Ms. Sharkey wanted to see which tennis shoes made her run the fastest. She bought
a pair of Brooks, Adidas, and Nike and ran a mile in each to see which one gave her
the shortest time and recorded the data. What is her next step?

Answers

Answer 1

Answer:

to compare the data she has got?


Related Questions

7. What happen if we don't have water?

Answers

Answer:

our bodies will dehydrate causing us to die a dreadfully excruciating painful death

What mass of neon gas is required to fill a 5.00-L container to
a pressure of 1.02 atm at 25 °C?

Answers

Answer:

[tex]m=4.21g[/tex]

Explanation:

Hello,

In this case, by using the ideal gas equation:

[tex]PV=nRT[/tex]

We can compute the mass of neon gas at the given conditions by firstly computing the moles and also considering the temperature in kelvins (298K):

[tex]n=\frac{PV}{RT}=\frac{1.02atm*5.00L}{0.082\frac{atm*L}{mol*K}*298K}\\ \\n=0.209mol[/tex]

Finally, by using the atomic mass of neon gas (20.18g/mol) we compute the required mass to fill the 5.00-L container:

[tex]m=0.209mol*\frac{20.18g}{1mol}\\ \\m=4.21g[/tex]

Best regards.

The mass of neon gas will be "4.21 g".

Ideal Gas Equation:

Given:

Pressure, P = 1.02 atmVolume, V = 5.00 LTemperature, T = 25°C or 298 K

By using Ideal Gas Equation,

⇒ [tex]PV = nRT[/tex]

or,

⇒    [tex]n = \frac{PV}{RT}[/tex]

By substituting the values,

         [tex]= \frac{1.02\times 5.00}{0.082\times 298}[/tex]

         [tex]= 0.209 \ mol[/tex]

hence,

The Mass will be:

= [tex]0.209\times \frac{20.18}{1}[/tex]

= [tex]4.21 \ g[/tex]

Thus the above answer is right.

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Element T exists as three isotopes: T-12 (98.90%), T-13 (1.00%) and T-14 (0.10%). Calculate the
average atomic mass of the element T.
Answer choices:
- 12.01 amu
- 11.72 amu
- 1200 amu
- 13 amu

Answers

Answer:

-10.00amu

ok.......... !!!!!

The average atomic mass of the element T is 12.012 amu.

What is average atomic mass?

The average atomic mass is defined as the atoms' weighted average mass in a naturally occurring sample of the element.

It is also defined as the average atomic mass of all naturally occurring isotopes of all elements.

The average atomic mass  can be expressed as

Average atomic mass = f1m1 + f2m2 + f3m3

                                    = 0.989 x 12 + 0.01 x 13 + 0.001 x 14

                                    = 11.868 + 0.13 + 0.014

                                    = 12.012 amu

Thus, the average atomic mass of the element T is 12.012 amu.

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Which of the following are false about Prokaryotic Transcription termination?
A. It can occur in a factor dependent fashion.
B. It can occur in a factor independent fashion.
C. It may involve Rho protein.
D. none of the above.

Answers

Answer: none of the above

Explanation:

In Prokaryotic Transcription termination, it should be noted that the RNA polymerase transcribes through a terminator sequence, which in turn results in the polymerase to be separated from the DNA and thereby leads to its release of the transcrip.

Prokaryotic Transcription termination can occur in a factor dependent fashion, can occur in a factor independent fashion and may involve Rho protein.

Therefore, none of the options is false.

An outside thermometer reads 57°F. What is this temperature in °C? Round your answer to the nearest whole number.

Answers

1. subtract 32 from 57 (57-32)

2. multiply 5/9 by (57-32)

3. equation: (57-32)×5/9

Answer:

14°C

Explanation:

Temperature is the degree of hotness or coldness of an object. It is measured using an instrument called THERMOMETER. There are different units of measuring temperature which are interconvertible. The units are Fahrenheit (°F), Celsius (°C), Kelvin (K) etc.

Please give me some answers not all and I’ll give points

Answers

Answer:

B) pH of water is independent. A) Number of tadpoles is dependent

Explanation:Because the pH can kill fish

what would happen to the solvent if a reaction was refluxed without a condenser​

Answers

Answer:

Solvent will be lost as gas and not return into the vessel via condensation.

Explanation:

Reflux is a technique used in chemistry to boil a particular solvent and convert the gas formed back into liquid by condensation. This technique allows a solvent to be heated at a regulated temperature but for a prolonged period of time than it would normally take place.

The reflux procedure makes use of a reflux CONDENSER, which is an apparatus that allows vapour from the heating/boiling to flow back into the reaction vessel. The CONDENSER functions to prevent the loss of the SOLVENT as vapour by providing a cooling effect on the vapour.

Therefore, if a reaction was refluxed without a condenser, THE SOLVENT WILL BE LOST AS VAPOUR

example for Conceptual

Answers

Answer:

The definition of conceptual is something having to do with the mind, or with mental concepts or philosophical or imaginary ideas. An example of conceptual is when you formulate an abstract philosophy to explain the world which cannot be proven or seen. "Conceptual."

Explanation:

How does accuracy and precision impact your life

Answers

Explanation:

Accuracy refers to the closeness of a measured value to a standard or known value. For example, if in lab you obtain a weight measurement of 3.2 kg for a given substance, but the actual or known weight is 10 kg, then your measurement is not accurate. In this case, your measurement is not close to the known value.

Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3.2 kg each time, then your measurement is very precise. Precision is independent of accuracy. You can be very precise but inaccurate, as described above. You can also be accurate but imprecise.

For example, if on average, your measurements for a given substance are close to the known value, but the measurements are far from each other, then you have accuracy without precision.

A good analogy for understanding accuracy and precision is to imagine a basketball player shooting baskets. If the player shoots with accuracy, his aim will always take the ball close to or into the basket. If the player shoots with precision, his aim will always take the ball to the same location which may or may not be close to the basket. A good player will be both accurate and precise by shooting the ball the same way each time and each time

Phil has to put the greatest number of apples and oranges in each box so each box has the same number of apples and oranges. Should Phil use the greatest common factor (GCF) or the least common multiple (LCM) to solve the problem

Answers

Answer:

GCF

Explanation: Your question says "The GREATEST number of apples and oranges" Key word is "greatest".

Select the meaning of the word sign that best
describes this image.
O to write as a signature
P
a gesture used to express an idea
O an object that conveys meaning
O a symbol used to abbreviate words






WHAT IS ITRT

Answers

Answer:

an object that conveys meaning

Explanation:

Answer:

c

Explanation:

2. Condensation appears on a water glass, did this water just appear? Explain.

Answers

Answer:

When water vapor in the air comes into contact with something cool, such as the outside of a cold glass of water, its molecules slow down and get closer together. When that happens, the gaseous water vapor turns back into liquid water droplets. That's condensation.

convert 13.4 degrees celcius into kelvin​

Answers

Answer:

286.55K

Explanation:

To convert to kelvin , add 237 .15

[tex]13.4\°C + 273.15 = 286.55K[/tex]

Answer:

13.4 degrees celsius =

286.55 kelvins

Temperature

13.4

Celsius

286.55

Kelvin

Formula

13.4°C + 273.15 = 286.55K

Explanation:

HOPE THAT HELPS YOU

Convert 0.0017hL into mL

Answers

Answer:

170ml

Explanation:

multiply the volume value by 100000

Which of the following gases is the least soluble in water and why? CO2, SO3, N2, NH3, HCl.

Answers

Answer:

SO3

It has the highest molar mass value and thus would be the least soluble

Explanation:

In this question, we want to know which of the gases is the least soluble in water.

The easiest way to do this is to calculate the molar masses of these gases. The gas with the highest molar mass is the heaviest and thus will be the least soluble in water

For CO2 - molar mass is 44 g/mol

For SO3- molar mass is 80 g/mol

For N2- molar mass is 28g/mol

For NH3-molar mass is 17g/mol

For HCl- molar mass is 36.5 g/mol

From the molar masses, we can see that the molar mass of the ammonia gas is the lightest and thus, it is the most soluble.

The mass of the sulphur vi oxide is the highest and thus it is the heaviest and the least soluble in water

Which best justifies the accuracy of the claim?

Answers

Answer:

A

Explanation:

the 2nd artical is against global warming while the first one uses scientific evidence

Find the reagent to sythesize 1- phenyl-1-propanol
Starting Material: Ethyl−MgBr and Benzaldehyde
Solvent:
EtOH

Answers

Answer:

aqueous acid is used as a reagent.  

Explanation:

Addition of Grignard reagent in aldehyde and followed by the acidification give rise to the primary or secondary alcohol. when the formaldehyde is used than the primary alcohol is formed otherwise secondary alcohol is formed.

in this reaction we also use the aqueous acid for the acidification as a reagent. We add aqueous acid when ethanol is present. This is because ethanol is get converted in the presence of aqueous acid into the chloroethane.  

Express 2.99 x 108 m/s (the speed of light) in decimal notation (i.e., express the

number without using scientific notation

Answers

Answer:

speed of light = 299,000,000 m/s

Explanation:

The speed of light in vacuum, denoted as c,  is a universal physical constant which unlike space and time, is independent of the observer. It is a constant that is important in many fields of science. Its exact value is given as 299,792,458 metres per second.

In scientific notation, it is approximately given as 2.99 x 10⁸ metres per second.

2.99 x 10⁸ metres per second = 2.99  x 100000000 = 299,000,000 m/s

Therefore, when expressed in decimal notation, the speed of light = 299,000,000 m/s.

which two models would be most useful in predicting weather​

Answers

Answer:mathematical and map

Explanation:

mathematical and map

Explanation:

The number of ATP molecules produced during the anaerobic phase of cellular respiration is _______

2
8
16
32

Answers

Answer:

The number of ATP molecules produced during the anaerobic phase of cellular respiration is 32 ATP.

Explanation:

Actually it's 36 ATP

8 from glycolysis

6 from pyruvate

24 from Krebs cycle

So total are 38 ATP but 2 ATP are consumed during glycolysis so total will be 36.

Using the mmoles of (35)-2,2,-dibromo-3,4-dimethylpentane calculated earlier and the molecular weight of the product (962 g/mol). Predict the theoretical 1 0096 yield of the product in grams. Round to the hundredths place.

Answers

Answer:

The yield of the product in gram is [tex]\mathsf{{w_P}=0.26 \ gram}[/tex]

Explanation:

Given that:

the molecular mass weight of the product = 96.2 g/mol

the molecular mass of the reagent (3S)-2,2,-dibromo-3,4-dimethylpentane is 257.997 g

given that the millimoles of the reagent = 2,7 millimoles = [tex]2.7 \times 10^{-3} \ moles[/tex]

We know that:

Number of moles = mass/molar mass

Then:

[tex]2.7 \times 10^{-3} = \dfrac{ mass}{257.997}[/tex]

[tex]mass = 2.7 \times 10^{-3} \times 257.997[/tex]

mass = 0.697

Theoretical yield = (number of moles of the product/ number of moles of reactant) × 100

i.e

Theoretical yield = [tex]\dfrac{n_P}{n_R}\times 100\%[/tex]

where;

[tex]n_P = \dfrac{w_P}{m_P}[/tex]    and [tex]n_R = \dfrac{w_R}{m_R}[/tex]

Theoretical yield = [tex]\dfrac{(\dfrac{w_P}{m_P})}{(\dfrac{w_R}{m_R})} \times 100\%[/tex]

Given that the theoretical yield = 100%

Then:

[tex]100\% =\dfrac{(\dfrac{w_P}{m_P})}{(\dfrac{w_R}{m_R})} \times 100\%[/tex]

[tex]\dfrac{w_P}{m_P}=\dfrac{w_R}{m_R}[/tex]

[tex]{w_P}=\dfrac{w_R \times m_P}{m_R}[/tex]

where,

[tex]w_P[/tex] = derived weight of the product

[tex]m_P =[/tex]the molecular mass of the derived product

[tex]m_R =[/tex] the molecular mass of the reagent

[tex]w_R[/tex] = weight in a gram of the reagent

[tex]{w_P}=\dfrac{w_R \times m_P}{m_R}[/tex]

[tex]{w_P}=\dfrac{0.697 \times 96.2}{257.997}[/tex]

[tex]\mathsf{{w_P}=0.26 \ gram}[/tex]

Paul determines that the hydrogen ion concentration of his unknown solution is 3.60×10^-5 M. what is the pH of this solution?​

Answers

Answer:

pH = 4.44

Explanation:

The pH of a substance can be found by using the formula

[tex]p H = - log[ H^{ + } ][/tex]

where [ H+ ] is the hydrogen ion concentration of the solution

From the question

[ H + ] = 3.60 × 10^-5 M

So the pH is

[tex]pH = - log(3.60 \times {10}^{ - 5} ) \\ =4.44369749923[/tex]

We have the final answer as

pH = 4.44

Hope this helps you

Which technology has helped improve scientists’ ability to gather scientific data about the movement of sea turtles? satellite tracking thermometers probeware microscopes? ​

Answers

Answer:either satellite tracking or probware.

Explanation:probate. Think its satalite tracking hope this helps.

Answer:

its satellite tracking

Explanation:

i got it right on edge

How did incorporation of the Bill of Rights affect state governments​

Answers

Answer:

The effect of the incorporation of the bill of rights was that state governments were required to provide most bill of rights protections.

Explanation:

A submarine took 9 hours to complete a journey. For the first 5 hours, it traveled at an average speed of 106km/h. For the rest of the journey, it traveled at an average speed of 125km/h. What was the total distance of the journey?

Answers

The correct answer is 1030 km

Explanation:

The distance a body such as a submarine travels depends on two main variables the time of the movement and the speed. Indeed, to calculate the distance it is possible to use the formula d = s x t. The process to calculate the distance of the submarine journey is shown below:

Distance in the first part of the journey:

It is known during the first part of the journey the submarine traveled 5 hours at a speed of 106 km/h

Distance = speed × time

D = 106 km/h × 5 h

D = 530 km

Distance in the second part of the journey:

During the remaining 4 hours (the first part took 5 hours and the total time traveled were 9 hours) the speed was 125km/h. Now, let's calculate the distance covered during this part of the journey

Distance = speed × time

D= 125 km/h × 4 h

D= 500 km

Total distance:

Finally, add both distances to know the total distance

530 km + 500 km = 1030 km

An element is an arrangement of atoms in a particular way; True or False?

Answers

Answer:

i think it's true because An element is a substance that is made entirely from one type of atom

Look at the list of wealthy Americans under the heading “Half a Billion Back of M'Kinley."
What were the two most common industries of the business leaders on
this list?
manufacturing and carpets
banking and railroads
o jewelry and transportation

Answers

Answer:

banking and railroads

Explanation:

The  two most common industries of the business leaders on this list are banking and railroads.

What are industries?

Industry is a group of productive enterprises or organizations that produce or supply goods, services, or sources of income. In economics, industries are generally classified as primary, secondary, tertiary, and quaternary; secondary industries are further classified as heavy and light.

Primary industry sector of a nation’s economy includes agriculture, forestry, fishing, mining, quarrying, and the extraction of minerals. It may be divided into two categories: genetic industry, including the production of raw materials that may be increased by human intervention in the production process; and extractive industry, including the production of exhaustible raw materials that cannot be augmented through cultivation.

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Which common item is made from copper?

soap
coins
baby powder
colored pencils

Answers

Coins just like pennies

Answer:

coins

Explanation:

How does the arrangement of atoms differ in crystals and glass?

Answers

crystals have well organized arrangement of atoms. non crystals have irregular unorganized arrangement of atoms :)

How does the arrangement of atoms differ in a crystalline and a noncrystalline substance? Crystals have well organized arrangement of atoms. Non crystals have irregular unorganized arrangement of atoms. You just studied 13 terms!

KCl is an ionic salt with a formula weight of 74.54 g/mole. A 1.417 M (mole/liter) KCl solution has a density of 1064.5 grams/liter at 20.0 OC. Use the Molarity and the formula weight to find the mass (g) of salt in one liter. Then, find the mass (g and kg) of water in one liter of the solution as the difference between the solution mass and the KCl mass. Include the conversion factor. Determine the molality (m), or moles of salt per kg of water, by dividing the moles of salt in one liter by the kg of water in one liter. Show all units and use proper significant figures. (

Answers

Answer:

Mass of the salt:  105.6g of KCl.

Mass water: 958.9g of water.

Molality: 1.478m.

Explanation:

Mass of the salt:

In 1L, there are 1.417 moles. In grams:

1.417 moles KCl * (74.54g / mol) = 105.6g of KCl

Mass of the water:

We can determine the mass of solution (Mass of water + mass KCl) by multiplication of the voluome (1L and density 1064.5g/L), thus:

1L * (1064.5g / L) = 1064.5g - Mass solution.

Mass water = 1064.5g - 105.6g = 958.9g of water

Molality:

Moles KCl = 1.417 moles KCl.

kg Water = 958.9g = 0.9589kg.

Molality = 1.417mol / 0.9589kg = 1.478m

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