The process in reproduction and growth by which a cell divides to form daughter cells


A. biotechnology
B. diversity
C.cell division
D.fertilization

True, the workers cannot enter the lab that possesses sources of radioactive materials without additional training and approval from the Radiation Safety Officer.

Ionizing and non-ionizing radiation, potential health risks posed by industrial machinery that emits radiation, and methods for reducing occupational radiation exposure through engineering controls and safe handling practices are all covered in radiation safety training.

Personnel radiation exposure must be kept as low as reasonably possible for anyone who works with radioactive materials (ALARA). To do this, the standard laboratory best practices and methods are included in this section. Additional particular precautions and circumstances could be mentioned in the Radiation Use Authorization (RUA).

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Answer:

Suppose a piece of iron with a mass of 21.5 g at a temp of 100.0 °C is dropped into an insulated container of water. The mass of the water is 132.0 g and its temperature before adding the iron is 20.0 °C. What will be the final temp of the system? Specific heat of iron is 0.449 kJ/kg K.

Solution:

1) Since

qlost, metal = qgained, water

we write

(mass) (Δt) (Cp, metal) = (mass) (Δt) (Cp, water)

2) Substituting:

(21.5) (100 − x) (0.449) = (132.0) (x − 20) (4.184)

Some explanation:

a) 100 − x is the Δt for the metal; it starts at 100.0 °C and drops to some unknown, final value.

b) x − 20 is the Δt for the water; it starts at 20.0 °C and rises to some unknown, final value.

c) Since both metal and water wind up at the same ending value, we need to use only one unknown for the two Δt expressions.

3) A wee bit of algebra:

(2150 − 21.5x) (0.449) = (132x − 2640) (4.184)

965.35 − 9.6535x = 552.288x − 11045.76

561.9415x = 12011.11

To 3 sig figs, the answer is 21.4 °C.

Explanation:

hope its correct!

The correct answer is (e) all of (b), (c), and (d). Carbon (C), nitrogen (N), and oxygen (O) are nonmetals that can form strong covalent bonds with one another, creating a covalent network solid.

Nickel (Ni) is a metal and typically forms metallic bonds, not covalent network solids.

Metallic bonds are formed by the attraction between positively charged metal ions and the sea of delocalized electrons that surround them. This results in the unique properties of metals, such as malleability, ductility, and conductivity.

It's worth noting that while carbon, nitrogen, and oxygen can form covalent network solids with each other, they do not necessarily form covalent network solids with all other nonmetals.

For example, carbon and hydrogen form covalent compounds such as methane (CH4), while oxygen and hydrogen form covalent compounds such as water (H2O).

The ability of atoms to form covalent bonds depends on a variety of factors, including the electronegativity of the atoms and their valence electron configuration.

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Answer:

I believe it is 3. All of these.

Explanation:

Not all organisms hold their genetic code (DNA) inside a nucleus. In fact, some organisms don't have a nucleus at all but I'm pretty sure that these three do. I would select all of these.

Hope that helps and have a nice day.

Based on the principles of fluid mechanics and erosion, the water in the river flows faster on the outside of the bend and slower on the inside.

Meandering rivers are formed due to the lateral erosion of the riverbank, which creates a curvy path for the water to flow. This is caused by the differences in water velocity between the outside and inside bends of the river.

The above difference in velocity causes the water on the outside to exert more erosive force on the bank, leading to more erosion on the outside of the curve. The slower-moving water on the inside, by contrast, tends to deposit sediment, which can result in the formation of sandbars and other features.

Therefore, it is likely that there is more erosion on the outside of the curve in the riverbed as water flows through it.

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Answer:

X: Captive Breeding

Y: Habitat Preservation

Explanation:

Answer:its d

Explanation:

uhhh its d

ANSWER

Water molecule is a compound

EXPLANATION;

Water molecule is formed from the combination of oxygen and hydrogen atoms

Recall, that compound is the combination of two or more elements that are chemically combined together

Therefore, water molecule is a compound

Answer:A moon

Explanation:

Answer:

A Moon

Explanation:

I just took the test

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer: 1.8 million years ago

Explanation:

Answer:

Determine the volume of the sample of CO2(g) if the temperature and pressure are changed to 336K and 152.0 kPa. Answer-->151 mL (PV/T=PV/T ) 60.

The combined gas law gives the value of the volume. The final volume at 336 K is 151.3 mL.

Charle's, Boyle's, and Gay-Lussac's laws together give the combined gas law. It is given as:

PV / T = k

Given,

Initial volume = 200 mL

Initial pressure = 101.3 kPa

Initial temperature = 296 K

Final pressure = 152 kPa

Final temperature = 336 K

The final volume is calculated as:

(P₁V₁) ÷ T₁ = (P₂V₂) ÷T₂

(101.3 × 200) ÷ 296 = (336 × V) ÷ 152

V = 151.3 mL

Therefore, 151.3 mL is the final volume at 300 K.

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The density of the metal sample is 3.781 g/mL.

To calculate the density, you need to divide the mass (22.82 g) by the volume (6.03 ml). Thus, 22.82 g / 6.03 ml = 3.781 g/mL.

Density is a measure of the mass per unit volume of a material or object. It is calculated by dividing the mass by the volume. The SI unit of density is kg/m3, but for solids and liquids, g/mL is a commonly used unit of density.

The density of a material or object will change depending on the temperature or pressure, so it is important to consider the temperature and pressure when determining the density of a material or object. For example, the density of water changes from 0.958 g/mL at 4°C to 0.997 g/mL at 25°C.

Therefore, when calculating the density of a metal sample, it is important to ensure that the mass and volume are measured at the same temperature and pressure.

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Answer:

Valence electrons of selenium will be placed in s and p-orbitals.

If the cells do not multiply by mitosis then the wound will not heal.

There are two kinds of cell division and these are mitosis and meiosis. We have to note that mitosis occurs at the body cells and the exact number of chromosomes in the parent cell is transferred to the daughter cells.

Meiosis occurs in the gamete cells and each of the parent cells would only contribute half of the maximum number of the chromosomes that they contain.

We know that when we have a cut, the cells around the area of the cut would begin to multiply by the process of mitosis helping the wound to heal.

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Answer:

The specific heat of the metal is 0.0482 joules per gram-Celsius.

Explanation:

Block of metal is cooled by adding water and thermal equilibrium is reached. According to the First Law of Thermodynamics and by supposing the absence of energy and mass interaction of the system with surroundings, the change in the energy of the system is represented by:

\(\Delta U_{m} + \Delta U_{w} = 0\)

Where \(\Delta U_{m}\) and \(\Delta U_{w}\) are the changes in internal energies of the block of metal and water, measured in joules.

The expression described above is now extended by applying the definition of internal energy for constant mass systems:

\(m_{m}\cdot c_{v,m}\cdot (T_{m,in}-T_{m,out}) + m_{w}\cdot c_{v,w}\cdot (T_{w,in}-T_{w,out})= 0\)

Where:

\(m_{m}\), \(m_{w}\) - Masses of the block of metal and water, measured in grams.

\(c_{v,m}\), \(c_{v,w}\) - Specific heats of the block of metal and water, measured in joules per gram-Celsius.

\(T_{in, m}\), \(T_{in, w}\) - Initial temperatures of the block of metal and water, measured in Celsius.

\(T_{out, m}\), \(T_{out, w}\) - Final temperatures of the block of metal and water, measured in Celsius.

The specific heat of the metal is cleared in the equation:

\(c_{v,m} = -\frac{m_{w}\cdot c_{v,w} (T_{w,in}-T_{w,out})}{m_{m}\cdot (T_{m,in}-T_{m,out})}\)

If \(m_{m} = 12.6\,g\), \(m_{w} = 100\,g\), \(c_{v,w} = 4,186\,\frac{J}{kg\cdot ^{\circ}C}\), \(T_{w,in} = 21\,^{\circ}C\), \(T_{m,in} = 94\,^{\circ}C\) and \(T_{m,out} = T_{w,out} = 25.1\,^{\circ}C\), the specific heat of the metal is:

\(c_{v,m} = -\frac{(100\,g)\cdot \left(4,186\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot (25\,^{\circ}C-25.1\,^{\circ}C)}{(12.6\,g)\cdot (94\,^{\circ}C-25.1\,^{\circ}C)}\)

\(c_{v,m} = 0.0482\,\frac{J}{kg\cdot ^{\circ}C}\)

The specific heat of the metal is 0.0482 joules per gram-Celsius.

The smaller value of x is the limiting factor, so we can conclude that 6.02 moles of H₃PO₄can form during the reaction.

From the given information, we know that 2.0 mol P₄O₁₀ can form 8.0 mol H₃PO₄. Therefore, if we have x moles of H₃PO₄, we would need 0.25x moles of P₄O₁₀.

We also know that 8.0 mol H2O can form 5.3 mol H₃PO₄. Therefore, if we have x moles of H₃PO₄, we would need (8/5.3)x moles of H₂O

Since we need to use the limiting reactant to determine the amount of product formed, we can set up an inequality:

0.25x ≤ 2.0 (the amount of P₄O₁₀ available)

(8/5.3)x ≤ 8.0 (the amount of H₂O available)

Solving for x in both cases, we get:

x ≤ 8.0 (from the P₄O₁₀ reaction)

x ≤ 6.02 (from the H₂O reaction)

The smaller value of x is the limiting factor, so we can conclude that 6.02 moles of H₃PO₄ can form during the reaction.

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The  letter represent the transition from solid to liquid E. E.

Transition is a process of change from one state or condition to another. It is a fundamental element of life, as it allows us to move forward, adapt, and develop. Transition can be physical, emotional, spiritual, or even intellectual. It can involve a change in environment, relationships, beliefs, roles, or responsibilities. Transition can be gradual, or it can happen suddenly. It can be difficult and require a lot of effort, or it can be relatively easy. Transition can be a positive experience, or it can be a difficult experience. Regardless of the form it takes, transition is a necessary part of life and growth.

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Answer:

A. n= C x V

Explanation:

Molarity of a solution is the molar concentration of that solution. It can be calculated using the formula:

M = n/V

Where;

M = molarity (M)

n = number of moles (n)

V = volume (mL)

To calculate the number of moles from a given molarity value and volume, we say:

n = M × V

For this case of NH4Cl;

V = 500mL = 500/1000 = 0.5L

M = 0.300 M

n = 0.300 × 0.5

n = 0.15moles

Answer: n=CxV

Explanation:

Answer:

The Sunlight

Oxegyn

Heat in soi

Explanation:

Answer:

sun, air, and heat.

Explanation:

hope this helps!

According to World Population Review 2022 the safest country to live are as follows.

These countries are listed safe by calculating global peace index.

This index measures the nation's and regions peacefulness and is finally reviewed by Institute of Economic and Peace (IEP).

The role of IEP is to measure peace at the worldwide and country level degree and lets us to evaluate the social, political and financial elements that create peace. Each year the Institute for Economics and Peace produces the Global Peace Index, the world’s main degree of countrywide peacefulness, rating 163 nations in line with their ranges of peace.

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This is because convection is energy transfer by currents of moving liquid or gas.

Heat transfer by convection is the transfer of heat from one place to another due to the movement of fluid.

When cooking in a convection oven, for best results you place your food in the center of the oven, this is because convection is energy transfer by currents of moving liquid or gas.

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This is because convection is a type of energy transfer by currents of moving liquid or gas (Option A).

Convection is a physical natural phenomenon associated with energy transfer through a fluid.

In convection, a suitable fluid that produces what transfer can be for example air and/or water.

In conclusion, this is because convection is energy transfer by currents of moving liquid or gas (Option A).

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Answer:

8.923

Explanation:

The mass of 6.022*10*23 atoms, molecules, or formula units make up one mole of a substance, which is known as the molar mass. This value is given in grams per mole.

The mass of a sample of a chemical compound divided by the quantity, or number of moles in the sample, measured in moles, is known as the molar mass of that compound. A substance's molar mass is a bulk characteristic rather than a molecular one.

Atomic masses:

Number of atoms:

S - 1; O - 4; H - 2;

Molar mass =  32.06 + (1.01 * 2) + (16 * 4)

                   = 98.08 g/mol

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During replacement reaction cu(no3)2 and zn; Zn(NO3)2 + Cu are produced.

One element in a compound is replaced by another in a chemical reaction known as a single-displacement reaction, sometimes referred to as a single replacement reaction or exchange reaction.

An exchange of ions between the two reacting chemicals to create new compounds that are distinct from the two reacting compounds is known as a double displacement reaction. The following is an example:

XB + AY = XY + AB

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