Which is the variable that you are measuring and observing for?
O Dependant Variable
Independant Variable
Constant
O Exponent

Answer:

files  

Explanation:

i had to answer the same question

The statement that Diorite and andesite are composed of similar amounts of feldspars and ferromagnesian minerals. is (a) False.

Diorite and andesite are not composed of similar amounts of feldspars and ferromagnesian minerals. Diorite is a coarse-grained igneous rock composed mainly of plagioclase feldspar, biotite, and hornblende.

It typically contains a higher proportion of ferromagnesian minerals, such as biotite and hornblende, compared to feldspars.

On the other hand, andesite is a fine-grained rock composed mainly of plagioclase feldspar and lesser amounts of hornblende, biotite, and pyroxene. It usually contains a higher proportion of feldspars compared to ferromagnesian minerals.

Therefore, the statement that diorite and andesite are composed of similar amounts of feldspars and ferromagnesian minerals is false.

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The answer is A. factory worker

Answer:

100,000 N

Explanation:

Force, F = mass, m × acceleration, a

⇒F = ma

m= 20, 000kg

a = 5m/s²

∴ F = 5 × 20,000 = 100,000N

Answer:

1. A

2. C

Explanation:

For the first question, we know that the water transformed into a gas. This fact eliminates choices C and D, primarily because they describe the change as "gas to liquid" instead of liquid to gas.

What separates B from A is that B is saying the liquid changed to a gas in response to sunlight, which is completely false and impertinent to the prompt.

A is the correct answer.

for the second question, we know that condensation causes clouds -- and that neither evaporation nor water vapor would clear clouds to make more of them, which eliminates choices B and D. Going back to condensation, the accumulation of water vapor plays a big role in the formation of clouds. While evaporation does play a part in [it] as well, condensation is what caused the sudden appearance of clouds in the troposphere.

C is the correct answer.

Answer:

C: remaining at rest

Explanation:

Acceleration (a) is the change in velocity (Δv), remaining at rest is not changing the velocity.

Answer:

A pure substance consists only of one element or one compound and a mixture consists of two or more different substances, not chemically joined together.

So, a mixture is like mixing - let's say - sugar and rice together (dry BTW), but you can clearly see both substance are not chemically mixed together, if that makes sense. Thus, you can easily separate them out.

The amount of S8 that would be generated, if the yield was 98%, is 47.1 grams.

Mass is a physical body's total amount of matter.

This chemical process is

8H2S + 4O2 = S8 + 8H2O

Moles to ratios

8 mol H₂S: 4 mol O2: 1 mol S8

Calculate the moles of2 5.0 grams of H2S

Molar mass is equal to mass in grams.

H2S molar mass equals 2 x 1 g/mol plus 32.1 g/mol to equal 34.1 g/mol.

25.0 g divided by 34.1 g/mol gives 0.733 moles of H2S.

Moles from 60.0 g of oxygen

O2 molar mass equals 2 x 16 g/mol, or 32.0 g/mol.

60.0 g / 32.0 g = 1.875 moles of oxygen.

State-restricting substance

8 moles of H2S to 4 moles of O2 is equal to 2/1 in theory.

Actual ratio: 0.733 moles of H2S to 1.875 moles of oxygen.

The limiting agent is H2S. (it is consumed completely whilce some O2 remains unreacted).

Find out how many moles of S8 were created from 0.733 moles of H2S.

0.18325 mol S8 is equal to 1 mol S8 / 8 mol H2S x 0.733 mol H2S.

0.18325 mol S to mass conversion

Moles times molar mass equals mass.

in molar mass S8 equals 8 mol x 32.1 g/mol, or 256.8 g/mol.

mass = 256.8 g/mol x 0.18325 mol, or 47.1 grams.

As a result, the S8 weighs 47.1 g.

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It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.

It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;

The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)

Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)

Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).

Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.

Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.

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Answer:

m= 85.7g

V= 32.4mL

d= m/V

d= 2.65g/mL

Answer:

Chloroplasts

Explanation:

Chloroplasts purpose are to take the energy from the Sun's light and turn it into food for the plant.

One example of a naturally occurring radioactive isotope is uranium-238 (U-238).

Uranium-238 (U-238) is a radioactive isotope that exists in nature. Its half-life is approximately 4.5 billion years. U-238 undergoes a decay process called alpha decay, where it emits an alpha particle consisting of two protons and two neutrons. The daughter product of U-238 decay is thorium-234 (Th-234), which is also radioactive with a half-life of about 24 days. Th-234 further decays into protactinium-234 (Pa-234) through beta decay.

The decay chain continues until it reaches a stable isotope, lead-206 (Pb-206). The daughter products of U-238 decay are unstable and undergo further radioactive decay until a stable isotope is reached.

Source: "Uranium-238." Los Alamos National Laboratory, https://periodic.lanl.gov/92.shtml

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Explanation:

The movement of an object involves two forces: the force applied to the body which causes acceleration of the object called kinetic force and the force that opposes it called the friction. These forces are involved in the movement of the book as:

1. When a book is kept on the desk, since no external force is applied to the book therefore the book remains at rest.

2. When the desk is placed in an inclined position, the inclined position causes the sliding of the book but as the book moves down the force of friction increases which causes the book to come at rest. This force of friction is known as the sliding force.

The movement of the book on the table has been attributed to the applied force in the inclined position, while the slowing down of the book's motion contributes to the friction.

Force can be defined as the pressure exerted to produce the motion of the object. The friction has been the stopping force that stops the motion of the object.

The inclination of the table resulted in the application of tangential force to the book, that favors the motion of the object.

The lowering of the table results in the stopping of the motion of the book. The lesser stopping force of the book motion was favored with the frictional force between the book and the table.

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During alpha decay, the process of alpha decay results in the atomic number decreasing by two units.

Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle, which is a helium nucleus.

During alpha decay, the atomic number of the element decreases by two units and the mass number decreases by four units, because an alpha particle has two protons and two neutrons.

The decay of a radioactive element by alpha decay reduces the atomic number by two units and decreases the atomic mass by four units.

Because alpha particles are positively charged helium nuclei with two protons and two neutrons, they contain two fewer electrons than their parent nuclei. The loss of two electrons, or a positive charge of +2, results in a reduction of the atomic number by two units.

Thus, atomic number decreases by 2 units during an alpha decay.

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Answer:

1. H2O is a covalent bond, NaCl is an ionic bond

2. H2O uses hydrogen bonding (H-bonds), NaCl does not

3. H2O is liquid at room temperature. NaCl is solid.

Explanation:

Answer:

It does not react with water, but reacts with most acids

Explanation:

Answer:

It doesn't react with water, but reacts with most acids

The variable that needs to be changed is the temperature at which each bean is kept, hence the correct option is Option D.
This is because the experiment focuses to evaluate the temperature at which a bean sprout grows the fastest. Then, the temperature is the independent variable that  would change to see how it affects the growth rate of the bean sprouts.
There are several factors that can affect plant growth. Such as
1. Light - Plants require light for photosynthesis, which is crucial for their growth and development.

2. Temperature - Plants have an optimal temperature range for growth and development. Extreme temperatures can provide stress and damage to plants.

3. Water - Water is essential for plant growth and development.

4. Humidity - Humidity levels can hamper the plant's growth and development. High humidity levels can remove fungal growth and disease.

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Answer:

29:Mn,V,Sr

30:Ni,Pd,Cs

31:Cr, Mo, W

32:Sn,Pb,Ti

33:F, P, As

Sorry I was in a rush so it may not be right; so check with this picture to help you out.

A 14-year-old adolescent girl, Alice, has been diagnosed with anorexia nervosa. In the assessment of Alice, the findings that are more commonly associated with anorexia nervosa are Dysmenorrhea, decreased body temperature, and Heat intolerance.

Dysmenorrhea: Anorexia nervosa can lead to hormonal imbalances and disruptions in the menstrual cycle, which can cause irregular or absent periods (amenorrhea) and sometimes dysmenorrhea (painful periods).

Decreased body temperature: Anorexia nervosa can lead to lower body weight and reduced body fat, which can result in a lower body temperature. This is a physiological response to conserve energy and maintain the body's functions.

Heat intolerance: Anorexia nervosa can affect the body's ability to regulate temperature properly, leading to increased sensitivity to heat or cold. Individuals with anorexia may feel more discomfort or intolerance in extreme temperatures.

Hence,  the findings that are more commonly associated with anorexia nervosa are explained above.

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Answer:

higher temperature, more kinetic energy, more space between particles, higher volume

This is true because increase in temperature kinetic energy increase so molecules move apart and increase volume

Explanation:

pCO2 is an important factor that affects various aspects of water chemistry and the impacts of ocean acidification. When pCO2 increases, the concentration of total CO2 dissolved in water also increases. This leads to changes in pH, which decreases due to increasing atmospheric CO2 concentration.

When pCO2 rises, the concentration of only CO2 dissolved in water increases. The dissolved CO2 forms carbonic acid, which contributes to the acidification of the ocean. This increase in CO2 affects the equilibrium between CO2, HCO3-, and CO3^2-, shifting it towards higher levels of dissolved CO2 and H+ ions, resulting in a lower pH.

In terms of the impacts of ocean acidification on different organisms, the effects can vary depending on their specific needs. An organism that requires CO2 is likely to fare better under ocean acidification since the increase in dissolved CO2 can provide them with a favorable environment. However, organisms that rely on HCO3- or CO3^2- may fare worse under ocean acidification, as the lower pH interferes with the availability of these carbonate ions, which are essential for shell formation and calcification in some marine organisms.

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Answer:

10.3 g Al

Explanation:

To find the excess mass of Al, you need to (1) convert grams I₂ to moles I₂  (via molar mass), then (2) convert moles I₂ to moles AlI₃ (via mole-to-mole ratio from equation coefficients), then (3) convert moles AlI₃ to grams AlI₃ (via molar mass). Now that you have the actual amount of AlI₃ produced, you need to (4) convert grams AlI₃ to moles AlI₃ (via molar mass), then (5) convert moles AlI₃ to moles Al (via mole-to-mole ratio from equation coefficients), and then (6) convert moles Al to grams Al (via molar mass). Now that you know the amount of Al actually needed to produce the product, you need to (7) find the excess mass of Al.

Molar Mass (Al): 26.982 g/mol

Molar Mass (I₂): 2(126.90 g/mol)

Molar Mass (I₂): 253.8 g/mol

Molar Mass (AlI₃): 26.982 g/mol + 3(126.90 g/mol)

Molar Mass (AlI₃): 407.682 g/mol

2 Al(s) + 3 I₂(g) -------> 2 AlI₃(g)

 113 g I₂           1 mole             2 moles AlI₃          407.682 g
-------------  x  ----------------  x  ----------------------  x  -------------------  =  121 g AlI₃
                       253.8 g             3 moles I₂               1 mole

121 g AlI₃           1 mole                2 moles Al           26.982 g
---------------  x  ------------------  x  ---------------------  x  -----------------  =  8.01 g Al
                        407.682 g          2 moles AlI₃           1 mole

Starting Amount - Mass Needed = Excess

18.3 g Al - 8.01 g Al = 10.3 g Al

The correct statements are that a rock is considered an ore when it contains at least one metallic mineral in sufficient amounts to be extracted profitably and when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

Step-by-step explanation:

When it occurs in sufficient amounts to be used to build roads and buildings: This statement is incorrect. Rocks that are used for construction purposes, such as limestone or sandstone, are not considered ores unless they also contain economically valuable minerals.

Only when it contains lead: This statement is incorrect. Ores are not limited to containing only lead. Ores can contain various metallic minerals, not just lead.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably: This statement is correct. Ores are rocks that contain valuable metallic minerals in concentrations that make extraction economically feasible. These minerals can include gold, silver, copper, aluminum, zinc, and many others.

Only when it contains iron: This statement is incorrect. While iron ores are commonly known and widely used, ores are not limited to containing only iron. There are numerous other metallic minerals that can be extracted profitably from rocks.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably: This statement is correct. Fluorite and sulfur are examples of non-metallic minerals that can be extracted profitably from rocks, and if a rock contains these minerals in sufficient quantities, it can be considered an ore.

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The color of the observed emission in a flame test for a solution containing calcium nitrate, which produces a brick-red flame, is characteristic of the calcium ion. In a flame test, the metal ions in a compound are the primary contributors to the observed color.

This is because the metal ions get excited due to the heat from the flame and then release energy in the form of light when they return to their ground state. The nitrate ion, being a non-metal, does not significantly contribute to the color of the flame in this test. Instead, the nitrate ion acts as a spectator ion that doesn't participate actively in the flame test. The distinct brick-red color of the flame is a result of the specific electronic transitions that occur in the calcium ion. Thus, the characteristic color of the emission observed in the flame test for a solution containing calcium nitrate can be attributed to the calcium ion, not the nitrate ion or both.

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Answer:

it reacts to limestone better and is a bit more firmer and mostly preferred over because of how fast it can react towards chemicals

The mechanism involving the acid-catalyzed hydration of an alkene with water involves the formation of a carbocation intermediate, and the addition of the electrophile is the slow step.

The acid-catalyzed hydration of an alkene with water is a reaction in which an alkene molecule reacts with water in the presence of an acid catalyst to form an alcohol. The mechanism for this reaction involves several steps.

Firstly, the acid catalyst protonates the alkene, forming a carbocation intermediate. This step is usually fast because the alkene acts as a nucleophile and readily accepts a proton from the acid.

Next, water acts as a nucleophile and adds to the carbocation, forming a protonated alcohol. This addition of the nucleophile is typically fast.

Finally, a deprotonation step occurs, where water removes a proton from the protonated alcohol, resulting in the formation of the alcohol product.

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Answer:

Explanation:

25.8 ml of .095 N NaOH is needed to neutralise the remaining acid

equivalent of NaOH used = 25.8 x .095 / 1000 = .002451 gm equivalent .

acid remaining = .002451 gm equivalent .

acid initially taken = 100 ml of .1 N  /  1000  = . 01 gm equivalent

acid reacted with metal = .01  -.002451 = .007549 gm equivalent

This must have reacted with same gram equivalent of metal oxide

.007549  gm equivalent = .15 gm of metal oxide

1 gm equivalent = 19.87 gm

equivalent weight of metal = 19.87 - equivalent weight of oxygen

= 19.87 - 8 = 11.87 .

1

Answer:

If you multiply the miles per hour (30) by 60 (the amount of minutes in an hour) you should get the number for miles per minute. if you multiply that number by 60, you should get the number for miles per second.