10 m²/s.
Answers
the rate of diffusion of CO₂ gas in air through the bed of sand is approximately 2.304 × 10^-6 mol/(m²·s).
To calculate the rate of diffusion of CO₂ gas in air through a bed of sand, we can use Fick's law of diffusion:
J = -DAB (dC/dx)
where J is the molar flux of CO₂, DAB is the diffusion coefficient of CO₂ in air, and (dC/dx) is the concentration gradient of CO₂ in the direction of diffusion.
To calculate the concentration gradient, we can use the following equation:
(dC/dx) = (ΔC/Δx)
where ΔC is the difference in partial pressure of CO₂ between the top and bottom of the bed, and Δx is the bed depth.
We are given that the bed depth is 1.25 m and the void fraction is 0.3, which means that the volume of the bed is:
V = (1 - e) A L
where A is the cross-sectional area of the bed and L is the bed depth. Assuming a circular cross-section, we can calculate the area as:
A = π (d/2)²
where d is the diameter of the bed. We are not given the diameter, so we cannot calculate the area.
However, we are given the partial pressure of CO₂ at the top and bottom of the bed, as well as the diffusion coefficient and temperature. We can use these values to calculate the molar flux of CO₂ using Fick's law of diffusion.
First, we need to convert the diffusion coefficient to the appropriate units:
DAB = 0.142 × 10^-9 m²/s
Next, we can calculate the concentration gradient:
ΔC = 2.026 × 10^4 Pa - 0 Pa = 2.026 × 10^4 Pa
Δx = 1.25 m
(dC/dx) = (ΔC/Δx) = (2.026 × 10^4 Pa/1.25 m) = 1.6208 × 10^4 Pa/m
Finally, we can calculate the molar flux of CO₂:
J = -DAB (dC/dx) = -(0.142 × 10^-9 m²/s) (1.6208 × 10^4 Pa/m) = -2.304 × 10^-6 mol/(m²·s)
The negative sign indicates that the molar flux of CO₂ is in the opposite direction of the concentration gradient, which is expected for equimolar counterdiffusion.
Therefore, the rate of diffusion of CO₂ gas in air through the bed of sand is approximately 2.304 × 10^-6 mol/(m²·s).
Where do you find membrane bound organelles?
Answers
Answer:
you would find it in eukaryotic cells
Explanation:
got it right on my test in advanced
Answer:
in Eukaryotic cells bc prokaryotic cells have no membrane organelles
Explanation:
Stationary objects want to stay stationary, because they resist change in motion. this is known as _____.
Answers
Inertia is the tendency of an object to resist changes in its state of motion.
hope this helps!:)
The its motion______ energy of an object is related to both the object's position and it's motion.
O A) kinetic
OB) potential
C) mechanical
Answers
Answer:
mechanical
Explanation:
cause mechanical energy is the sum of potential and kinetic enery
7) How many total atoms are there in 2.21 moles of magnesium bromide?
Answers
Answer:0.0054314469917931 mole using the molecular weight calculator and the molar mass of MgBr2.
Explanation:
Submit the answers to the checkpoint questions in the text box with the Lesson Review.
Part A Checkpoint
Directions: Complete each of the following questions.
(PICTURE FOR THE FIRST QUESTION)
1. Indicate the kind of energy represented in each example below:
a. Burning fuel in a car
b. Exploding an atomic bomb
c. Current moving in a wire
d. Tires sliding on pavement when brakes are applied
e. Football player running for a touchdown
2. All forms of energy except nuclear fission come from the _________.
3. Energy is ______________.
Answers
Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.
The detonation of an atomic bomb releases enormous amounts of thermal energy, or heat, achieving temperatures of several million degrees in the exploding bomb itself. This thermal energy creates a large fireball, the heat of which can ignite ground fires that can incinerate an entire small city.
When the circuit is complete, there is a flow of charge (electric current). The electrons moving through the wire transfer energy to the wire in the form of heat. The particles in the wire, therefore, have more kinetic energy and so the temperature increases.
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Answer:ss
Explanation:ss
calculate the ph of a buffer solution obtained by dissolving 25.0 g kh2po4(s) and 39.0 g na2hpo4(s) in water and then diluting to 1.00 l.
Answers
The pH of a buffer solution obtained by dissolving 25.0 g KH₂PO₄(s) and 39.0 g Na₂HPO₄(s) in water and then diluting to 1.00 L is 7.37
The pKa of the buffer H₂PO₄⁻/HPO₄²⁻ is 7.21. Using the H-H equation, you may determine a buffer's pH:
pH = pKa + log₁₀ [HPO₄²⁻] / [H₂PO₄⁻]
Molar mass of KH2PO4 (25.0 g, 136.086 g/mol) in moles:
moles KH2PO4 =25.0g/136.086g x = 0.1837 = moles [HPO₄²⁻]
Molecular weight of 38.0g of Na2HPO4 (141.96g/mol):
moles Na2HPO4 = moles HPO₄²⁻
moles Na2HPO4 = 38.0g / 141.96g) = 0.2677 moles.
Replacing in H-H equation:
pH = pKa + log₁₀ [HPO₄²⁻] / [H₂PO₄⁻]
pH = 7.21 + log₁₀ [0.2677] / [0.1837]
pH = 7.37
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Need help with this
Answers
Answer:
H20is water andN20is nitrogen 4 oxide
The total number of atoms represented by the formula (NH4)2Cr2O7 is
a. 23
b. 11
c. 19
d. 18
will give branliest for quick and correct answers
Answers
Answer:
its 19 I'm pretty sure about
Answer:
c is correct and my girl friend
which gas would most likely be found in the greatest amount in the bubbles? a) oxygen. b) ozone. c) nitrogen. d) carbon dioxide
Answers
The gas that would most likely be found in the greatest amount in bubbles is nitrogen, option c.
When a liquid undergoes a rapid change in pressure or temperature, bubbles are usually formed due to the presence of dissolved gases. Nitrogen is the most abundant gas available in natural environments such as water, due to its high solubility. Nitrogen is the primary component in Earth's atmosphere, with nearly 78% of it dissolved in water bodies.
Nitrogen is readily drawn out of the solution when you reduce pressure or the water temperature rises, leading to bubbles.
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The gas that would most likely be found in the greatest amount in the bubbles is d) carbon dioxide.
During various natural processes and chemical reactions, gases can be released in the form of bubbles. When considering the options given, the gas that is commonly produced and released in significant amounts is carbon dioxide (CO2). Carbon dioxide is a byproduct of respiration, combustion, and other metabolic activities in living organisms. It is also released during the process of fermentation, photosynthesis, and decomposition of organic matter.
Oxygen (O2) is an essential gas for respiration, but it is typically consumed rather than produced in significant quantities during most natural processes. Ozone (O3) is a less common gas and is typically found in the Earth's ozone layer. Nitrogen (N2) is a major component of the Earth's atmosphere, but it is relatively inert and does not readily form bubbles.
Carbon dioxide, on the other hand, is frequently produced and released in various natural and chemical processes, making it the gas most likely to be found in the greatest amount in bubbles.
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What do all magnets have in common? Select all that apply
magnetic domains are aligned
magnetic domains are not aligned
movement of protons creates a magnetic field
all magnets have opposite poles (a North pole and South pole)
movement of electrons creates a magnetic field
moving electrons generate magnetic fields
Answers
Answer:
1
4
5
6
Explanation:
all magnets have opposite poles (north and south)
magnetic domains are aligned
moving electrons generate a magnetic filed
movement of electrons creates a magnets field
attracted to iron, nickel and cobalt
how do compaction and cementation cause sediments and form sedimentary rock
Answers
Answer:
Dissolved minerals in the ground water precipitate (crystallize) from water in the pore spaces forming mineral crusts on the sedimentary grains, gradually cementing the sediments, thus forming a rock
Explanation:
HELP Give the formula for:
Disulfur octahydride
Answers
Answer:
S2H8
Explanation:
Although it might not occur possibly, we can write the formula for disulphur octahydride
We have two elements here, sulphur and hydrogen
The multiplicity of the sulphur is di while that of the hydrogen is octa
So the formula we are looking at here is S2H8
Density is d= m/vol. If a material has a mass of 65.5 g and a volume of 32.5 ml, it has a density of
Answers
Using the given formula, the density of the material is 2.015 g/mL
Calculating DensityFrom the question, we are to determine the density of the material
From the given formula
Density = Mass / Volume
And from the given information,
Mass = 65.5 g
and volume = 32.5 mL
Putting the parameters into the equation,
Density = 65.5/32.5
Density = 2.015 g/mL
Hence, the density of the material is 2.015 g/mL.
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Oops...
How can glass be a liquid if it's so hard?
Answers
Answer:
because yes
Explanation:
Answer:
When heated, glass can become a sort of liquid I guess :>
Explanation:
A mixture of 35. 45 g Cl2 and 28. 02 g N2 has a total pressure of 6. 0 atm. What is the partial pressure Cl2?
Answers
The partial pressure of \($Cl_2$\) in the mixture is 3.25 atm. The partial pressure of a gas in a mixture is the pressure that gas would exert if it alone occupied the volume of the mixture at the same temperature.
To calculate the partial pressure of \($Cl_2$\) in the given mixture, we need to use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
We can rearrange this equation to solve for the number of moles of a gas:
n = PV/RT
Now, we can use the given asses of \($Cl_2$\) and N2 to calculate the number of moles of each gas:
\($n(Cl_2)=\frac{m(Cl_2)}{M(Cl_2)}$\)
= 35.45 g / 70.91 g/mol
= 0.499 mol
\($n(N_2)=\frac{m(N_2)}{M(N_2)}$\)
= 28.02 g / 28.01 g/mol
= 0.999 mol
The total number of moles of gas in the mixture is the sum of the moles of \($Cl_2$\) and N2:
n(total) = n(\($Cl_2$\)) + n(\($N_2$\)) = 1.498 mol
Now, we can use the total pressure of the mixture to calculate the partial pressure of \($Cl_2$\):
\($P(Cl_2)=\frac{n(Cl_2)RT}{V}$\)
= \($(0.499\text{ mol})\left(\frac{0.08206\text{ L}\cdot\text{atm}}{\text{mol}\cdot\text{K}}\right)(298\text{ K})/V$\)
Similarly, we can calculate the partial pressure of N2:
\($P(N_2)=\frac{n(N_2)RT}{V}$\)
= \($(0.999\text{ mol})\left(\frac{0.08206\text{ L}\cdot\text{atm}}{\text{mol}\cdot\text{K}}\right)(298\text{ K})/V$\)
The sum of the partial pressures must equal the total pressure:
\($P(Cl_2)+P(N_2)$\) = 6.0 atm
Substituting the expressions for P(\($Cl_2$\)) and P(\($N_2$\)) and simplifying, we get:
\($(0.499\text{ mol})\left(\frac{0.08206\text{ L}\cdot\text{atm}}{\text{mol}\cdot\text{K}}\right)(298\text{ K})/V + (0.999\text{ mol})\left(\frac{0.08206\text{ L}\cdot\text{atm}}{\text{mol}\cdot\text{K}}\right)(298\text{ K})/V$\)
= 6.0 atm
Solving for V, we get:
V = 2.28 L
Now, we can substitute the value of V into the expression for P(\($Cl_2$\)) and simplify to get:
\($P(Cl_2)=\frac{(0.499\text{ mol})\left(\frac{0.08206\text{ L}\cdot\text{atm}}{\text{mol}\cdot\text{K}}\right)(298\text{ K})}{2.28\text{ L}}$\)
= 3.25 atm
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the general formula for the alkane series is:
Answers
Answer:
The alkanes comprise a series of compounds that are composed of carbon and hydrogen atoms with single covalent bonds. This group of compounds comprises a homologous series with a general molecular formula of C n H 2 n+2 , where equals any integer.
Explanation:
The general formula for the alkane series is CnH2n+2
General formula for the alkane series:In this formula:
"Cn" shows how many carbon atoms are in the alkane molecule.
"H2n+2" shows the amount of hydrogen atoms in the alkane compound, with "n" being the number of carbon atoms.
Alkanes are a group of hydrocarbons that only have single bonds between their carbon atoms. The formula says that each carbon atom is connected to two hydrogen atoms. And the total number of hydrogen atoms in an alkane molecule is two more than double the number of carbon atoms.
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(show work please) At what temperature (in kelvin) would a 700ml balloon that has a pressure of 720mmhg and contained 0.25 mol of helium be?
Answers
Answer:
The ideal gas law is PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin.
To solve for temperature, we rearrange the equation to T = PV/nR.
First, we need to convert the volume to liters: 700 mL = 0.7 L.
The pressure also needs to be converted to atmospheres: 720 mmHg = 0.947 atm.
Now we can plug in the values:
T = (0.947 atm)(0.7 L)/(0.25 mol)(0.08206 L·atm/mol·K)
T = 24.8 K
Therefore, the temperature of the balloon is approximately 24.8 Kelvin.
why are so many products made from plastic ?
Answers
Explanation:
Plastic takes time to degrade which means it has great longevity. Plastic does not break as easily as glass or other materials. It lasts long and offers great service. Plastic storage containers offer greater flexibility than any other packaging materials.
What is your opinion on Mercury element
Answers
Answer:
Mercury is an liquid metal
Explanation:
Mercury is a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum.
Symbol: Hg
Suppose the interaction between two atoms by the Lennard-Jones potential: ULJ = B/r^12 - A / r^6 where the values of A and B are known to be A = 10^-77 J x m^6 and B = 10^-134 J x m^12.
What does the Lennard-Jones potential predict for the separation r=r eq
hen the energy is at the minimum (equilibrium) value, U min. What is the u min fot this interaction at T=298 K ? What is the ratio of U min to the purely attractive van der Waals component of the interaction potential at r eq.
What is the ratio of r eq to r 0 defined by u(r 0 )=0. 4. What is the ratio of r s to r 0 , where r s is the separation where the magnitude of the (attractive adhesion) force is maximum, F max . What is the value for F max between the two atoms?
Answers
a) The Lennard-Jones potential predicts the separation r_eq at the minimum energy U_min.
b) The U_min for this interaction at T=298 K is the value obtained from the Lennard-Jones potential equation when r=r_eq.
c) The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the attractive part (-A/r^6) to the total potential energy U_min.
d) The ratio of r_eq to r_0, where u(r_0)=0.4, can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.
e) The ratio of r_s to r_0, where r_s is the separation where the magnitude of the attractive adhesion force is maximum, can be determined by finding the value of r where the derivative of the potential energy with respect to r is equal to zero.
f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the potential energy equation with respect to r and evaluating it at r=r_s.
a) The Lennard-Jones potential provides information about the relationship between energy and separation between two interacting atoms.
At the minimum energy (U_min), the potential predicts the separation r_eq, which corresponds to the equilibrium distance between the atoms. This is the distance at which the energy of the system is at its lowest point.
b) To determine the value of U_min at a given temperature (T=298 K), you can substitute the equilibrium separation r_eq into the Lennard-Jones potential equation and calculate the resulting energy value.
This will give you the U_min for the interaction.
c) The Lennard-Jones potential consists of two components: an attractive component (-A/r^6) and a repulsive component (B/r^12).
The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the magnitude of the attractive component to the total potential energy at the equilibrium separation.
This ratio provides insights into the relative contribution of the attractive force to the overall potential energy at equilibrium.
d) The ratio of r_eq to r_0 can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.
In other words, you need to solve the Lennard-Jones potential equation for r_eq when the potential energy is equal to 0.4 times the potential energy at r=r_0.
e) The ratio of r_s to r_0 is obtained by finding the value of r where the magnitude of the attractive adhesion force is maximum.
This can be determined by finding the separation r where the derivative of the potential energy equation with respect to r is equal to zero.
The value of r_s represents the separation at which the attractive force between the atoms is strongest.
f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the Lennard-Jones potential energy equation with respect to r and evaluating it at r=r_s.
This will give you the magnitude of the maximum attractive adhesion force between the atoms.
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Which of these objects have potential energy?
Group of answer choices
A) a ball moving through the air
B) a ball deflating
C) a ball is someone's hand
Answers
Answer:
it's C. but the sentence is incorrect I think it should be a ball "in" someone's hand
Explanation:
cause potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
Carbon dioxide and water are produced when pentane (C5H12) reacts with oxygen. What is the balanced equation for this reaction?
○C5H12(g) + O29) - CO2(g) + H2O(g) ○C5H12(g) + O2(g) - 5CO2(g) + H2O(g)
○C5H12(g) +802(g) - 5CO2(g) + 6H2O(g) ○5CO2(g) + 6H2009) - C5H12(g) + 802(g)
○C5H12(g) +502(g) - 5CO2(g) + 6H2(g)
○CH2(g) +O2(g) + CO2(g) + H2(g)
Answers
Answer:
C
Explanation:
C5H12(g) +802(g) - 5CO2(g) + 6H2O(g)
The balanced chemical equation of pentane (C5H12) which reacts with oxygen is
C5H12(g) +802(g) - 5CO2(g) + 6H2O(g)
What is balanced chemical equation?It is the chemical equation in which the atom or molecules or moles of elements on both side reactant and product.
Our reactants are pentane and oxygen. Since, fourth and sixth reaction do not contain pentane. Therefore, fourth and sixth reaction are wrong.
Now, our next step is to compare product.
As we know that, Carbon dioxide and water are produced when pentane (C5H12) reacts with oxygen. So, we get to the conclusion that carbon dioxide and water are the product.
Since, rest of the equation have carbon dioxide and water as product.
On reactant side, there are 5 carbon atoms and 12 hydrogen atom. So, on product side there must be 5 carbon atoms and 12 hydrogen atom. Now we balance the oxygen atom on both side.
Thus, we concluded that the balanced chemical equation of pentane (C5H12) which reacts with oxygen is
C5H12(g) +802(g) - 5CO2(g) + 6H2O(g).
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What speed will you have to go from Chicago to Hackensack in 260 hours
Answers
Speed you will have to go from Chicago to Hackensack in 260 hours is 4.9Km/hr.
The pace at which an object's position changes in any direction is referred to as its speed. The distance travelled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.Speed = distance / timeUnit of speed is Km/hr or m/sec. Speed is calculated by dividing the distance travelled by the amount of time it took to get there. Divide the distance by the speed to find the passing time. Multiply the speed by the time to find the distance.Given,
Time = 260 hours
distance between Chicago to Hackensack is 1277 km
So speed = 1277/ 260 = 4.9 Km/ hr
Therefore, speed required to go from Chicago to Hackensack in 260 hours is 4.9 Km/ hr.
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There are many ways of generating electrical energy. Research three of the following, describe how they work, and discuss the pros and cons of each of the three chosen electrical power plants:
thermal power plant (aka coal power plant)
nuclear power plant
solar power plant
hydroelectric power plant
geothermal power plant
tidal power plant
wind farms
Answers
Answer:
Wind farms, nuclear power plant, and hydroelectric power plants
Explanation:
Winds farms:
Pros: Creates electrical energy easily, doesn't cause pollution and no fossil fuels.
Cons: Only works in windy climates, hard to function.
Nuclear plants:
Pros:Creates electrical energy out of wastes, very easy and doesn't require fossil fuels.
Cons: Causes mass pollution, very harmful to the ecosystem and humans.
Hydroelectric plants:
Pros: uses only water and turbines, no fossil fuels either.
Cons: Water usage causes faster evaporation, most dams overuse them.
The rows in the periodic table are called periods.
What is true about elements in the same period?
Answers
Answer:
elements in the same period have the same number of shells
the period number the element is in, that is the number of shells it has.
Why was the actual acceleration of mass a you calculated in question 2d less than the expected acceleration calculated in question 2a?
Answers
While acceleration generally decreases as mass increases, it tends to increase as force increases.Therefore, the greater force acting on more massive objects is counteracted by the enhanced inverse effect of mass.
What relationship do you suppose exists between the two masses and the rate that the heavier object descends?It is obvious from the expression above that the acceleration will be higher with a larger difference in masses.Therefore, the heavier object will move faster if the difference in mass between the two objects is higher.
Why does having less mass make acceleration easier?Mass times acceleration equals force.Therefore, the force needed to move anything will be less the smaller the mass.Additionally, less force is needed the slower your move the object.
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what will be the result of the reaction
(CH3COO)2+redP +Cl2
Answers
Answer:
(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl
Explanation:
This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.
Some viruses attack cells by attaching to their outer covering entering and taking over their genetic machinery.viruses are able to invade cells after first attaching to their
Answers
Electrons have been shown to have both wavelike and particle-like properties. (4 points)
True
False
Answers
Answer:
True
Explanation:
Because electrons go in different paths they can be a wavy type of path and they have particle like properties too because they are small and then they can be in string like forms too.