Mr. Stark thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Mr. Stark counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.

Identify the independent variable and dependent variable

Identify the control group and experimental group

Answers

Answer 1

Explanation:

taking a special juice independent variable

the number of stuck of paper dependent variable

the control group is group B

experimental group is Group A

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Related Questions


If 10 milliliters of liquid has a mass of 70 grams, what is its density?
O 7 g/mL
70 g/mL
0.7 g/mL
700 g/mL

Answers

Answer:

The answer is 7 g/mL

Explanation:

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

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 70 g

volume = 10 mL

We have

[tex]density = \frac{70}{10} \\ [/tex]

We have the final answer as

7 g/mL

Hope this helps you

What are the three was main States of matter?

Answers

Answer:

liquid, solid, gas

Explanation:

Solid, Liquid and gaseous

There are 5 states of matter

1.) Solid

2.) Liquid

3.) Gaseous

4.) Plasma

5.) Bose Einstein

the First three are main

Solution ,colloid ,or suspension

Answers

Answer:

colloid

Explanation:

i think she making meth in her basement

Colloid lol that woman is crazy

6. Would a short-term or long-term change allow for an adaptation?

Answers

Answer:

long term change

Explanation:

because it takes time

where are the electrons found in Bohrs atomic model

Answers

Answer:

Explanation

In the Bohr model of the atom, electrons travel in defined circular orbits around the nucleus. The orbits are labeled by an integer, the quantum number n. Electrons can jump from one orbit to another by emitting or absorbing energy.

why sodium is active element...​

Answers

Answer:

here is your answer

Explanation:

1. sodium sodium is very reactive metal

2. when it exposed in air it automatically form Na2O.

3. when when it put in water it reacts visoroustly and start burning on water.

( due to this it is called active element)

The other answer here is correct, but if you’re looking from a more structural view then here is it:
Sodium has only one electron it it’s outermost orbital, and because of this it has a really high tendency In giving up that electron in order to get into a more stable electron configuration.

Explain how an oil spill devastates marine life when animals get covered by the toxic sludge

Answers

Answer:

It poisons animals, it coats reefs, and damages ecosystems.

Explanation:

It is the same principle with humans. If we drink oil ( the actual stuff from for example, Spindletop) we would get poisoned, and die. If we eat toothpaste over and over, we have to go to poison control so they can pump your stomach. If we drink cyanide, we will die. If we get poison in our food, we will either starve, try to fix it, or we get poisoned and die. If we were some fish, we might not be able to fix the water, so we starve, or we get poisoned.

It is the same lines as the animals, our pollution and oil floods our environment and we start to die.

Sponsered by: STAF

Save the Animals Foundation

Hope this helps!

I was kidding about the sponsership.

Answer:It is the same principle with humans. If we drink oil ( the actual stuff from for example, Spindletop) we would get poisoned, and die. If we eat toothpaste over and over, we have to go to poison control so they can pump your stomach. If we drink cyanide, we will die. If we get poison in our food, we will either starve, try to fix it, or we get poisoned and die. If we were some fish, we might not be able to fix the water, so we starve, or we get poisoned.It is the same lines as the animals, our pollution and oil floods our environment and we start to die.

Explanation:

All cells share certain functions necessary for life. Which of the following is not a function performed by every cell?

Answers

Answer:

there is no following so there isnt a answer

Explanation:

What is the mass of 0.042 mole C8H18

Answers

Hope this help you!!! :))

The mass of  C8H18 is 4.788g

In chemistry,

The number of moles of a compound is given as Mass/ Molar mass

For C8H18, The molar mass will be calculated as

C8H18=12 x 8 +1 x 18=96+18=114 g/mol

Putting the value in the equation

Number of moles= Mass/Molar mass

0.042moles =Mass/ 114g/mol

Mass=0.042 x 114=4.788g

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newto 's first law of motion states than an object motion will not change unless blank ​

Answers

newton's first law of motion states than an object motion will not change unless subjected to an external force.

What does an atomic number represent in an atom?


A) number of electrons


B) number of protons


C) number of protons and neutrons


D) number of neutrons

Answers

Answer:

C, number of protons and neutrons

2 Which thing has the most mass?
O marble
elephant
O fork
Obaseball

Answers

Explanation:

marble is the correct answer

Answer:

Elephant

Explanation:

An elaphant is the option with the most mass.

Hope this helps! Please makr brainliest! Stay safe, God bless and happy studying!

Match each tool on the left with its most likely use on the right by choosing the correct number. ruler scale telescope thermometer microscope 1. Measuring the weight of an apple 2. Studying a distant object 3. Studying a very small object 4. Measuring the length of a book 5. Measuring the temperature of a cup of tea

Answers

Answer:

1. Measuring the weight of an apple- scale.

2. Studying a distant object- telescope.

3. Studying a very small object- microscope.

4. Measuring the length of a book- ruler.

5. Measuring the temperature of a cup of tea- thermometer.

Explanation:

1. A scale or measuring scale is used to measure or take the weight of any object. It can be either an analog or digital scale as long as the measurements can be taken from it. So, measuring the weight of an apple can be done on a measuring scale.

2. A telescope is an instrument that is used in scientific, especially in space explorations, to study a distant object in the universe/ sky. It gives a clear image and enables a person to view things closer than they are. So, a telescope can be used to study distant objects.

3. A microscope is used to study very different small objects, such as microbes and other organisms. It enlarges the objects to be viewed and thus, enables them to be studied in detail.

4. A ruler may be used to measure the length of a book. It has indications or marks by which the lengths can be taken.

5. A thermometer is an instrument that is used to measure the temperature of anything, be it a person or even other things such as food and even a cup of tea.  

Answer:

Match each tool on the left with its most likely use on the right by choosing the correct number.

4

ruler

1

scale

2

telescope

5

thermometer

3

microscope

Explanation:

Which of the following statements is most accurate?
A. When liquid water is heated, the molecules move faster.
B. When liquid water is heated, the molecules collide more often.
C. When liquid water is heated, collisions between molecules are more violent.
D. All of the above.

Answers

Answer:

D: All of the above

Explanation:

It's all of the above, they are all pretty similar to the accurate answer.

Answer:

D

Explanation:

If Neon atom has 10 protons and 12 neutrons, what would be this
Atom's mass number?

Answers

Answer:

Hmmmm,   Z=10   the element is not fluorine, and its not sodium.

Explanation:

If you are doing your chemistry homework, you must have a Periodic Table beside you. You will also be supplied a Periodic Table in every test in Chemistry and Physics you will ever sit. So get your Periodic table, and consider the following. It has 10 electrons, 10 fundamental negative charges. Since the element is neutral, it has 10 fundamental positive charges, 10 protons, in its nucleus. In the nucleus there are also 12 massive, neutral particles, 12 neutrons. The number of protons,  Z, defines the atomic number, and the Periodic Table is arranged according to  Z.

.

A cake recipe calls for 0.75 kg of butter. How many grams of butter would be needed for 4 cakes

Answers

Answer:

So if you divide the kg of butter and the cake that will be your answer and then you should have a fraction so the fraction would be 0.25 over 2 because you simplified it. 0.25/2

Explanation:

Now what we've found the volume, let's take a look at the mass. We didn't tare, or zero, the scale before pouring in the fluid. If the value on the scale immediately before pouring in the fluid read 80.1g, what is the mass of the fluid?

A. 86.5 g

B. 246.7 g

C. 116.5 g

Answers

Answer:

a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Does anybody know this question

Answers

30 feet/sec

Hope this helped!

Which of the following is a molecular formula?

MgCl₂
Al₂O₃
NO₂
CaO

Answers

Answer:

The molecular formula of a compound may be the empirical formula, or it may be a multiple of the empirical formula. For example, the molecular formula of butene, C4H8, shows that each freely existing molecule of butene contains four atoms of carbon and eight atoms of hydrogen. Its empirical formula is CH2.

Explanation:

Which statement describes potential energy?
A energy of motion
B.stored energy
C energy due to heat
D. used energy

Answers

Answer:

B. stored energy

hope this helps!!


Were any scientific investigations conducted for proposing the theory? Was this theory tested or simply expected?

Answers

Answer: Yes

Explanation:

Scientific theory can be defined as the solutions to the problems of the queries related to natural phenomena or it is the explanation for different aspects of the natural world. It is done with repeated testing procedure. To prove the facts of the theory, repeated experimental tests, and observations are done. The theories are tested under the controlled conditions of the experimental set up.

On the basis of the above description, we can say that the scientific investigations are done in the form of experimentation trials before proposing  a theory. The theory is tested and is not simply expected.

Answer: Yes, Clements compared ecological succession with the development of organisms. Yes, this theory was tested.

Explanation:

The atoms of liquid Mercury are

Answers

Mercury atoms have 80 electrons and 80 protons with 122 neutrons in the most abundant isotope. Under standard conditions mercury is a shiny, heavy, silvery liquid. It is the only metal that is liquid at room temper

Answer: close together, moving around one another.

Explanation: to study island answer

hope this helps!!!

What happens to the oxygen and carbon dioxide as we breathe

Answers

Answer:

Your lungs deliver oxygen and remove carbon dioxide from your blood in a process called gas exchange. Gas exchange happens in the capillaries surrounding the alveoli, where the oxygen that is breathed in enters the circulatory system and carbon dioxide in the blood is released to the lungs and then breathed out.

Your lungs deliver oxygen And remove carbon dioxide from your blood in a process called gas exchange. Gas exchange happens in the capillaries surrounding the alveoli, where the oxygen that is breathed in enters the circulatory system and carbon dioxide in the blood is released to the lungs and then breathed out. ^^^^

If an electron is transferred from A to B in the chemical reaction shown here,
what molecule has been reduced?
AB
A+
A
B

Answers

if an electron is passed from Ago B then Slides electrons which makes it electropositive i.e A+

According to the redox reactions , when an electron is transferred from A to B , B molecule has been reduced as it gains electrons.

What are redox reactions?

Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.

While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.

The ion or molecule which accepts electrons is called as oxidizing agent while the ion or molecule which donates electrons is called as a reducing agent.

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please help me quickly ​

Answers

Answer: 2

Explanation:

Answer:

It is two

Explanation:

Pilots of hot air balloons are able to steer them somewhat by moving them up or down to enter different air currents that move in different directions. Explain how the flame can be used to do that.

Answers

Answer:

To understand this first we must understand what is happening at the molecular level. When we heat any substance it changes its state of matter because its molecules get excited. For example, when we heat water it turns into gas so the molecules get excited. The hot air balloon will move faster if we add heat because the gas molecules will get excited and push against the balloon, making it faster. If we start removing heat, the balloon's acceleration will slow down because the molecules will get less excited.

Hot air balloons flies by means of it being lighter than air

The flame can be used to move the pilot to different directions by increasing the temperature of the air in the balloon and therefore, the volume, therefore, decreasing the density of the air which changes the elevation of the balloon to the appropriate elevation having winds moving in the desired direction

The principle by which the above process works is as follows:

According to Charles law, the volume of a mass of gas is directly proportional to its Kelvin temperature

V ∝ T

[tex]\dfrac{V_1}{T_1} = \dfrac{V_2}{T_2}[/tex]

[tex]V_2 = T_2 \times \dfrac{V_1}{T_1}[/tex]

[tex]Density, \rho = \dfrac{Mass, \ m}{Volume, \ V}[/tex]

Therefore, as the temperature is increased, the volume occupied the mass gas increases, and therefore, the density decreases

The principle on which the hot air balloon operates on is the principle that hot air is less dense than and therefore, rises above cool air

Therefore, the pilot of an hot air balloon heats up the air in the balloon to allow the balloon to rise and the pilot switches off the burner so that the air in the balloon cools and the balloon looses altitude

The mechanism of the hot air balloon does not have a steering, and therefore, the wind direction is used to steer the balloon

The direction of the wind is different at different altitude, such that by obtaining the direction of the wind at a given altitude, the pilot can raise or lower the balloon up or down to the altitude having the desired wind direction, by increasing the temperature of the air in the balloon by switching on the burner to go to a higher altitude, or by switching off the burner so the air in the balloon cools and the balloon loses some of its altitude to reach the wind going in the direction of the pilot

Learn more about hot air balloon here:

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first 30 elements with their atomic mass​

Answers

A few important ones........

Hydrogen - H - 1 - 1

Helium - He - 2 - 4

Lithium - Li - 3 - 7

Berelium - Be - 4 - 9

Boron - B - 5 - 11

Carbon - C - 6 - 12

Nitrogen - N - 7 - 14

Oxygen - O - 8 - 16

Fluorine - F - 9 - 19

Neon - Ne - 10 - 21

Sodium - Na - 11 - 23

Magnesium - Mg - 12 - 24

Aluminium - Al - 13 - 27

Silicon - Si - 14 - 28

Phosphorous - P - 15 - 31

Sulfur - S - 16 - 32

Chlorine - Cl - 17 - 35.5

Argon - Ag - 18 - 36

Potassium - K - 19 - 39

Calcium - Ca - 20 - 40

Scandium - Sc - 21 - 45

Vanadium - Vn - 22 - 48

Titanium - Ti - 23 - 51

Vanadium - Vn - 24 - 52

Manganese - Mn - 25 - 55

Iron - Fe - 26 - 56

Cobalt - Co - 27 - 59

Nickle - Ni - 28 - 59

Copper - Cu - 29 - 64

Zinc - Zn - 30 - 65

An atom of an element contains 6 protons, 6 neutrons, and 6 electrons. An atom that is a different isotope of this element would contain —
A.
6 protons, 7 neutrons, and 6 electrons.


B.
6 protons, 6 neutrons, and 7 electrons.


C.
7 protons, 6 neutrons, and 6 electrons.


D.
7 protons, 7 neutrons, and 7 electrons.

Answers

Answer:

A

Explanation:

An atom that is a different isotope of a given element would contain 6 protons, 7 neutrons, and 6 electrons. Therefore, option (A) is correct.

What is an isotope?

Isotopes are atoms of an element that contain the same atomic number as the original element but a different atomic mass. Isotopes of an element possess the same number of electrons and the number of protons but different numbers of neutrons in their respective nucleus.

For example, the isotopes of carbon are carbon-14, carbon-13, and carbon-12. Carbon-14 has a total of 8 neutrons, carbon-13 have a total of 7 neutrons, and carbon-12 has a total of 6 neutrons. So all the isotopes of carbon have different numbers of neutrons.

Given element has 6 protons, 6 neutrons, and 6 electrons. So the isotope of this element will have  6 protons, and 6 electrons but not 6 neutrons. Therefore, the element with 6 protons, 7 neutrons, and 6 electrons is the isotope of the given element.

Learn more about isotopes, here:

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10. An atom that has 13 protons and 13 electrons is a neutral aluminum (Al) atom. An atom that has 13 protons and 10 electrons is a-​

Answers

Answer:

An atom of Al which has 13 protons and 10 electrons is Al cation (Al⁺³)

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other.

For example,

Al atom has 13 protons and 13 electrons. The number of positive and negative charge is equal thus it will be neutral atom.

While the atom of Al which have 13 proton and 10 electron is not neutral. The positive charge is greater than negative by 3. Which means 3 electrons are lose by Al atom and form cation "Al⁺³".

Thus an atom of Al which has 13 protons and 10 electrons is Al cation (Al⁺³)

Answer:

19

Explanation:

An object starts from rest and exhibits the motion represented by the graph. The object’s average velocity during the 3 second to 5 second time interval is approximately –
8.4 m/s


3.2 m/s


4.8 m/s


.0125 m/s

Answers

Answer:

8.4 m/s

Explanation:

Initial velocity of the object is 0 as it was at rest.

We need to find the object’s average velocity during the 3 second to 5 second.

We can see from the graph that from 3 s to 5 s, the graph is a straight line. If we take the slope we can find the average velocity during the 3 second to 5 second.

Displacement between 3 s to 5 s is :

D = 24.8 m - 8 m = 16.8 m

Time = 5 s - 3 s = 2 s

Now,

Average velocity,

[tex]v=\dfrac{\Delta y}{\Delta x}\\\\y=\dfrac{16.8\ m}{2\ m}\\\\y=8.4\ m[/tex]

So, the object’s average velocity during the 3 second to 5 second is 8.4 m/s.

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