The illustration shows the path of a laser leaving a laser pointer. At what point is the laser being absorbed?
Answers
Answer:
D not c
Explanation:
The point showing the laser being absorbed is D.
What is Laser?LASER stands for “Light Amplification by Stimulated Emission of Radiation”
Lasers not only increase the intensity of light but also generate light. Lasers emit light by stimulated emission of radiation, which increases the intensity of radiation. Some lasers produce visible light, and some produce ultraviolet or infrared rays.
The laser light exhibits some peculiar properties compared with the conventional light which make it unique.
Therefore, The point showing the laser being absorbed is D.
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Related Questions
Is it really possible for humans not to alter the natural world around them?
Answers
Answer: I'm sure it's possible but we too lazy
Explanation:
Why does the earth not receive energy equally
Answers
The earth doesn't receive the same energy equally because of its shape. The earth is a sphere, the energy in the equatorial regions are more than the polar regions.
Which activity will NOT cause an increase in reaction rate?
catalyst
inhibitor
surface area
temperature
Answers
Answer:
Inhibitor
Explanation:
Inhibitors generally slow down a reaction rate and prevent the particles from reacting with each other.
It's not the others because:
Catalysts work by lowering the activation energy, which in turn increases the reaction rate as more particles have enough energy to react.
Surface area allows for particles in the reaction to collide more often with each other, which increases the reaction rate.
Temperature increases the speed of particles in the reaction, causing particles to collide more often with each other and therefore increasing the reaction rate.
Inhibitor activity will not cause an increase in reaction rate.
What is rate of reaction?Rate of reaction is defined as the speed at which the chemical reaction takes place defined as the proportional to the increase in concentration of the product per unit time and decrease in concentration of the reactant per unit time.
Rate of reaction is the part of chemical kinetics.
Inhibitors are defined as a substance that decreases the rate of chemical reaction or it may stop the chemical reaction.
Thus, Inhibitor activity will not cause an increase in reaction rate.
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The government is exploring many new green technologies in order to produce energy. One example is the wind turbine. As the wind passes by, the blades move which turns a generator and produces energy. What energy transformation is taking place in the wind turbine?
Answers
Answer:
The mechanical energy of the wind is converted into electrical energy by a wind turbine. The kinetic energy of a flowing fluid, in this example air, is converted into a rotating motion by a turbine. Wind moves or rotates the blades of a wind turbine as it passes through them.
Explanation:
Wind turbines work on a simple principle: rather than using electricity to create wind (like a fan does), they utilize wind to create electricity. The propeller-like blades of a turbine are turned by the wind around a rotor, which spins a generator, which generates power.
Wind is a type of solar energy that is produced by a series of three events: The sun heats the atmosphere unevenly, irregularities on the surface of the world, or the earth's axis of rotation.
Wind patterns and speeds range dramatically across the United States, and are influenced by bodies of water, vegetation, and topography changes. Sailing, flying a kite, and even generating electricity are all examples of how humans employ wind flow, or motion energy.
Both "wind energy" and "wind power" refer to the process of using the wind to generate mechanical or electrical power. This mechanical energy can be employed for specialized purposes (such as grinding grain or pumping water), or it can be converted to electricity using a generator.
The aerodynamic force of the rotor blades, which act similarly to an airplane wing or helicopter rotor blade, converts wind energy into electricity in a wind turbine. The air pressure on one side of the blade lowers when the wind blows across it. Lift and drag are created by the difference in air pressure across the two sides of the blade. The lift force is greater than the drag force, causing the rotor to spin. The rotor is connected to the generator either directly (if it's a direct drive turbine) or through a shaft and a series of gears (a gearbox), which speeds up the rotation and allows the generator to be physically smaller. This conversion of aerodynamic force to generator rotation to create electricity.
Why does the solution turn from yellow to blue?
Answers
Answer:
Bromothymol blue (BMB) is an indicator dye that turns yellow in the presence of acid. When carbon dioxide is added to the solution, it creates carbonic acid, lowering the pH of the solution. BMB is blue when the pH is greater than 7.6, green when the pH is between 6-7.6, and yellow when the pH is less than 6.
Which of these is true about the mantle?
A. It is solid and does not move.
B. It moves quickly and unpredictable.
C. It moves in very slow currents.
D. It can suddenly cause huge fault lines.
Answers
Answer:
c.
Explanation:
it moves in slow convection currents, hope this helps!
The mantle moves in very slow currents, behaving like a non-Newtonian fluid, allowing the solid, yet plastically flowing rock to drive the motion of tectonic plates within the Earth's lithosphere.
The mantle of the Earth is characterized by its ability to move in very slow currents. This is due to the mantle behaving like a non-Newtonian fluid, similar to the material Silly Putty, which can deform under a slow, continuous stress. The mantle, although predominantly solid rock, flows plastically rather like a very viscous liquid, such as honey or corn syrup. The lithosphere, which includes the crust and the rigid uppermost part of the mantle, moves with the tectonic plates atop the slowly flowing asthenosphere. This process is integral to plate tectonics and influences the movement of the Earth's crust.
Among the choices provided, option C - It moves in very slow currents is the correct description regarding the mantle.
Mario uses a hot plate to heat a beaker of 50mL of water. He used a thermometer to measure the temperature of the water. The water in the
beaker began to boil when it reached the temperature of 100 degrees Celsius. If Mario completes the same experiment with 25 mL of water, what would happen to the boiling point? *
Answers
The boiling point decreases as the volume decreases.
Explanation:
The Temperature - Volume law otherwise called as Charles law is applied, which says that the volume of the given gas at constant pressure is directly proportional to the temperature measured in Kelvin. As the volume increases, the temperature also increases, if the volume decreases, then the temperature also decreases.
[tex]$\frac{V}{T} = constant[/tex]
As per the Charles law, here the volume is decreased from 50 ml to 25 ml so the boiling point also decreases.
One major problem with wind and solar energy is that they are conditional. Explain how hydroelectric pumped storage could be used to eliminate this obstacle?
Answers
Answer:
These pumps allow the energy to be saved for later use, whenever the load increases.
Explanation:
These hydroelectric pumps are a vast connection of ancillary grid services. These act as storage plants. These enable an electric provider to balance energy and provide stability. This network not only has reservoirs but also controls the frequency of the energy produced.
Due to this, within a few seconds, large amounts of electricity can be produced.
Hydroelectric Pump is a set of two water reserves which pump water through turbines to generate energy at various required elevations. The produced energy is stored by various electric power systems.
What happens when a hydrocarbon combusts?
O
A. It reacts with oxygen to produce carbon dioxide, water, and heat.
B. It reacts with carbon dioxide to produce oxygen, water, and heat.
O
c. It breaks apart when heated to form solid carbon and hydrogen
gas.
O
D. It breaks apart when heated, forming gases from its individual
atoms.
Answers
The combustion of hydrocarbon results in its reaction with oxygen thereby producing carbon dioxide, water and heat. Thus, option A is correct.
What is combustion?Combustion can be given as the chemical reaction that results with the burning in the presence of oxygen, thereby resulting the oxides and the release of energy.
The hydrocarbon are the compounds with the presence of hydrogen and carbon. Thereby the combustion results in the formation of oxides of hydrogen and carbon that is water and carbon dioxide along with heat. Thus, option A is correct.
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For which characteristic was this Chinese shar-pei MOST LIKELY selectively bred?
A. fat mass
B. wrinkled skin
C. lean muscle mass
D. frequent skin infections
Answers
Answer:
B
Explanation:
because every Chinese shar-pei has wrinkled skin.
Balance the following chemical reactions:
1. Pb(NO₃)₂ → PbO + NO₂ + O₂
2. CH₄ + O₂ → CO₂ + H₂O
3. Cu + AgNO₃ → Cu(NO₃)₂ + Ag
4. MnO₂ + HCl → MnCl₂ + H₂O + Cl₂
5. Pb(NO₃)₂ + NaCl → PbCl₂ + NaNO₃
Write the chemical reaction and balance it.
1. A solution of potassium chloride when mixed with silver nitrate solution, an insoluble
white substance is formed.
2. Copper sulphate on treatment with potassium iodide precipitates cuprous iodide(Cu₂l₂),
liberates iodine gas and also forms potassium sulphate.
Answers
1. 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂
2. CH₄ + 2O₂ → CO₂ + 2H₂O
3. Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
4. MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂
5. Pb(NO₃)₂ + 2NaCl → PbCl₂ + 2NaNO₃
1)
[tex]NaCl+AgNO_3=>NaNO_3+AgC\downarrow[/tex]
2)
CuSO_4+Cu_2Cl_2\neq>
[tex]CuSO_4+Cu_2l_2\neq[/tex]
As the number of effective collisions between reacting particles increases, the rate if a chemical reaction:
A- increases
B- decrease
C- remains the same
Answers
The rate of a chemical reaction increases as the number of effective collisions between reacting particles increases.
Explanation:The rate of a chemical reaction increases as the number of effective collisions between reacting particles increases. This is because an increase in the number of collisions leads to a greater chance of particles colliding with enough energy and the right orientation to react. As a result, the rate of the reaction increases.
Researchers have developed cars which navigate and steer themselves. Aside from cost, what is most likely the main factor keeping these systems from being placed on all new cars?
A) Production facilities
B) Time constraints
C) Driver confusion
D) Technological issues
Answers
Answer:
A
Explanation:because since not all of them hove the sa
me program the pro duction is slow
What do these two changes have in common? snails growing shells rust forming on a bicycle frame Select all that apply.
A. Both are only physical changes.
B. Both are caused by heating.
C. Both are chemical changes.
D. Both are caused by cooling
Answers
Answer:
Im not completely sure about the answer, but A and C are Wrong
Explanation:
This is because the snail growing its shell is a physical change. For the shell of a snail to grow, the snail must consume Calcium to grow its shell. And would grow it just like how we grow our fingernails!
Rust forming on a bicycle frame is an example of a chemical change. This is caused by metal being exposed to oxygen. Just like when you leave your bike outside in the rain, it'll get rusty!
Both snails growing shells and rust forming on a bicycle frame are chemical changes. The former involves the secretion of calcium carbonate, while the latter is the formation of iron oxide due to the reaction of iron with oxygen.
Explanation:The two changes, snails growing shells and rust forming on a bicycle frame, have a common feature - they are both chemical changes.
Snails growing shells is a chemical change because the process of shell growth involves the secretion of calcium carbonate, a chemical process.
Similarly, when a bicycle frame rusts, it is also a chemical change. This is because rust, or iron oxide, forms when oxygen in the air reacts with the iron in the metal - this is a chemical reaction.
Hence option C is correct.
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A material was cooled from 100°C to 40°C. What is the temperature change?
A -40°C
B 60°C
C 40°C
D -60°C
Answers
Just subtract
Answer:
D
Explanation:
Does anhydrous salt contain any water?
Answers
Answer: No
Explanation:
Air and water are both considered to be ____.
Answers
Answer:
Elements.
Explanation:
Modern Chemistry says these are elements.
Answer:
elements
Explanation:
Which factors describe a Mediterranean climate? Check all that apply.
has very few trees
is found in inland areas
has cool and rainy winters
has little to no precipitation
has dense shrubs and grasses
Answers
Answer:
Has very few trees, has cold and rainy winters, and has dense shrubs and grasses.
Glucose is a simple sugar. What other plant foods and chemicals are made from glucose?
Answers
bread, rice, pasta, potatoes, vegetables, fruit, sugar, yogurt, milk, fish, meat, cheese, peanut butter, butter, salad dressing, avocado, and olive oil.
Answer:
Protein, fat, vitamins and oil.
Explanation:
Hope this helps :)
How does an Arrhenius acid change when it
dissolves in water?
Answers
Answer:
Explanation:
when dissolved in water, dissociates into ions, including hydrogen ions. According to Arrhenius, an acid can be defined as a material that increases the concentration of hydrogen ions in water.
Arrhenius acid is that acid when dissolve in water, dissociate into ions and give hydrogen ions H+.
What is an Arrhenius acid?An Arrhenius acid is a molecule that donates an H+ in solution when dissolved in water. To put it simply, a proton donor.
The key to identifying an Arrhenius acid is to look for a molecule that begins with the letter H and contains an oxygen or halogen.
Thus, the Arrhenius acid is that acid when dissolve in water, dissociate into ions and give hydrogen ions H+.
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Which feature is most likely found at a divergent boundary?
Answers
Answer:
Fault-block mountain
In geography, fault-block mountains arise when the Earth's crust pulls apart and divides. Some parts of the Earth are pushed upwards whereas the other moves downward forming a divergent boundary. In geological studies, a divergent boundary can be described as a linear feature which arises due to plate tectonics which are being pulled apart from each other. Hence, fault-block mountains are most likely to be seen in a divergent boundary.
Most active divergent plate boundaries occur between oceanic plates and exist as mid-oceanic ridges. Divergent boundaries also form volcanic islands, which occur when the plates move apart to produce gaps that molten lava rises to fill.
Fault-block mountain
A diverging border is a linear structure that occurs as plate tectonics draw apart from each other in geological investigations.Fault-block mountains form as the Earth's crust separates and pulls away.As a result, fault-block mountains are most likely to appear at a divergent boundary.Fault-block mountain is most likely found at a divergent boundaryFor more information:
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During which of the following processes does a glucose molecule break down into ethanol?
Aerobic respiration
Alcoholic fermentation
Lactic acid fermentation
Photosynthesis
Answers
A glucose molecule breaks down into ethanol during the process of alcoholic fermentation, which is an anaerobic pathway alternative to aerobic respiration.
During the process of alcoholic fermentation, a glucose molecule is broken down into ethanol. This anaerobic process follows the initial step of glycolysis, where one glucose molecule is converted into two pyruvate molecules. This is followed by the conversion of pyruvate into acetaldehyde and carbon dioxide, after which the acetaldehyde is further reduced into ethanol.
This reduction step regenerates NAD⁺ from NADH, which is essential for glycolysis to continue and for the overall fermentation to proceed.
Fermentation processes like alcoholic fermentation and lactic acid fermentation are alternative pathways to aerobic respiration, differing by their end products--ethanol and carbon dioxide in the former, and lactic acid in the latter. Whereas aerobic respiration is a different process entirely in which glucose breaks down into carbon dioxide and water using oxygen, yielding a much higher amount of ATP compared to fermentation.
The correct answer to the student's question is, therefore, alcoholic fermentation, where glucose is broken down into ethanol in the absence of oxygen.
How many moles of nitric acid are needed to make 2 liters of a solution of nitric acid in water with a molarity of 1?
Answers
Answer: 0.5 moles
Explanation:
Nitric acid has a chemical formula of HNO3.
Given that:
Amount of moles of HNO3 = Z (let unknown value be Z)
Volume of HNO3 solution = 2L
Molarity of HCl solution = 1M
Recall that molarity of a solution is obtained by dividing the amount of moles by volume in liters
i.e Molarity = Amount in moles/volume
1M = Z x 2L
Z = (1M / 2L)
Z = 0.5 moles
Thus, 0.5 moles of nitric acid are needed to make 2 liters of its solution.
Calculate the molarity of a solution, given that its volume is 820 mL and that it contains 7.4 g of ammonium chloride, NH,CI.
Answers
Answer:
The correct answer is 0.17 M
Explanation:
We have the following data:
V= 820 ml x 1 L/1000 ml = 0.82 L
m = 7.4 g
Ammonium chloride has the chemical formulae NH₄Cl. So, we calculate the molecular weight (MM) of NH₄Cl from the molar mass of N, H and Cl as follows:
MM NH₄Cl = 14 g/mol + (4 x 1 g/mol ) + 35.4 g/mol = 53.4 g/mol
Now we have to calculate the number of moles of NH₄Cl we have in the solution. For this, we divide the mass (m) into the molecular weight of NH₄Cl (MM):
moles NH₄Cl = m/MM = 7.4 g/53.4 g/mol = 0.138 moles
The molarity of the solution is the number of moles of NH₄Cl in 1 liter of solution. So, we have to divide the number of moles of NH₄Cl into the volume in liters as follows:
M = number of moles NH₄Cl/V = 0.138 moles/0.82 L = 0.169 mol/L ≅ 0.17 M
Answer:
Molarity= 0.169M
Explanation:
Applying n= CV
V=820ml= 0.82dm3
n= m/M = 7.4/53.5 = 0.138mol
0.138= C× 0.82
C= 0.169M
(10 points) What is the empirical formula for a compound that is 54.48% carbon, 13.75% hydrogen, and 31.77 % nitrogen?
Answers
The Empirical formula will be for given compound that is 54.48% carbon, 13.75% hydrogen, and 31.77 % nitrogen is [tex]C_2H_6N[/tex] .
Explanation:
The formula which gives the simple whole number ratio of the atoms of various elements present in one molecule of the compound is understood as empirical formula. This can be more appropriately understood by solving the given problem as follows:
The % of elements given as:
C = 54.48%
H = 13.75%
N = 31.77%
The atomic mass of elements given as:
C = 12 g
H = 1 g
N = 14 g
Calculating number of moles as :
[tex]N = \frac{Mass}{Molecular-Mass}[/tex]
[tex]C = \frac{54.48}{12} = 4.54[/tex]
[tex]H= \frac{13.75}{1} = 13.75[/tex]
[tex]N = \frac{31.77}{14} = 2.26[/tex]
Now, we will divide the least number of moles from number of moles of C, H and N respectively, we will round off the values to an integer value:
For C: [tex]\frac{4.54}{2.26} = 2[/tex]
For H: [tex]\frac{13.75}{2.26} = 6[/tex]
For N: [tex]\frac{2.26}{2.26} = 1[/tex]
Hence, C, H and N are in the ratio of 2:6:1, so empirical formula will be for given compound that is 54.48% carbon, 13.75% hydrogen and 31.77 % nitrogen is [tex]C_2H_6N[/tex].
Final answer:
The empirical formula of a compound with a composition of 54.48% carbon, 13.75% hydrogen, and 31.77% nitrogen is C₂H₆N.
Explanation:
To find the empirical formula of a compound with a percent composition of 54.48% carbon, 13.75% hydrogen, and 31.77% nitrogen, follow these steps:
Assume you have 100 grams of the compound, which translates directly to percentages. Therefore, you have 54.48 grams of carbon, 13.75 grams of hydrogen, and 31.77 grams of nitrogen.Convert these masses to moles by dividing by the atomic mass of each element (carbon: 12.01 g/mol, hydrogen: 1.008 g/mol, nitrogen: 14.01 g/mol).Calculate the mole ratio by dividing each element's mole count by the smallest number of moles calculated in step 2.If necessary, multiply these ratios by an integer to get whole numbers for each element. This gives you the empirical formula.For this compound:
Carbon: 54.48 g ÷ 12.01 g/mol = 4.54 molesHydrogen: 13.75 g ÷ 1.008 g/mol = 13.64 molesNitrogen: 31.77 g ÷ 14.01 g/mol = 2.27 molesDivide each by the smallest number of moles, which is for nitrogen (2.27 moles):
C: 4.54 moles ÷ 2.27 moles = 2H: 13.64 moles ÷ 2.27 moles = 6N: 2.27 moles ÷ 2.27 moles = 1The smallest whole number ratio is 2:6:1, which simplifies to 1:3:0.5. Since we need whole numbers, we multiply by 2 to get the empirical formula: C₂H₆N.
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What part of a wind turbine provides motion to convert into electricity?
A.
generator
B.
blades
C.
tower
D.
rotor
Answers
Answer:B
Explanation: The blades spin making the insides create friction making electricity I think
true or false: an apple looks red because it absorbs red light?
Answers
Answer:
Explanation:
True
Is lithium oxide an acidic oxide or basic oxide? Give reasons for your answer.
Answers
Answer:
Based on their acid-base characteristics oxides are classified as acidic, basic, amphoteric or neutral: An oxide that combines with water to give an acid is termed as an acidic oxide. The oxide that gives a base in water is known as a basic oxide.
Explanation:
Answer:
your answer
Explanation:
The oxide that gives a base in water is known as a basic oxide. An amphoteric solution is a substance that can chemically react as either acid or base. However, it is also possible for an oxide to be neither acidic nor basic, but is a neutral oxide.
What are the different components that make up a chemical formula?
Answers
A chemical formula is made up of chemical symbols of the elements involved, subscripts representing the number of those atoms in the compound, and the simplest whole number ratio of these atoms. Isomeric forms of compounds have the same molecular formula but different structures and properties.
Explanation:A chemical formula represents the composition of a compound made up of two or more elements chemically combined. Three main components make up a chemical formula:
The chemical symbols of the elements: These are one-, two-, or three-letter abbreviations for the elements. For example, the hydrogen symbol is H, and the oxygen symbol is O.Subscripts: These represent the exact number of atoms of that element present in the compound. For example, in H2O, the subscript '2' indicates that there are two hydrogen atoms.The ratio of atoms: An empirical formula gives the simplest, whole-number ratio of atoms in a compound. This could be the same as the molecular formula (as in H2O), or it might be different. For example, the molecular formula of glucose is C6H12O6, but this simplifies to CH2O in its empirical formula.Some molecules may also exist in isomeric forms, which are compounds with the same molecular formula but different arrangements of atoms, which results in different chemical properties. For example, ethanol (C2H6O) and dimethyl ether (C2H6O) have the same molecular formula but their structures and properties are different because of different bonding arrangements.
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What is the mole fraction of NaCl in a mixture containing 7.21 moles NaCl, 9.37 moles KCL, and 3.42
moles LiCI?
Answers
Answer : The mole fraction of NaCl in a mixture is, 0.360
Explanation : Given,
Moles of [tex]NaCl[/tex] = 7.21 mole
Moles of [tex]KCl[/tex] = 9.37 mole
Moles of [tex]LiCl[/tex] = 3.42 mole
Now we have to calculate the mole fraction of [tex]NaCl[/tex].
[tex]\text{Mole fraction of }NaCl=\frac{\text{Moles of }NaCl}{\text{Moles of }NaCl+\text{Moles of }KCl+\text{Moles of }LiCl}[/tex]
Now put all the given values in this formula, we get:
[tex]\text{Mole fraction of }NaCl=\frac{7.21}{7.21+9.37+3.42}=0.360[/tex]
Therefore, the mole fraction of NaCl in a mixture is, 0.360
Answer:
.36
Explanation: