heat alwais moves from ____ to _____.

RFLP is a technique that uses restriction enzymes to cut DNA molecules into fragments of varying sizes. Control band: 10kb, EcoRI band: 5kb, Bam HI bands: 6kb, 3kb, 1kb, EcoRi and Bam HI bands: 4kb, 3kb, 2kb, 1kb. You will find the map bellow and attached.

RFLP means Restriction Fragment Length Polymorphisms. This technique uses restriction enzymes to cut DNA molecules into different short sequences of varying lengths.

A restriction enzyme is a degradative polymer that recognizes and cuts up specific nucleotide sequences in DNA. For instance,

Fragments lengths and the frequency in which the restriction enzyme produce the cuts depend on the recognition sequences and the number of bases that compose them.

These short sequences are separated using the gel electrophoresis method, which is based on fragment sizes.

The result is a pattern of band differentiation that depends on the fragment size and charge.

Sizes:

To build the map, we need to remember that

The order is (from left to right)

   BamHi            EcoRI     BamHI

-----//--------------------//----------//---------------

1kb         4kb                 2kb       3kb

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Answer: I would love to help but i cant see the table

Explanation:

Jana can modify her device by increasing the amount of zinc and decreasing the amount of copper sulfate to generate more heat, which will increase the water temperature within the desired range of 70°C to 100°C.

How could Jana modify her design to meet the temperature constraints?

By making these modifications, Jana can increase the water temperature to the desired range and ensure that her device is portable, safe, and effective.

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This problem is providing us with the molality of a solution of calcium iodide as 0.01 m. So the most likely van't Hoff factor is required and theoretically found to be 3 due to the following:

In chemistry, the correct characterization of solutions also imply the identification of the ions it will release in aqueous solution. For that reason, the van't Hoff factor gives us an idea of this number, according to the formula the solute has got.

In such a way, for calcium iodide, we write its ionization equation as shown below:

\(CaI_2\rightarrow Ca^{2+}+2I^-\)

Assuming it is able to ionize due to the low molality, because if it was higher, then it won't ionize. Hence, since we have three moles of ion products, one Ca²⁺ and two I⁻, we can conclude the van't Hoff factor would be 3, although calculations may lead to a different, yet close result.

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The total pressure exerted by the mixture of N2 and O2 in the given vessel is approximately 26.456 atm.

To calculate the total pressure exerted by a mixture of gases, we can use the ideal gas law:

PV = nRT

Where:

P is the pressure in atmospheres (atm)

V is the volume in liters (L)

n is the number of moles of gas

R is the ideal gas constant (0.0821 L·atm/(mol·K))

T is the temperature in Kelvin (K)

To find the number of moles of each gas, we can use their respective molar masses:

Molar mass of N2 = 28.0134 g/mol

Molar mass of O2 = 31.9988 g/mol

First, we calculate the number of moles of each gas:

Number of moles of N2 = mass of N2 / molar mass of N2

= 30.312 g / 28.0134 g/mol

≈ 1.0822 mol

Number of moles of O2 = mass of O2 / molar mass of O2

= 47.635 g / 31.9988 g/mol

≈ 1.4892 mol

Now we can substitute these values into the ideal gas law to find the total pressure:

Ptotal = (nN2 + nO2) * RT / V

Ptotal = (1.0822 mol + 1.4892 mol) * (0.0821 L·atm/(mol·K)) * 306.43 K / 2.032 L

Ptotal ≈ 26.456 atm

Therefore, the total pressure exerted by the mixture of N2 and O2 in the given vessel is approximately 26.456 atm.

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Answer:

I did not understand the question

During that icy hot lab, 65,000 J of energy was transferred to 450 g of water at 20°C, the final temperature of the water will be 54.5 °C.

Energy transferred = 65,000 J or 65 KJ

Mass of the water = 450 g

Initial temperature (T1) = 20 °C

Final temperature (T2) = ?

Specific heat of H2O = 4.186 J /g. °C

We will calculate the final temperature by using the following equation.

q = m.c.ΔT

Rearrange it for ΔT

ΔT = q / m.c

And ΔT = T2 - T1

Put ΔT value in the equation

T2 - T1 = q / m.c

Put the values

T2 - 20°C = 65000 j / 450 g × 4.186 J /g. °C

T2 - 20°C = 65000 j / 1883.7 j /°C

T2 - 20°C = 34.51 °C

T2 = 34.51 °C + 20 °C

T2 = 54.5 °C

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Answer:

A

Explanation:

good luck

Antibodies against nicotinic acetylcholine receptors (nAChR), present at neuromuscular junction (NMJ), can affect function of junction by interfering with normal signaling between nerve and muscle.

Antibodies against nicotinic acetylcholine receptors (nAChR), which are present at neuromuscular junction (NMJ), can affect the function of junction by interfering with normal signaling between nerve and muscle.

At NMJ, the nerve terminal releases acetylcholine (ACh), which binds to nAChR on muscle cell membrane, leading to depolarization of muscle cell and muscle contraction. If antibodies bind to nAChR, they can block or reduce the number of available receptors for ACh, leading to decrease or even complete loss of the normal muscle response to nerve stimulation.

This can result in muscle weakness, fatigue, and even paralysis, depending on the severity of antibody binding and amount of functional nAChR remaining at the NMJ.

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Answer:

Sry i accidently clicked on ''SAVE''.

U can remove it or report it...

Explanation:

The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Answer:

A. water evaporating. it must be there.

mass of helium = 18.6 g. To answer this question, we can use the ideal gas law, which relates the pressure, volume, temperature, and amount of a gas.

According to 1, the ideal gas law is often written as:

PV = nRT

where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the ideal gas constant and T is the temperature of the gas.

We are given the values of P, V and T, and we need to find n. We can rearrange the equation to solve for n:

n = PV/RT

We also need to make sure that we use consistent units for P, V, T and R. According to 2, if we use R = 8.31 J/K/mol, then we must use P in pascals (Pa), V in cubic meters (m³), and T in kelvins (K).

We can convert the given values to these units as follows:

P = 1.89 x 10³ kPa x 10³ Pa/kPa = 1.89 x 10⁶ Pa

V = 685 L x 10⁻³ m³/L = 0.685 m³

T = 62°C + 273.15 = 335.15 K Plugging these values into the equation for n, we get:

n = (1.89 x 10⁶ Pa) x (0.685 m³) / (8.31 J/K/mol) / (335.15 K)

n = 4.64 mol

To find the mass of helium in grams, we need to multiply n by the molar mass of helium, which is 4 g/mol according to 3. Therefore,

mass of helium = 4.64 mol x 4 g/mol = 18.6 g

Rounding to three significant digits, we get:

mass of helium = 18.6 g

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Answer:

Explanation:

Absolutely true

Answer:

4NaHCO3---->2Na2CO3+2CO2+2H2O

Different substances have different properties because of the differences in their atomic and molecular structure, bonding types, and strength of their chemical bonds. These differences can be due to the number of atoms, the arrangement of atoms, and the types of electrons involved in the bonding.

The properties of elements and compounds are determined by the types and arrangements of the atoms that make up the substance. For example, water (H2O) and hydrogen peroxide (H2O2) have different properties due to their different molecular structures. Water is made up of two hydrogen atoms and one oxygen atom, while hydrogen peroxide is made up of two hydrogen atoms and two oxygen atoms. may have different characteristics. The strength of chemical bonds between atoms or molecules can be affected by the number and type of electrons involved in the bond. Because of this, some substances are more stable than others and have higher melting and boiling points.

In addition, some properties are also affected by the physical state of the material, such as solubility, density, and conductivity. These properties are determined by the strength of the intermolecular forces between the particles of the substance.

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Answer:

\(\huge\color{cyan}{\colorbox{magenta}{Answer}}\)

thank you

The colors of the starting solutions differ in case of high and low concentrations, because the titrations start at different pH values.

The colors of the starting solutions vary in case of high and coffee concentrations, due to the fact the titrations start at distinctive pH values. In case of excessive concentrations, the starting color is of brilliant pink red, converting to purple orange all through innovative titration.

The signs have a chemical structure which can soak up mild beneath positive pH conditions and both change shade or grow to be colorless below other pH situations. This normally happens because of a exchange in protonation of the purposeful group of the molecule.

Whether an answer is acidic or simple can be measured at the pH scale. When everyday indicator is brought to a solution, the color change can indicate the approximate pH of the solution. Acids purpose universal indicator option to trade from green in the direction of crimson.

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The 1000 kg ball would have 62500 J of kinetic energy; The 10 kg ball would have 125 J of kinetic energy; The 100 kg person would also have 1250 J of kinetic energy.

Kinetic energy is the energy an object possesses due to its motion. It is defined as the energy that an object has as a result of its motion, and is dependent on the mass and velocity of the object.

To calculate the kinetic energy of an object, we use the formula:

KE = \(1/2 * m * v^{2}\)

where m is the mass of the object and v is its velocity.

Given that a 100 kg ball is traveling at 5 m/s, we can calculate its kinetic energy:

KE = \(1/2 * 100 kg * (5 m/s)^2\) = 1250 J

Using the same formula, we can calculate the kinetic energy for the following scenarios:

A 1000 kg ball traveling at 5 m/s:

KE =\(1/2 * 1000 kg * (5 m/s)^2\)= 62500 J

The 1000 kg ball would have 62500 J of kinetic energy, which is 50 times greater than the kinetic energy of the 100 kg ball.

A 10 kg ball traveling at 5 m/s:

KE = \(1/2 * 10 kg * (5 m/s)^2\)= 125 J

The 10 kg ball would have 125 J of kinetic energy, which is 10 times smaller than the kinetic energy of the 100 kg ball.

A 100 kg person traveling at 5 m/s:

KE = \(1/2 * 100 kg * (5 m/s)^2\) = 1250 J

The 100 kg person would also have 1250 J of kinetic energy, which is the same as the kinetic energy of the 100 kg ball.

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To solve this problem, we can 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 gas constant, and T is the temperature in Kelvin.

Since we are dealing with the same gas (oxygen) at the same temperature and pressure, we can assume that the value of R is constant. Therefore, we can write:

PV/n = RT

The ratio PV/n is known as the molar volume of the gas, and is constant for a given temperature and pressure. We can use this relationship to find the volume of oxygen gas that corresponds to 5.00 g.

First, we need to calculate the number of moles of oxygen gas in 1.9 g:

n = m/M

where m is the mass of the gas and M is the molar mass of oxygen, which is 32 g/mol.

n = 1.9 g / 32 g/mol

n = 0.059375 mol

The molar volume of oxygen gas at the given temperature and pressure is:

PV/n = RT/n

V/n = RT/P

Substituting the given values, we get:

V/n = (0.0821 L·atm/mol·K) x (273 K) / (1 atm)

V/n = 22.414 L/mol

Therefore, the volume of 1.9 g of oxygen gas is:

V1 = n x V/n = 0.059375 mol x 22.414 L/mol = 1.331 L

Now we can use the molar volume to find the volume of 5.00 g of oxygen gas:

n = m/M = 5.00 g / 32 g/mol = 0.15625 mol

V2 = n x V/n = 0.15625 mol x 22.414 L/mol = 3.51 L

Therefore, 5.00 g of oxygen gas will occupy a volume of 3.51 L at the same temperature and pressure as 1.9 g of oxygen gas.

Answer:

food

Explanation:

Answer:

nuclear energy

Explanation:

this holds the nucleus together

Answer:

N,I and F

hope this helps

Explanation:

Answer:

See explanation

Explanation:

A reaction in which heat and light are produced is a combustion reaction. Combustion is said to have occurred when a substance is burnt in oxygen.

The balanced equation of the reaction is;

4Li(s) + O2(g) ------->2Li2O(s)

This reaction is exothermic because heat was produced. The reaction has a low activation energy as the metal easily burst into flames in oxygen. A catalyst is not needed in this reaction because it has a low activation energy.

According to the law of conservation of mass. Atoms are neither created nor destroyed in a chemical reaction. What this means is that in a chemical reaction, the number of atoms of each element on the left hand side must be the same as the same as the number of atoms of the same element on the right hand side.

Answer:

E = hc/λ

Explanation:

To calculate the energy of a photon of radiation, we can use the formula:

E = hf = hc/λ

where:

E = energy of the photon (in Joules)

h = Planck's constant (6.626 x 10^-34 Joule-seconds)

f = frequency of the radiation (in Hertz)

c = speed of light (3.0 x 10^8 meters/second)

λ = wavelength of the radiation (in meters)

For a frequency of 8.24 x 10^14 Hz:

E = hf = (6.626 x 10^-34 J*s)(8.24 x 10^14 Hz) = 5.46 x 10^-19 J

For a wavelength of 6.44 x 10^-9 m:

E = hc/λ = (6.626 x 10^-34 J*s)(3.0 x 10^8 m/s)/(6.44 x 10^-9 m) = 3.07 x 10^-19 J

To calculate the wavelength of light that emits 3.3 x 10^-13 Joules of energy:

E = hc/λ

λ = hc/E = (6.626 x 10^-34 J*s)(3.0 x 10^8 m/s)/(3.3 x 10^-13 J) = 6.01 x 10^-7 m = 601 nm

Answer:

When two plates press together and a mountain begins to form, which of the following happens? The plate slowly begins to bend because even though the plate material is hard it can still be bent and folded over a very long period of time.

When the gas is heated from -50°C to 28°C, the new volume is approximately 17.24 L.

To calculate the new volume of a gas when it is heated from -50°C to 28°C, we can use the combined gas law, which relates the initial and final conditions of temperature and volume.

The combined gas law is expressed as:

(P1 * V1) / T1 = (P2 * V2) / T2

Where:

P1 = Initial pressure

V1 = Initial volume

T1 = Initial temperature in Kelvin

P2 = Final pressure (assumed constant in this case)

V2 = Final volume (to be calculated)

T2 = Final temperature in Kelvin

First, we need to convert the initial and final temperatures from Celsius to Kelvin:

Initial temperature in Kelvin (T1) = -50°C + 273.15 = 223.15 K

Final temperature in Kelvin (T2) = 28°C + 273.15 = 301.15 K

Since the pressure is assumed to be constant, we can simplify the equation:

(V1 / T1) = (V2 / T2)

Now we can substitute the given values into the equation:

(12.78 L / 223.15 K) = (V2 / 301.15 K)

Cross-multiplying and solving for V2:

V2 = (12.78 L * 301.15 K) / 223.15 K

V2 ≈ 17.24 L

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Answer:

I think it may be C because Newton's second law of motion states that the acceleration of an object equals the net force acting on the object divided by the object's mass.

There's also a possibility of B as well because the Law of force and acceleration but im not sure

The volume of dry hydrogen gas at standard atmospheric pressure (which is typically defined as 1 atm or 101.325 kPa) depends on the number of moles of hydrogen gas present. The ideal gas law, PV = nRT, relates the pressure (P), volume (V), number of moles (n), and temperature (T) of an ideal gas. Assuming standard temperature and pressure (0°C and 1 atm), one mole of any ideal gas occupies a volume of 22.4 L. Therefore, to find the volume of dry hydrogen gas at standard atmospheric pressure, we need to know how many moles of hydrogen gas we have.

For example, if we have 1 mole of dry hydrogen gas at standard atmospheric pressure, the volume would be 22.4 L. If we have 0.5 moles of dry hydrogen gas, the volume would be 11.2 L. And so on.

Answer:

Atoms

Explanation: