a laser with a power of 1.0 mw has a beam radius of 1.0 mm. what is the peak value of the electric field in that beam? ( c=3.0×108m/s , μ0=4π×10−7t⋅m/a , ε0=8.85×10−12c2/n⋅m2 )

Answer: 115

Explanation: Given ,

    Half life of Strontium-90 = 28.8 years.

     Number of count sample(s) = 5

    Decay Sample counts  (d)= 0.3125

    Time taken for a 5-count sample to decay 0.3125 =?

    1 - First calculate (d/s) i.e (0.3125/5) = 0.0625.

   2- since its half life (1/2)^n  i.e (1/2)^n = 0.0625

     n log 0.5 = log0.0625

    n = (log0.0625/0.5) = 4.

    (1/2)^4 =(1/16)=0.0625 =>28.8 times 4 i.e 115.2 years.

   find more at : https://brainly.in/

   #SPJ4

(a) distance measured with metre rule or tape rule

    time measured with stopwatch/ stop clock/ timer

    Average speed = total distance / time

(b) (i) decrease in speed

    (ii) Change in speed = a * t

        4.5 m/s

hope this helps......

\(▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)

As we know, Number of protons = Atomic Number

So,

And, Atomic mass = Number of protons + Number of Neutrons (N)

therefore ~

Number of Neutrons = 19

A beverage with a high congeners content is wine. Congeners are byproducts of the fermentation and distillation processes in alcoholic beverages.

They are responsible for the flavor, aroma, and color of the beverage. Certain beverages, such as wine, contain a relatively high concentration of congeners compared to others.

Wine is produced by fermenting grapes, and the presence of congeners in wine contributes to its distinctive taste and character. Congeners in wine include various organic compounds such as alcohols, esters, and tannins. These compounds can affect the sensory experience and overall quality of the wine.

Other beverages like beer and vodka also contain congeners, but their composition and concentration may differ. Beer is brewed from grains, while vodka is distilled from fermented grains or potatoes. Wine coolers, on the other hand, are typically flavored and carbonated beverages that contain wine as a base.

In summary, wine is an example of a beverage with a high congeners content due to its fermentation process using grapes.

To know more about the Congeners refer here,

https://brainly.com/question/28153388#

#SPJ11

Answer:

a) 2,400,000 grams

Explanation:

A rectangular freshwater fish tank is 60.00 cm long, 200.00 mm wide, and 200.00 m deep. What is the mass of the water it can hold?

Step 1

We make sure the dimensions of the fish tank have the same units which is cm

Length = 60.00 cm

Width = 200.00 mm

1 mm = 0.1 cm

200.00mm =

200.00mm × 0.1 cm/1 mm

Width = 20 cm

Depth = 200 m

1 m =100 cm

200m =

= 200m × 100cm/1m

Depth = 20000cm

Step 2

Volume of a rectangular tank = Length × Breadth × Depth

= 60cm × 20cm × 20000cm

= 24000000cm³

Since = 1 cm³ = 1ml

Volume of the rectangular fish tank = 24,000,000ml

Step 3

The density of freshwater is 1.00 g/mL.

Density = Mass/Volume

Mass = Volume × Density

Mass of water the tank can hold = 24,000,000ml × 1.00g/ml

= 24,000,000grams

Therefore, the mass of water the rectangular fish tank can hold = 24,000,000 grams

The Ag\(_{2}\)CO\(_{3}\)   is formed when 25.0 ml of 0.200M AgNO\(_{3}\) is mixed with 50.0 ml of 0.800 M Na\(_{2}\)CO\(_{3}\) is 0.68 g.

According the question , the chemical equation is give by :

2AgNO\(_{3}\)   +   Na\(_{2}\)CO\(_{3}\)  ------->   Ag\(_{2}\)CO\(_{3}\)     +      2NaNO\(_{3}\)

Given that :

volume of silver nitrate = 25.0 ml or 0.025 L

molarity M =  0.200 M

volume of sodium carbonate = 50.0 ml or 0.050 L

molarity = 0.800 M

now, no. of moles of silver nitrate  =  0.025 × 0.200 = 0.005 moles

no. of mole of sodium carbonate = 0.050 × 0.800 =  0.04 moles

the no. of moles of silver carbonate ,  =  0.5 × 0.005

                                                                =  0.0025 moles

molar mass  of Ag\(_{2}\)CO\(_{3}\) = 275.7 g/mol

therefor, the mass of Ag\(_{2}\)CO\(_{3}\) =   0.0025 moles × 275.7 g/mol

                                                 =0.68 g

To learn more about Concentration here

https://brainly.com/question/15211488

#SPJ4

Approximately 159.75 grams of Na2SO4 will be formed if we have 89.9 grams of NaOH using stoichiometry and the balanced chemical equation.

To calculate the grams of Na2SO4 formed from 89.9 grams of NaOH, we need to use stoichiometry and the balanced chemical equation. The balanced chemical equation for the reaction between NaOH and H2SO4, which forms Na2SO4 and H2O, is:

2 NaOH + H2SO4 → Na2SO4 + 2 H2O

From the equation, we can see that 2 moles of NaOH react with 1 mole of H2SO4 to produce 1 mole of Na2SO4.

First, we need to convert grams of NaOH to moles using its molar mass (40 g/mol):

moles of NaOH = 89.9 g / 40 g/mol ≈ 2.25 moles

Since 2 moles of NaOH react to form 1 mole of Na2SO4, we can find the moles of Na2SO4 formed:

moles of Na2SO4 = 2.25 moles NaOH × (1 mole Na2SO4 / 2 moles NaOH) ≈ 1.125 moles

Finally, we can convert moles of Na2SO4 to grams using its molar mass (142 g/mol):

grams of Na2SO4 = 1.125 moles × 142 g/mol ≈ 159.75 g

So, approximately 159.75 grams of Na2SO4 will be formed if we have 89.9 grams of NaOH.

To know more about stoichiometry refer here:

https://brainly.com/question/30808199#

#SPJ11

Answer:

The stirring allows fresh solvent molecules to continually be in contact with the solute.

Same number of protons and different number of neutrons.

Oxygen is a chemical element with 8 protons. It is capable of achieving a noble gas electronic configuration by accepting two electrons. Oxygen is important for many living organisms.

Oxygen-16 and oxygen-18 differ in the number of neutrons in their nuclei. Oxygen-16 has 8 neutrons, while oxygen-18 has 10 neutrons. Oxygen-16 and oxygen-18 have the same number of protons and electrons. Both neutrons and protons have mass, so changing the number of neutrons changes the mass of oxygen. These elements with different numbers of neutrons are referred to as isotopes. Both oxygen-16 and oxygen-18 are stable isotopes of oxygen and are not radioactive.

To know more about the Oxygen, here

brainly.com/question/2272415

#SPJ4

Cytochrome c is an iron-containing enzyme found in the cells of all aerobic organisms and If cytochrome c is 0.43% by mass, then  its minimum molecular weight  is 13023.2 g .

Cytochromes are the main electron carries present in the electron transport chain . Minerals associated with cytochromes are Fe and Cu .

Calculation ,

100 g of enzyme contains 0.43 g Fe

X g of enzyme will contains 56 g of Fe

∴ 0.43 × X = 5600

X =  5600 / 0.43 = 13023.2 g or 13 kg/mol

Therefore , the minimum molecular weight of the enzyme is 13023.2 g or 13 kg/mol .

To learn more about iron-containing enzyme please click here

https://brainly.com/question/14170888

#SPJ4

Answer:

Agree

Explanation:

Theories are refined and then become laws and laws are somehow more important than theories. In science actually what a law is, is a descriptive generalization. So we talk about the laws of thermodynamics that tell you about heat under different circumstances.

The average gravity at Earth's surface is 9.8 meters per second per second. For example, when something is thrown off the top of a building or the edge of a cliff, it falls at a speed of 9.8 meters per second. The surface gravity of the Moon is around 1/6th as strong, or 1.6 meters per second every second.

The moon doesn't generate its own light, unlike a lamp or our sun. Actually, moonlight is sunlight that shines on the moon and reflects off of it. On the surface of the moon, the light bounces off old volcanoes, craters, and lava flows.

The Sun provides light to the Moon. The moon is home to some rather sizable mountains in addition to enormous craters and vast lava fields.

Learn more about the moon here:

https://brainly.com/question/14256406

#SPJ1

Compounds utilize both ionic and covalent bonding A) Na2SO4, also known as sodium sulfate.

This compound utilizes both ionic and covalent bonding in its structure.

Ionic bonding occurs between the sodium (Na) cation and the sulfate (SO4) anion. Na has a positive charge, while SO4 has a negative charge. This attraction between opposite charges causes the two ions to bond together, forming an ionic bond.

Covalent bonding occurs within the sulfate anion itself. The sulfur (S) atom and the four oxygen (O) atoms share electrons  to achieve a stable electron configuration. This sharing of electrons is called a covalent bond.

In Na2SO4, the ionic and covalent bonding work together to form a stable compound. The ionic bonding between Na and SO4 creates a crystal lattice structure, while the covalent bonding within the SO4 anion helps to hold the molecule together.

It is important to note that not all compounds utilize both ionic and covalent bonding. Some compounds, such as AlCl3 (B), utilize only ionic bonding, while others, such as PO4- (C), utilize only covalent bonding. Therefore, it is important to understand the chemical properties of each element and ion in a compound to determine the type of bonding that is occurring. Therefore the correct option is A

Know more about covalent bonding  here:

https://brainly.com/question/3447218

#SPJ11

The kinetic molecular theory of matter explains the physical properties of matter and how they relate to their molecular structures. This theory states that matter is made up of tiny particles, called molecules, that are always in constant motion, even when in a solid state.

The kinetic molecular theory of matter helps in explaining the properties of matter and how it relates to the molecular structures of matter. According to this theory, the particles that make up matter are in constant motion regardless of their state of matter, and their motion is related to the state of matter they exist in. The theory is divided into three main postulates as follows:1. Matter is made up of tiny particles called molecules that are in constant motion, even when in a solid state.2. The movement of these particles increases with an increase in temperature, resulting in an increase in the kinetic energy of the particles.3.

The collisions between these particles and the walls of the container they are in result in the pressure exerted by the gas. The relationship between heat, energy, and temperature as part of the kinetic molecular theory is as follows:Heat is the transfer of energy between different systems, whereas temperature is the measure of the average kinetic energy of the particles in a system. This means that as heat is transferred into a system, the particles in that system will gain kinetic energy, which will lead to an increase in temperature.

To know more about kinetic molecular visit:

https://brainly.com/question/2180310

#SPJ11

Answer:

long chainlike molecules composed of a series of nearly identical building blocks called nucleotides.

Explanation:

Each nucleotide consists of a nitrogen-containing aromatic base attached to a pentose (five-carbon) sugar, which is in turn attached to a phosphate group.

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.

For more question on energy

https://brainly.com/question/29339318

#SPJ8

The translational correspondence between the mRNA and tRNA molecules is codon and anticodon.

The codon and anticodon of a polypeptide are nucleotide triplets that identify an individual amino acid. Genetic information must be stored as a nucleotide sequence on DNA or mRNA molecules in a specific way to build proteins. That particular set of rules is known as the genetic code. A codon is a grouping of three nucleotides, most frequently found on mRNA. Anticodons are found in tRNA molecules.

The main difference between a codon and an anticodon is that a codon isae language used to represent an amino acid on mRNA molecules, whereas an anticodon is the complementary nucleotide sequence of the codon on tRNA molecules.

Learn more about codon, anticodon at

https://brainly.com/question/19535415?referrer=searchResults

#SPJ4

No approximations or assumptions need to be made in the calculation of the pH and the tartrate ion 1C4H4O6 2-2 concentration for a 0.250 M solution of tartaric acid.

The pH and the tartrate ion 1C4H4O6 2-2 concentration of a 0.250 M solution of tartaric acid can be calculated using the acid-dissociation constants and the Henderson-Hasselbalch equation. The acid-dissociation constants (Ka1 and Ka2) of tartaric acid are 1.14x10-2 and 5.01x10-5, respectively.

The pH of the solution can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([base]/[acid]) where [base] is the concentration of the conjugate base (the tartrate ion) and [acid] is the concentration of the acid (tartaric acid). Since the solution is 0.250 M in tartaric acid, [acid] = 0.250 M and [base] = 0.250 M - [tartrate ion], which can be calculated using the Ka1 and Ka2 values.

For Ka1, the tartrate ion 1C4H4O6 2-2 concentration can be calculated as 0.250 M - 0.250 * 1.14x10-2 = 0.249 M. For Ka2, the tartrate ion 1C4H4O6 2-2 concentration can be calculated as 0.250 M - 0.250 * 5.01x10-5 = 0.249 M.

Using the Henderson-Hasselbalch equation, the pH of the solution can be calculated as pH = pKa + log([base]/[acid]). The pKa values of tartaric acid are 3.92 and 5.63 respectively. Therefore, for Ka1, the pH of the solution can be calculated as pH = 3.92 + log(0.249/0.250) = 3.91, and for Ka2, the pH of the solution can be calculated as pH = 5.63 + log(0.249/0.250) = 5.63.

No approximations or assumptions need to be made in the calculation of the pH and the tartrate ion 1C4H4O6 2-2 concentration for a 0.250 M solution of tartaric acid, as the Henderson-Hasselbalch equation and the acid-dissociation constants of tartaric acid can be used.

Learn more about Tartaric acid: brainly.com/question/24178503

#SPJ11

Temperature is 273 Kelvin and pressure is 1 bar.

Given - 10 mol of gas at STP

Temperature = ?

Pressure = ?

STP -  STP or Standard Temperature and Pressure, refers to the nominal atmospheric conditions at sea level. 0 degrees Celsius and 1 atmosphere are the respective temperatures and pressures. The STP value is essential for physicists, chemists, engineers, pilots, and navigators in addition to other specialists.

In order to report on the qualities of matter, standard conditions for temperature (T) and pressure (P) relate to a certain temperature and pressure. STP values are frequently applied in gas experiments.

STP was previously defined as follows by the International Union of Pure and Applied Chemistry (IUPAC):

It is 0 degrees Celsius outside (273.15 degrees Kelvin or 32 degrees Fahrenheit)

One atmosphere (101.325 kilopascal or 760 Torr)

This usage of the term has been dropped. However, the definition of the volume (V) term normal cubic meter continues to be often employed under these circumstances. The IUPAC has used a stricter definition of STP since 1982:

Absolute pressure: 105 Pa or 100,000 pascals (1 bar, 14.5 pounds per square inch, 0.98692 atm).

Hence, Temperature is 273 Kelvin and pressure is 1 bar at STP.

To learn more about STP refer - https://brainly.com/question/27100414

#SPJ9

Answer:

B

Explanation:

well heterogenous mixtures are not uniformly distributed these meaning whatever components are "mixed" can be seperated easily

a example of this can be

Soil, oil in water, ice in water

while Homogeneous mixture cannot be seen seperated

Answer: B. Its components are unevenly distributed.

Explanation:

The correct answer to the first part of your question is option (c): Energy is released by water vapor as it condenses.

When water vapor condenses into liquid water, it undergoes a phase change from a gaseous state to a liquid state. During this phase change, energy is released in the form of latent heat. This release of energy occurs because the water molecules in the vapor phase are more energetic and have higher kinetic energy compared to the water molecules in the liquid phase.

To know more about latent heat

brainly.com/question/23976436

#SPJ11

Answer:

Explanation:

As the redeposited minerals build up after countless water drops, a stalactite is formed. If the water that drops to the floor of the cave still has some dissolved calcite in it, it can deposit more dissolved calcite there, forming a stalagmite.

Answer:

This symbol indicates that hazardous products with this pictogram can cause certain health effects for example, skin irritation, eye irritation, and/or. skin sensitization.

Explanation:

Answer:

ν ≈ 4.7 × 10¹⁴ Hz

General Formulas and Concepts:

Chem

Speed of Light = Wavelength times Frequency

Explanation:

Step 1: Define

λ = 6.4 × 10⁻⁷ m

Step 2: Solve for ν

3.0 × 10⁸ = 6.4 × 10⁻⁷ · ν

ν = 4.6875 × 10¹⁴ Hz

Step 3: Check

We are given 2 sig figs. Follow sig fig rules.

4.6875 × 10¹⁴ Hz ≈ 4.7 × 10¹⁴ Hz

Answer:

The answer to that question is 24 AMU.

Explanation:

I know this because i got the answer correct on the quiz. To get the average, you just add the 4 atomic masses given to you together then divide by 4.

Answer:

Silicon has a very high melting point due to its giant covalent structure; a lot of energy is needed to break the strong covalent bonds throughout the structure.

Explanation:

Answer:

The noble gases are relatively nonreactive. In fact, they are the least reactive elements on the periodic table. This is because they have a complete valence shell. They have little tendency to gain or lose electrons.

Explanation:

The final equilibrium temperature of the copper and water is 38.7°C. The further explanation is shown below.

To find the final equilibrium temperature of the copper and water, we need to use the equation for calculating heat transfer. The equation is as follows:

Q = mcΔT

Where Q is the heat transferred, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature. In this case, we need to find the heat transferred by the copper and the heat absorbed by the water.

For the copper, the heat transferred (Q) is equal to the mass of the copper (m) times the specific heat capacity of copper (c) times the change in temperature (ΔT). The specific heat capacity of copper is 0.385 J/g°C, and the change in temperature is 100°C - 30.0°C = 70.0°C. Therefore, the heat transferred by the copper is equal to 0.385 J/g°C * 230 g * 70.0°C = 13,705 J.

For the water, the heat absorbed (Q) is equal to the mass of the water (m) times the specific heat capacity of water (c) times the change in temperature (ΔT). The specific heat capacity of water is 4.184 J/g°C, and the change in temperature is the final equilibrium temperature - the initial temperature of the water, which we don't know yet. We'll call the final equilibrium temperature T. Therefore, the heat absorbed by the water is equal to 4.184 J/g°C * 340 g * (T - 30.0°C) = 1457.6T - 44152 J.

Since the total heat transferred must be equal to the total heat absorbed, we can set the two equations equal to each other and solve for T. This gives us 13,705 J = 1457.6T - 44152 J. Solving for T, we find that the final equilibrium temperature is equal to T = (13705 J + 44152 J) / 1457.6 = 38.7°C.

Therefore, the final equilibrium temperature of the copper and water is 38.7°C.

Learn more about temperature, here https://brainly.com/question/11464844

#SPJ4