Answer:
378.196
Explanation:
235 miles = 378.196 Kilometers
Is AgNo3 an allotrope or a polymorph?
AgNo3 is a polymorph as it can be many forms.
PolymorphA substance's capacity to crystallize into various crystalline forms is known as polymorphism. These crystal modifications are also referred to as polymorphs. Polymorphs behave differently in the solid state even though they are the same in the liquid or gaseous states.
Allotrope :The ability of some chemical elements to exist in two or more different forms, in the same physical state, is known as allotropy or allotropism. These forms are referred to as the element's allotropes. Allotropes are different structural modifications of an element in which the bonding between the atoms is altered.
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This is science not Chemistry
In the following illustration what do you call location (a) and location (b)?
Answer:
you can do it shshbssjjsjsnsjssbsjsb
Two construction workers are attempting to pull a slab of concrete off of the ground. Each of the workers are pulling up
with a force of 225 N, while the slab of concrete applies a gravitational force of 400 N in the opposite direction, remaining
stationary.
If the pulling forces applied to the slab of concrete are assigned a positive value, what is the net force of the scenario, and
in which direction will the slab of concrete move?
(1 point)
O 50 N; the slab will move upward
O 175 N; the slab will move upward
O-175 N; the slab will remain stationary
O -50 N; the slab will remain stationary
If the pulling force of 225 N each is assigned a positive value, the net force of the scenario will be 50 N and the slab will move upward.
What is the net force?The net force acting on an object is the resultant force. It is the sum of all the forces acting on the object.
The forces acting on the slap concrete are three, namely:
The gravitational force of 400 NThe pulling force of 225 N by construction worker 1The pulling force of 225 N by construction worker 2These forces are acting in opposite directions. The gravitational force is acting downward while the pulling forces by the construction workers are acting upward.
Now, the pulling forces of the construction workers are assigned positive values. Since the gravitational force acts in opposition to the pulling forces, it means the gravitational force will be assigned a negative value.
Thus, the resultant force can be calculated as:
225 + 225 - 400 = 50 N
The resultant force is 50 N and positive. This means the slab will move in an upward direction.
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Can somebody please help me
Answer:
a
Explanation:
because this could be down to coincidences whereas the others could be explained with scientific experiments
Answer:
A
Explanation:
Must be testable - A is not
a student accidentally drops the watch glass atop the evaporating dish containing the dried salt and it breaks , how could this affect the calculation
When this occurs the result that is obtained from the calculation would no longer be trustworthy because it is above the actual value.
How would this affect the calculation?We know that evaporation involves the heating a sample of a substance until all the water in it leaves and it remains only the crystalline solid. The whole water would evaporate and the mass of the sample would decrease.
When the student accidentally drops the watch glass atop the evaporating dish containing the dried salt and it breaks, the particles of the glass would mix with the dried salt and increase the mass of the dried salt.
When this occurs the result that is obtained from the calculation would no longer be trustworthy because it is above the actual value.
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The metallic radius of a sodium atom is 186 pm. What is the volume of a sodium atom in cubic meters? Assume the atom is a perfect sphere. The volume of a sphere is calculated from (4/3)π×r3
The volume of the sodium atom is 2.7 * 10^-29 cubic meters
What is the volume of the sodium atom?Let us recall that the volume is the an atom could be approximated to be the same as the volume of a sphere where the atom has been taken to be a sphere.
We know that volume of a sphere = (4/3)π×r3 where r = radius of the sphere. Having known that we convert the radium into meters and we have 186 * 10^-12 m
Thus;
Volume = 4/3 * 3.142 * ( 186 * 10^-12)^3
Volume = 2.7 * 10^-29 cubic meters
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Draw a triglyceride (glycerol with three amino acids, each joined by a dehydration synthesis reaction. Be sure to show where each fatty acid was added to the glycerol and indicate with an arrow where each of the three water molecules were removed during the dehydration synthesis reaction.
Triglycerides are the storage form of fats found in adipocytes.
What are triglycerides?Triglycerides are a class of lipids which are formed from three molecules of fatty acids which may be the same or different molecules and a glycerol molecule.
The fatty acids are linked by ester linkage to the glycerol molecules.
Triglycerides are the storage form of fats found in adipocytes.
Triglycerides are important energy storage molecules,
In conclusion, triglycerides are composed of three molecules of fatty acids and a glycerol molecule.
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11. A covalent bond between C and H is_____. It is called that,because electrons are shared_____ between these two atoms.C and H,are not________
12. An______ bond is formed when an electron is transferred from one atom to another.
The atom that loses an electron is called a(n)________and has
charge________.The
atom that gains an electron is called a(n)__________and has_______charge.
13. A hydrogen bond is formed between a H in one molecule and an________atom in
another molecule. The H can make an H-bond only if it is found in a_________covalent
bond, in its own molecule.
14. H-bonds give________
many of its special properties.
15. A van der Waals interaction is the__________type of bond. All molecules form these
bonds. These interactions become important when found in great numbers. The often help the
3D shape of large molecules such as________Or________.
11.) Non polar, equally, Charged.
12.) Ionic, Cation, Positive, anion, negative
13.) electronegative, Polar
14.) So
15. weak, HCl or N2
A covalent bond between C and H is Non Polar. It is called that,because electrons are shared Equally between these two atoms.C and H,are not Charged
12. An Ionic bond is formed when an electron is transferred from one atom to another.
The atom that loses an electron is called Cation and has charge positive. The
atom that gains an electron is called anion and has negative charge.
13. A hydrogen bond is formed between a H in one molecule and an Electronegative atom in
another molecule. The H can make an H-bond only if it is found in a Polar covalent
bond, in its own molecule.
H-bonds give So many of its special properties.
A van der Waals interaction is the Weak type of bond. All molecules form these
bonds. These interactions become important when found in great numbers. The often help the
3D shape of large molecules such as HCL or N2
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The initial water level in a 10-mL graduated cylinder is 4.9 mL . After a sapphire gemstone is added into the cylinder, the water level is 6.2 mL .
What is the volume of the sapphire?
The volume of the sapphire, given the data from the question is 1.3 mL
Data obtained from the questionFrom the question given above the following data were obtained:
Volume of water = 4.9 mLVolume of water + sapphire = 6.2 mLVolume of sapphire =?How to determine the volume of the sapphireThe volume of the sapphire can be obtained by using the displacement method as follow:
Volume of sapphire = (Volume of water + sapphire) - (Volume of water)
Volume of sapphire = 6.2 - 4.9
Volume of sapphire = 1.3 mL
Thus, the volume of sapphire is 1.3 mL
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On what axis is the dependent variable in the graph below?
Growth Rate
100
2828&SARS
90
80
70
60
50
40
30
20
10
0
Full Sun
Plants for Sun and Shade
Partial
Shade
Sun Exposure
Geranium Impatiens Fuchsis Trillium
Partial Sun
Dappled
Sun
Full
Shade
On sunlight exposure depends the growth rate of variable plants
A. Geranium plant is sun loving plant because it showed maximum growth in full sun condition. The growth gradually decreases with the availability of sunlight. In full shade Geranium showed only 10% growth.
B. Impatiens plant showed its maximum growth in partial shade condition. The growth of only 40% occurs in dappled sun condition. In partial sun and full shade conditions it shows only 30% growth. Full sun is harmful for impatiens as it showed only 10% growth.
C. Fuchsia also show maximum growth in partial shade condition. It showed gradual decrease in growth in dappled sun, full shade, partial sun, and full sun respectively.
D. Trillium is shade loving plant because it shows maximum growth in full shade. It shows the lowest growth in full sun which gradually increases in partial sun, partial shade, dappled sun and full shade respectively.
So basically Geranium is full sun plant, Trillium is full shade plant and Impatiens ad Fuchsia are partial shade plants.
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The 2017 U.S. gross domestic product (GDP) was valued at 19, 390, 604, 000 dollars. How many Gateway Arch-height stacks of
half dollars are needed to match the GDP in value?
Therefore, we require roughly 589,008.49 Empire State building-height stacks of dimes (856,418,343.3 / 1,454).
A stack of 100 dimes is about 5.3 inches tall. $10 is equal to 100 dimes. Therefore, 1,939,060,400 stacks of 100 dimes are required. This astounding number of dimes is 856,418,343.3 feet tall (1,939,060,400 x 5.3/12).
The Empire States Building is 1,454 feet tall when the antenna is added. Therefore, we require roughly 589,008.49 Empire State building-height stacks of dimes (856,418,343.3 / 1,454). Compared to 2016, when it climbed by 2.8 percent, or $503.8 billion, current-dollar GDP increased by 4.1 percent, or $766.1 billion, to a level of $19,390.6 billion in 2017. In 2021, the current-dollar GDP reached a level of $22.99 trillion, up 10.0% or $2.10 trillion.
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How many atoms of nitrogen are there in one mole of nitrogen dioxide?
Express your answer in number of atoms to four significant figures.
Answer:
All objects in the universe are made up of atoms. The number of atoms that can make up even a small object make up an incredibly large and unfathomable number, on the order of 10231023 atoms. The mole measurement was created in order to more easily deal with the number of atoms in a given substance. One mole is equal to 6.022 × 10236.022 × 1023 atoms.
What orbitals would be present in principal energy level two?
There are 4 orbitals in the principal energy level two. These are: one 2s orbitals and three 2p orbitals (2px, 2py and 2pz).
Principal energy level indicates the energy shell outside the nucleus in which an electron is located. There are 4 principal energy levels. These are: s (sharp), p (principal), d (diffuse) and f (fundamental). The principal energy level can be denoted by the letter n.
Orbital is a function. It describes the behavior and the location of an electron in an atom. The orbitals for any energy level are calculated using the formula n² (where n is the number of orbitals). Hence for energy level 2, the number if orbitals = 2² = 4. Now s has only one orbitals and p has three, therefore a total of four orbitals.
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Question 2 of 10
Which chemical equation is balanced?
A. CO₂ + H₂O → H₂CO₂
B. K+ H₂O → K₂O + H₂
C. CaO2 + HCl → CaCl₂ + H₂O
OD. MgO + 2HCl → MgCl₂ + H₂O
The equation MgO + 2HCl → MgCl₂ + H₂O is a balanced equation.
A balanced chemical equation contains equal number of atoms on both sides of the equation.The equation is MgO + 2HCl → MgCl₂ + H₂O which contains 1 atom of Mg, 2 atoms of chlorine, 2 atoms of chlorine, 1 atom of oxygen on both reactants and products sides.So the equation is balanced.An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction. In other words, both sides of the reaction have equal amounts of mass and charge.It follows law of conservation of mass.Mass is neither created nor destroyed rather it can be transferred from one form to another.Learn more about balanced equation at:
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the physical properties of minerals result from their ____?
Answer: Internalized Crystal Structure
Explanation:
"The exact and unique arrangement of atoms, ions or ionic groups is the characteristic feature of each crystallized mineral."
- S.K. Haldar & Josip Tisljar, authors of Mineralogy and Petrology
A mineral's unique and specific crystal structure determines the physical properties such as color, hardness, density, luster, crystal form, cleavage and fracture.
1. (1 point) The Sherlock Holmes story, the Sign of the Four, involves the Great Mogul
diamond. Before cutting, its weight was 787 carats. 1 carat = 0.200 gram. Assume that
the diamond is pure carbon. Calculate the number of moles of carbon in the uncut Great
Mogul diamond. Also calculate the number of carbon atoms.
no. of moles in uncut diamond are 13.11 mol and number of Carbon atoms are 78.94 × 10^23.
The atoms of diamond are grouped in a crystal structure known as diamond cubic, and it is a solid form of the element carbon. The chemically stable form of carbon is another solid form of carbon known as graphite at ambient temperature and pressure, but diamond transforms to it very slowly.We are aware that a mole is a unit of measurement for a substance that contains precisely the same number of atoms as 12 g of C12.The mass of a substance is given in this case. We are aware that the diamond is Carbon's allotrope.
weight of diamond before cutting = 787 carats
1 carat. = 0.200 gram
therefore, 787 carats. = 787 × 0.200
= 157.4 gram
To calculate the number of moles equation is
Number of moles =Mass / Molar mass
Molar mass of carbon Is 12g/mol
therefore, no. of moles = 157.4 / 12 = 13.11 mol
We know that 1 mol of any substance contains 6.022×10^23 atoms.
Here we have 13.11 mol of carbon. thus,
No. of Carbon atoms = 13.11 × (6.022×10^23 / 1 mol) = 78.94 × 10^23
Thus, 13.11 mol of diamond contain 78.94 × 10^23 number of Carbon atoms.
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An element has 3 naturally occurring isotopes. Isotope 1 has a relative
abundance of 12.99% and isotope 2 has a relative abundance of 40.49%.
What is the relative abundance of isotope 3?
The correct answer for relative abundance of isotope 3 is 46.52%.
Let's consider element X, which has 3 isotopes: isotope 1 with a relative abundance of 12.99%, isotope 2 with a relative abundance of 40.49% and isotope with an unknown relative abundance.
Assuming there are only 3 isotopes of element X, we know that the sum of the relative abundances of them is equal to 100%. The relative abundance of isotope 3is:
ab(isotope 1) + ab(isoptope 2) + ab (isotope 3) = 100 %
isotope 3 = 100% - (12.99% + 40.99 % )
isotope 3 = 46.52 %
Element X has 3 isotopes: isotope 1 with a relative abundance of 12.99%, isoptope 2 with a relative abundance of 40.49% and isotope 3 with a relative abundance of 46.52%.
The percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element is known as its relative abundance.
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A light wave has a frequency of 5 x 1014 Hz and a speed of 3 × 10 m/s. Use
the wavelength equation to calculate the wavelength.
A light wave which has a frequency of 5 x 1014 Hz and a speed of 3 × 10 m/s has wavelength is 0.6 × 10^-6.
Wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire.The number of cycles or vibrations that a body in periodic motion experiences during one unit of time, as well as the number of waves that pass a fixed point in a unit of time is called Frequency. Frequency is expressed in Hertz (Hz).Speed of light, the rate at which light waves move through various substances. Specifically, the speed of light in a vacuum is presently calculated to be 3 × 10⁸ m/s.Frequency of light wave = ν = 5 × 10¹⁴ Hz
Speed of light c = 3 × 10⁸ m/s
we have to find out wavelength λ of light wave
We know that,
c = λ × ν
λ = c / ν
= 3 × 10⁸ / 5 × 10¹⁴
0.6 × 10^-6
Therefore, wavelength of light wave is
0.6 × 10^-6
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What data would be most helpful to support the claim that the population of a certain plant is dependent on the rainfall in its habitat?
OPTIONS
The average amount of water absorbed by the roots and given off by the leaves of these plants
The amount of water retained in the soil in the area where the plants live
Rainfall amounts and number of these plants in a certain habitat over several years
The heights and number of leaves produced by these plants under different moisture conditions
Explanation:
make up some of your own signs which can warns people about the dangers of river an ocean a large snake hiding in the bush
Which compound would make a saturated solution if 200 grams were dissolved in 100 grams of water at 90 degrees Celsius?
KNO3
Sugar
NaBr
KCl
Sugar compound would make a saturated solution if 200 grams were dissolved in 100 grams of water at 90 degrees Celsius.
What is saturated solution?A saturated solution is a type of solution in which the maximum amount of solvent has been dissolved. In a saturated solution, no more solute can be dissolved at a given temperature because of no capacity. We can make an saturated solution by adding more solute until no more solute can be dissolved in the solvent. We can make a saturated solution if we added more amount of sugar in less amount of water.
So we can conclude that Sugar compound would make a saturated solution if 200 grams were dissolved in 100 grams of water at 90 degrees Celsius.
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A materials engineer wants to test how the thickness of insulation in sleeping bags affects their performance in freezing temperatures. She constructs sleeping bags with varying insulation thickness and records the temperature inside the sleeping bag every five minutes for 8 hours at 0°C. Which of the following is the dependent (outcome) variable in her experiment?
Temperature changes in sleeping bag is the dependent (outcome) variable in her experiment.
What are the types of variables in experiment ?Variables are the major manipulating factor which is compulsorily added to the experiment in order to get accurate results like person's eye color, its value can change from brown to blue depending on different factors.
An independent variable can not change by the presence of other factor where as dependent variable depend on other variable and can be influenced by other components.
Control variables are the constant which only determine the accuracy of the experimental result and prevent bias from the experiment.
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A spherical iron ball has a
diameter of 11.6 cm and has a
mass of 3.60 kilograms. This
particular ball has a hole inside
of it. Given that the density of
iron metal is 7.86 g/cm*, what is
the volume in cm" of the hole
inside the ball? (The volume of
a sphere is (4/3) Tr3)
The volume of the hole inside the ball is 359.27 cubic inches if the spherical iron ball has a diameter of 11.6 cm and a mass of 3.60 kilograms.
What is a sphere?It is defined as three-dimensional geometry when half-circle two-dimensional geometry is revolved around the diameter of the sphere that will form.
[tex]\rm V = \dfrac{4}{3} \pi r^3[/tex]
The volume of the sphere V = (4/3)πr³
The diameter d = 11.6 cm
The radius r = 11.6/2 = 5.8 cm
The volume of the sphere V = (4/3)π(5.8)³
V = 817.28 cubic cm
As we know,
The density d = mass/volume
7.86 = 3600/volume
Volume = 458.01 cubic cm
The volume of the hole inside the ball = 817.28 - 458.01
= 359.27 cubic inches
Thus, the volume of the hole inside the ball is 359.27 cubic inches if the spherical iron ball has a diameter of 11.6 cm and a mass of 3.60 kilograms.
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People are looking to see why some people get bit more by mosquitos than others. Some people have
wondered if the scent of their perfume can have an effect on how often they are bit.
a)
independent variable:
b) dependent variable:
c) three possible constants in the
scenano
Answer:
see bellow..
Explanation:
a) independent variable ; the specific scents being used (like vanilla, or blueberry etc.)
b) how much of it is sprayed
c) the weather, brand of perfume, record time
2013 Cengage Learning
3. A student measured the dimensions of a table and recorded the length as 103.50 cm and the width
as 73.75 cm. According to the student's calculator, the area is 7633.125 cm². What value should the
student report as the area? Explain your answer.
Dimensions of a table and recorded the length as 103.50 cm and the width
as 73.75 cm
AREA = L × B
AREA = 103.50 × 73.75
area = 7,633.125 cm²
but the student should report 7633 cm² because the width measurement (73.75 cm) has 4 significant figures while the length measurement (103.50 cm) has 5 significant figures and when multiplying the answer should have the same number of significant figures as the number with the least number of sig figs.
Significant Figures can help determine the accuracy of a number by the number of significant figures it contains.so the correct answer should be 7633 cm².
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How many GRAMS of aluminum sulfate can be made from 1.18 grams of aluminum
Answer:
Do a quick conversion: 1 moles Aluminium Sulfate = 342.150876 gram using the molecular weight calculator and the molar mass of Al2(SO4)3.
Explanation:
The following precipitation reaction can be used to determine the amount of copper ions dissolved in solution. A chemist added 5.00 × 10−2 L of a solution containing 0.173 mol L−1 Na3PO4(aq) to a 5.00 × 10−2 L sample containing CuCl2(aq). This resulted in a precipitate. The chemist filtered, dried, and weighed the precipitate. If 1.21 g of Cu3(PO4)2(s) were obtained, and assuming no copper ions remained in solution, calculate the following: the concentration of Cu2+(aq) ions in the sample solution. the concentrations of Na+(aq), Cl−(aq), and PO43−(aq) in the reaction solution (supernatant) after the precipitate was removed.
From the stoichiometry of the reaction, 0.094 g of [tex]Cu^{2+}[/tex] is contained in the reaction.
What is the amount of the copper ion?The reaction equation is given by; [tex]2Na_{3}PO_{4} (aq) + 3CuCl_{2} (aq) ----- > 6NaCl (aq) + Cu_{3}(PO_{4}) _{2} (s)[/tex]. We must note that the balanced reaction equation is the entry way into obtaining the correct stoichiometry of the reaction in order to solve the problem.
Number of moles of [tex]Na_{3}PO_{4}[/tex] = 5.00 × 10−2 L * 0.173 mol L−1 = 0.00865 moles
If 2 moles of [tex]Na_{3}PO_{4}[/tex] produces 1 mole of[tex]Cu_{3}(PO_{4}) _{2}[/tex]
0.00865 moles of [tex]Na_{3}PO_{4}[/tex] produces 0.00865 moles * 1 mole/2 moles
= 0.0043 moles of [tex]Cu3(PO4)2[/tex]
Number of moles of [tex]Cu^{2+}[/tex] = 0.0043 moles/3 = 0.00144 moles
Mass of [tex]Cu^{2+}[/tex] = 0.00144 moles * 63.5 g/mol = 0.094 g
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a 24.37mol of gas occupied 5.32ml vessel. what mole of the gas should be removed to get a volume of 2.56ml?
Mole of the gas should be removed to get a volume of 2.56ml is 10.26 mol.
Equation :Given data,
Volume₁ = 5.32ml
number of moles at 5.32ml n₁ = 24.37mol
Molarity = ?
Volume₂ = 2.56ml
number of moles = ?
First to find molarity of gas using formula,
M = nV
where,
M is molarity
n is numbers of mole
V is volume
So, putting the values of volume₁,
M = 24.37mol x 5.32ml
M = 129.65 mol/ml
So again to get moles of second volume in same formula we have,
M = nV
So,
n = M / V
n₂ = 129.65 / 2.56ml
n = 50.64mol
So,
n₂ - n₁ = 50.64mol - 24.37mol
n = 26.27
So,
mole of the gas removed = 26.27 / 2.56
mole of the gas removed = 10.26mol
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hi, this is a continuation of another question-
11. 60 subjects watch a videotaped re-enactment of a robbery that happened last week at a local bank, Half of the subjects were questioned by a police investigator to recall the event, while the other half were hypnotized and then questioned.
IV:
DV:
Hyp:
A constant:
The Control:
12. An automobile manufacturer carried out a research to know how much bright, brake lights should be kept in order to minimize the time required by the driver of a following car to realize that the car in front is stopping and to hit the brakes.
IV:
DV:
Hyp:
A constant:
The Control:
13. There will be a difference in graduation rates of at-risk high-school seniors who participate in a program as opposed to at-risk high-school seniors who do not participate in the program.
IV:
DV:
Hyp:
A constant:
The Control:
14. You want to test a new drug that supposedly prevents sneezing in people allergic to grass.
IV:
DV:
Hyp:
A constant:
The Control:
15. A soap manufacturer wants to prove that their detergent works better to remove tough stains.
IV:
DV:
Hyp:
A constant:
The Control:
16. Measuring the growth rate of plants under full sunlight for 8 hours a day versus plants that only have 4 hours of full sunlight per day
IV:
DV:
Hyp:
A constant:
The Control:
17. How much water flows through a faucet at different openings?
IV:
DV:
Hyp:
A constant:
The Control:
18. Does heating a cup of water allow it to dissolve more sugar?
IV:
DV:
Hyp:
A constant:
The Control:
19. How can you tell time using a candle?
IV:
DV:
Hyp:
A constant:
The Control:
20. Do bicycle fenders keep the rider dry when riding through a puddle?
IV:
DV:
Hyp:
A constant:
The Control:
The parts of the experiment, including the independent variable, (IV), dependent variable, (DV), hypothesis, (hyp), constant and control are;
11. IV: A robbery
DV: Ability to recall
hyp: Hypnotism affects memory
A constant: Watching
Control: Subjects that where not hypnotized
12. IV: Lights brightness
DV: response time
Hyp: Brightness lights affect the response time
A constant: The car's speed
The Control: Driving without break lights
13. IV: School seniors attendance of the program
DV: Graduation rate
Hyp: Graduation rate is affected by the attendance of the program
A constant: Number and quality of examination questions
The control: At–risk high–school seniors that do not attend the program
14. The new drug
DV: Sneezing
Hyp: New drug reduces sneezing
A constant: The type of grass
The control: A placebo
15. IV: The detergent
DV: Toughness of the stain removed
Hyp: The detergent is effective in removing tough stains
A constant: The amount of detergent
The control: Washing without detergent
16. IV: Exposure duration
DV: Growth
Hyp: Growth depends duration of exposure
A constant: Plant type
The control: 8 hours of sunlight exposure for the plant in the control
17. IV: Water
DV: Amount flowing
Hyp: Flow rate depends on the opening
A constant: The relative location of the openings
The control: Water flowing into the pipe
18. IV: Heat
DV: Amount of solute dissolved
Hyp: A hot cup of water dissolves more sugar
A constant: The quantity of water used
The control: Sugar dissolved in the cup of water without heating.
19. IV: Timed
DV: position of candle's shadow
Hyp: Length and position of the candle's shadow depends on the time of the day.
The constant: Using a fixed length of the candle
The control: A candle placed in the shade
20. IV: Riding through a puddle
DV: Rider remaining dry or not dry
Hyp: Fenders keeps riders dry
A constant: The path
The control: Riding without a fender
What are the parts of the experiments?The independent variable in an experiment is not affected by any other variable, it is also known as the input variable, which causes a change in the output variable or dependent variable.
The dependent variable is the variable that is being studied in the experiment.
An hypothesis is a proposition or proposal made on the basis of limited evidence.
A constant is a quantity that does not change or is kept on standby the researcher.
A control is used as a benchmark or reference or comparison point with the test results of the experiment
11. Independent variable, IV: The robbery that happened last week
Dependent variable, DV: Ability to recall the robbery incident
Hypothesis, hyp: That hypnotism affects memory recall
A constant: Watching the robbery video
Control: The 30 subjects that where not hypnotized
12. IV: The brightness of break lights
DV: The time it takes the following car driver to hit the breaks
Hyp: The brightness of break lights affect the response time of following drivers
A constant: The speed of the cars
The Control: Driving without break lights
13. IV: At–risk high–school seniors
DV: Graduation rate
Hyp: The graduation rate is affected by the attendance of the program
A constant: Number and quality of examination questions
The control: At–risk high–school seniors that do not attend the program
14. IV: The new drug.
DV: Rate of sneezing in people allergic to grass
Hyp: The new drug reduces the rate of sneezing in people allergic to grass
A constant: The type of grass used in the experiment
The control: The administration of a placebo to people that are allergic
15. IV: The detergent
DV: Toughness of the stain removed
Hyp: The detergent is effective in removing tough stains
A constant: The amount of detergent applied
The control: Washing of stains without detergent
16. IV: The duration of exposure to sunlight
DV: The growth rate of the plants
Hyp: The growth rate depends on the duration of exposure to sunlight
A constant: The type of plant in the experiment
The control: Plants that have 8 hours of sunlight
17. IV: The amount of water flowing in the pipe
DV: Amount of water flowing from a faucet
Hyp: The amount of water flowing out depends on the opening
A constant: The relative location of the openings
The control: The water flowing into the pipe
18. IV: The heat applied to the sugar solution
DV: The amount of sugar dissolved in the solution
Hyp: A hot cup of water dissolves more sugar
A constant: The amount water in the cup
The control: The amount of sugar dissolved in the cup of water without heating.
Learn more about the parts of an experiment here:
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calculate the molar mass of Na2S2O3.5H2O
Answer:
248
Explanation:
Na2 = 23 x 2
S2 = 32 x 2
O3 = 16 x 3
5h20 = 5 x (2+16)
add these and u get 248
What is the scientific method?
A. A set of steps that help scientists gather knowledge
OB. A set of rules that all scientists need to follow
OC. A way for scientists to prove that their theories are correct
D. A way for scientists to come up with questions about the world
