Two slits with close spacing are the target of an electron beam. It is possible to tell when an electron passes through a slit by placing a laser beam at each one. (Position b)
What does intensity look like?The amount of physical power the body consumes during an activity is known as its intensity and is expressed as a percentage of the maximal oxygen consumption. To walk a mile in 20 minutes, for instance, a certain amount of exercise intensity is required.
How do people behave with intensity?Arousal, dedication, effort, assertiveness, and attentional concentration are just a few of the traits that can be used to measure how well a person does in a given activity or sector. additionally known as performance intensity.
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what scientific applications can spectrophotometry be used for?
Spectrophotometry applications can be used to: measure the absorbance, reflectance and transmission of light by gases, liquids, and solids.
What is spectrophotometry?Branch of electromagnetic spectroscopy concerned with the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength is called spectrophotometry.
Spectrophotometry is the quantitative measurement of the interaction of ultraviolet, visible, and infrared radiation with the material and has a impact on a wide field of science and technology.
Spectrophotometry is a method to measure how much chemical substance absorbs light by measuring the intensity of light as beam of light passes through sample solution.
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Three objects having the same mass begin at the same height, and all move down the same vertical distance H. One falls straight down, one slides down a frictionless inclined plane, and one swings on the end of of a string. In which case does the object have the biggest total work done on it by all forces during its motion? Free Fall Incline String Same
The object has the greatest total work done on it by all the forces during its motion, when it is in Free Fall. The correct answer A.
The object that has the biggest total work done on it by all forces during its motion is the one that falls straight down, as it experiences the force of gravity over its entire path.
The object that slides down the frictionless inclined plane experiences the force of gravity over only part of its path, while the object that swings on the end of a string only experiences the force of gravity for a very short period of time.
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What are most asteroids made of ?
Asteroids are made up of rock. The most common constituents are clay and silicate. It usually have some metals like nickel or iron in them.
Asteroids are also known as mini planets. They are rocky remnants left over 4.6 billion of years, formed during the formation of solar system. Currently there are 1,266,744 known asteroids in the solar system. Most of them are found in the asteroid belt between Mars and Jupiter.
The composition of asteroids are determined by its distance from the sun. Ones that are nearer to sun have mainly carbon in them. It also have trace amounts of nitrogen, hydrogen and oxygen. The farther the asteroids, the constituent is rocky silicates. Some metallic asteroids are made up of 80% of iron, 20% of elements like nickel, palladium, platinum, gold, osmium, ruthenium and rhodium.
So most of the asteroids are made up of silicate, carbon and metals like iron.
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Why doesn’t the gravitational pull between the Sun and the planets cause the planets to fall into the Sun?
Multiple choice:
The inertia of the planets is in a direction away from the sun.
The Sun’s rotation pushes the planets out.
The Sun’s magnetic fields are pushing out.
The background stars pull back on the planets.
The correct option is: a. The inertia of the planets is in a direction away from the Sun.
The explanation the planets in our planetary group don't fall into the Sun is because of a harmony between the gravitational draw of the Sun and the latency of the planets. As the planets move in their circles around the Sun, they are continually falling towards it, yet their forward movement holds them back from being pulled in. This is like the way in which a ball tossed in the air will keep on pushing ahead even as it is pulled descending by gravity.
Different choices recorded, like the Sun's revolution, attractive fields, or the draw of foundation stars, don't assume a critical part in keeping the planets in their circles. While the Sun's pivot and attractive fields really do significantly affect the movement of articles in the nearby planet group, they are not sufficiently able to neutralize the gravitational draw of the Sun. Likewise, while the draw of foundation stars can affect the movement of items in the planetary group, they are excessively far away and excessively frail to fundamentally affect the planets' circles around the Sun.
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Health-related physical fitness is defined as fitness related to some aspect of health. This type of physical fitness is primarily influenced by an individual's exercise habits; thus, it is a dynamic state and may change. Physical characteristics that constitute health-related physical fitness include strength and endurance of skeletal muscles, joint flexibility, body composition, and cardiorespiratory endurance. All these attributes change in response to appropriate physical conditioning programs, and all are related to health.
Health-related physical fitness is important for overall health and well-being. Health-related physical fitness can help improve an individual's quality of life and reduce their risk for certain diseases.
What is the quality ?The quality of something is its level of excellence. It is a measure of how good something is compared to other things of the same type, and it is usually judged by an expert or by public opinion. Quality is subjective and can be difficult to define. Generally, it is determined by the degree to which something meets its intended purpose, is aesthetically pleasing, or is unlikely to cause harm. Quality is also determined by the level of craftsmanship, materials, and effort that goes into creating something, as well as the amount of care that is taken to ensure that it meets the highest standards. Quality is important as it can affect a product or service's success and it can also impact a person's satisfaction with a purchase.
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can somebody help with solving this )
Answer:
59.8amperes
Explanation:
firstly calculate for resistance in the series connection by adding up the two resistors in series to get 15ohms
secondly calculate for the total resistance by adding up the the resistors in parallel together
thirdly you solve for current using the formula I=V/R
Base your answers to following questions, 1-6 on the information below.
Tiger Woods is standing at the tee after his knee surgery and can't wait to take out the driver and hit the golf ball down the fairway with a little slice (because of the dog leg right). If he hits the golf ball at
an angle of 30 degrees with the horizontal and a velocity of 196 m/s, find the following
1. The initial vertical component of the velocity is:
2. The initial horizontal component of the velocity is:
3. When the golf ball reaches a maximum height, the vertical component of the velocity is:
4. The time of the flight of the golf ball is:
5. The maximum height of the golf ball is:
6. The horizontal range of the golf ball is:
Answer: hghj
Explanation:
fygvbufvtdcrsxeasxtrydtcufyvigubohljnk
assume that c is a variable that has assigned a string value. write an expression whose value is true if and only if c is a newline character.A. isQuadrilateral=numberOfSides== 4B. c == '\n'C. c=="\t"D. c == "
Only if the character c is a newline. Quadrilateral=numberOfSides for A. c == '\n' The comparison operator "c == 'n'" determines whether the value of the variable “c” equals the newline character "n."
What purpose of the expression “c == '\n'"?A newline character, which is a control character in programming languages, signifies the end of one line of text and the start of a new one. The ASCII character code 10 or the escape sequence "n" serves as its representation.
The comparison “c == '\n'" is evaluated as follows:
The value of the variable “c” is retrieved.
The character '\n' is created as a constant.
The values of “c” and '\n' are compared.
If they are equal, the result of the comparison is true; otherwise, it is false.
In conclusion, this phrase can be used to programmatically determine whether a variable has a newline character, which is helpful for text manipulation and parsing.
Therefore, If the value of "c" is a newline character, the phrase "c == 'n'" will only be true. The formula evaluates to false if the character "c" is any other character.
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SKETCHPAD
Two friends push with great force against a rock. One friend pushes to the right
with 15 N of force. The other friend pushes in the opposite direction with 15 N of
force. Label the forces in the picture below.
The forces applied or exerted by the two friends will create an equilibrium force on the rock.
What are the two forces exerted by the tow friends?
The friend on the right will exert a rightward force
The friend on the left will exert a leftward force.
Since both forces are equal the rock will remain at equilibrium.
Equilibrium force refers to a state in which the net force acting on an object is zero, meaning the object is either at rest or moving at a constant velocity. This means that the sum of all forces acting on an object is equal to zero and there is no net acceleration. The object is said to be in a state of mechanical equilibrium.
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oxygen moves between the respiratory system and the circlatory system when it transfers from.. to...
Oxygen moves between the respiratory system and the circulatory system when it transfers from the bronchi to the capillaries. The correct option is d.
What is the respiratory system?The capillaries (small blood vessels) lining the alveolar walls allow oxygen to diffuse from the alveoli to the blood throughout this process.
Hemoglobin in red blood cells absorbs oxygen as it enters the bloodstream. Where the blood and lungs exchange gases are known as the "alveoli." Bronchi are the air passage of the lungs. It is a large passage that passes from the trachea to the lung.
Therefore, the correct option is d. bronchi, capillaries.
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The question is incomplete. The missing options are given below:
alveoli, capillaries
bronchi, trachea
capillaries, veins
bronchi, capillaries
A bus is moving at an average speed of 70 mph on the motorway. The journey takes 3 hours 30 minutes. How far did the bus travel?.
The bus travelled a total of 245 miles.
We can use the formula:
distance = time x speed
where:
Speed is measured in miles per hour (mph) or metres per second (m/s), and distance is measured in miles or meters.
Time is measured in terms of hours or seconds.
To calculate an object's speed, you must first know how far it has travelled and how long it took to travel that distance.
To calculate the distance that the bus travelled.
first we have to convert the time into hours.
3 hours and 30 minutes = 3.5 hours (since 30 minutes is half an hour).
Now we can use the formula:
distance = time x speed
245 miles = distance
= 70 mph x 3.5 hours
As a result, the bus travelled a total of 245 miles.
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How fast does a car travel in .75 hours if it’s moving at a constant sided of 45mi an hour
A battery management systems primary purpose is to ___.
A battery management systems primary purpose is to protect the cells from being operated in unsafe conditions.
The BMS's main objective is to safeguard the cells from hazardous operating situations. The BMS can also be used to monitor any battery irregularities and report status (such as battery life) to the user and/or powered (host) device. A battery pack, which is an assembly of battery cells electrically organized in a row by column matrix configuration, is under the control of a battery management system (BMS).
BMS is a piece of technology designed to deliver a targeted range of voltage and current for a period of time against anticipated load scenarios. With the maximum energy density, lithium-ion rechargeable cells are the appropriate option for battery packs in a wide range of consumer goods, from laptops to electric automobiles.
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what is the temperature in the mesa?
Mesa temperature is 65°F with a partly overcast sky and a SE wind speed of 5 to 10 mph according to the weather forecast.
The weather in Mesa, Arizona, in February. Daily high temperatures seldom drop below 59°F or rise over 82°F, rising by 5°F from 68°F to 73°F. Daily lows rise by 4°F, from 45 to 49, seldom dropping below 37 or rising beyond 56.
In Phoenix, most days in February reach temperatures of exceeding 60 °F (16 °C). This month, the city has seen temperatures in the 80s °F (above 27 °C) on an average of 4 days. Nonetheless, the temperature seldom rises beyond 90 °F (32 °C). On average, there are two evenings each week when the temperature drops to or below 40 °F (4 °C).
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An astronaut who fell into a black hole would be stretched be-causea. the gravity is so strong.b. the gravity changes dramatically over a short distance.c. time is slower near the event horizon.d. black holes rotate rapidly, dragging spacetime with them.
The correct option is B, An Astronaut who fell into a black hole would be stretched because the gravity changes dramatically over a short distance.
A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape. It is created when a massive star runs out of fuel and collapses under its own gravity. The intense gravity warps space and time, creating a point of singularity where all matter is compressed into an infinitely small, dense point.
The boundary around the black hole where the gravitational pull is so strong that even light cannot escape is called the event horizon. Anything that crosses this boundary is said to be swallowed by the black hole, never to be seen again. The study of black holes has led to new insights into the nature of space, time, and gravity, and has opened up new avenues of research in astrophysics and cosmology.
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What is the acceleration of gravity on Venus?
Answer:
8.87 m/s^2
Explanation:
Based on what you learned about telescopes, select all of the correct statements from the following list.
Option A. Radio telescopes usually make observations of very large regions of the sky. Option C. Radio telescopes are used to detect cool hydrogen. Option D. Radio telescopes have to be larger than optical telescopes, since radio waves are longer than visible light waves.
Option F. Radio waves can travel through obstacles that block out waves of visible light.
These statements are correct. The other two statements are incorrect. Interferometry can be used with radio telescopes to increase their resolution, and not all objects emit visible light, so radio telescopes can detect objects that are not visible in the optical spectrum. Radio telescopes are instruments used to detect radio waves emitted by astronomical objects in space. They are used to study a wide range of phenomena, from the cool hydrogen gas that permeates the universe to the high-energy radiation emitted by black holes and other exotic objects.
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Complete question:
Based on what you learned about radio telescopes, select all of the correct statements from the following list.
A. Radio telescopes usually make observations of very large regions of the sky.
B. The large size of radio telescopes make interferometery unnecessary.
C. Radio telescopes are used to detect cool hydrogen.
D. Radio telescopes have to be larger than optical telescopes, since radio waves are longer than visible light waves.
E. Since radio telescopes are so large, they have much better resolution than optical telescopes.
F. Radio waves can travel through obstacles that block out waves of visible light.
G. All objects emit visible light, so radio wavelengths just provide another way to look at them.
what is the second messenger in the g protein-coupled protein kinase pathway stimulated by epinephrine in liver cells?
The second messenger in the G protein-coupled protein kinase pathway stimulated by epinephrine in liver cells is cyclic AMP (cAMP).
The G protein-coupled protein kinase pathway is a signaling pathway that is stimulated by epinephrine in liver cells.
When epinephrine binds to its receptor on the cell membrane, it activates a G-protein, which in turn activates adenylyl cyclase.
This enzyme then produces cyclic AMP (cAMP), which is the second messenger in this pathway. cAMP binds to and activates protein kinase A, which then phosphorylates proteins in the cell to initiate a response.
This response can be the activation of certain enzymes, the inhibition of other enzymes, or the modification of gene expression.
cAMP is a key signaling molecule that is involved in many biological processes and is essential for the proper functioning of liver cells.
Without cAMP, cells would be unable to respond to epinephrine, and the G protein-coupled protein kinase pathway would not be activated.
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If the acceleration of an object is zero, then its speed must be what?
If the acceleration of an object is zero, then its velocity may not necessarily be zero. The object could still be moving with a constant velocity.
What is acceleration?Acceleration is a measure of the change in velocity of an object over time. It is a vector quantity and is defined as the rate of change of velocity with respect to time.
Acceleration has units of meters per second squared [tex](m/s^2)[/tex]in the SI system and can be calculated as the change in velocity divided by the change in time, or
a = (vf - vi) / t
where vf is the final velocity, vi is the initial velocity, and t is the time interval over which the velocity changed.
In physics, acceleration plays a key role in understanding the motion of objects and the forces that affect them. It is used in many fundamental equations, such as Newton's second law of motion, which states that the acceleration of an object is proportional to the net force acting on it.
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Fill The Blank! when a cloud forms, latent heat is ____ the atmosphere and the surrounding air temperature ____.
When a cloud forms, latent heat is released into the atmosphere and the surrounding air temperature decreases.
What is latent heat?Latent heat is the energy that a substance absorbs or releases during a change in its physical state (phase) but does not change its temperature. The latent heat involved in melting solids or freezing liquids is referred to as the "heat of fusion," while the latent heat involved in vaporizing solids or liquids or condensing vapor is referred to as the "heat of vaporization." The quantity of heat (in joules or calories) per mole or unit mass of the substance undergoing a change in state is the typical way to represent latent heat. The effort necessary to overcome the forces holding together atoms or molecules in a substance gives rise to latent heat.
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A biker has a PE of 360 J at the top of a hill. On the way down the hill, she lost 150 J to heat.
What is her KE at the bottom of the hill?
(Show work please)
The biker's kinetic energy at the bottom of the hill is 210 J.
What is the kinetic energy of the biker?The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.
So, as the biker travels down the hill, her potential energy (PE) transforms into kinetic energy (KE).
At the top of the hill, her PE is 360 J, and she loses 150 J to heat,
so her remaining energy is 360 J - 150 J = 210 J.
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Which of the following shows a change in velocity? Group of answer choices Wendy is riding her bike in a circle in the parking lot. Amber is sitting on a park bench. Ken is driving on Interstate 4 at 65 mph. Jessica is walking her dog along Chestnut Avenue.
Wendy riding her bike in a circle in the parking lot is a change in direction, but her speed is constant, so her velocity is not changing. Amber sitting on a park bench and Jessica walking her dog along Chestnut Avenue are both stationary, so there is no change in velocity.
What is Velocity?
It is defined as the change in position of an object over a unit of time, usually measured in meters per second (m/s) or kilometers per hour (km/h), in a specific direction.
In physics, velocity is distinguished from speed, which is the magnitude of an object's velocity but without regard to its direction. Velocity is a more precise term than speed because it includes both magnitude and direction. For example, a car traveling at 60 km/h east has a different velocity than a car traveling at 60 km/h west.
Velocity is a fundamental concept in many areas of physics, including mechanics, thermodynamics, and electromagnetism. It is used to describe the motion of objects ranging from subatomic particles to celestial bodies in the universe.
The only option that shows a change in velocity is Ken driving on Interstate 4 at 65 mph. This is because velocity is a vector quantity that includes both speed and direction. As Ken is driving, he is changing his direction or speed, or both, which means his velocity is changing.
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A stonecutter's chisel has an edge area of 0. 45 cm2. If the chisel is struck with a force of 46 n, what is the pressure exerted on the stone?.
The pressure exerted on the stone by the chisel is 1,022,222.22 Pa.
We know that
1 cm = 0.01 m, so 0.45 cm^2 = 0.45 x (0.01 m)^2 = 0.000045 m^2.
We can calculate the pressure exerted on the stone using the formula:
pressure = force / area
Substituting the given values, we get:
pressure = 46 N / 0.000045 m^2
pressure = 1,022,222.22 Pa (or N/m^2)
Pressure is the force exerted per unit area. It is a physical quantity that is crucial in a wide range of applications, including meteorology, engineering, and physics. Pressure can be defined as the amount of force exerted on a surface divided by the area of that surface. For example, when a person stands on a scale, the weight of their body is distributed over the area of the scale, creating pressure.
Pressure is typically measured in units of pascals (Pa), which is equivalent to one newton per square meter. Other units used to express pressure include atmospheres (atm), pounds per square inch (psi), and millimeters of mercury (mmHg). In fluids, pressure increases with depth due to the weight of the fluid above, and this principle is important in a wide range of applications, such as measuring blood pressure, designing water distribution systems, and predicting weather patterns.
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A cardiac defibrillator can be modeled as a parallel plate capacitor. When it is charged to a voltage of 2 kV, it has a stored energy of 1 kJ. What is the capacitance of the defibrillator?A2.5×10−4 FB5×10−4 FC2.5×10−1 FD5×10−1 FE1.0 F
A cardiac defibrillator can be modeled as a parallel plate capacitor, Capacitance of the defibrillator is 1 F. Hence, the correct option is (E).
The energy stored in a capacitor is given by the equation:
E = 1/2 * C * V^2
where E is the energy in joules, C is the capacitance in farads, and V is the voltage across the capacitor in volts.
We are given that the defibrillator has a stored energy of 1 kJ (1000 J) when charged to a voltage of 2 kV. Substituting these values into the equation, we get:
1000 J = 1/2 * C * (2 kV)^2
Simplifying this equation, we get:
C = 1000 J / (1/2 * (2 kV)^2) = 1 F
Therefore, the capacitance of the defibrillator is 1 F.
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Suppose a current-carrying wire has a cross-sectional area that gradually becomes smaller along the wire so that the wire has the shape of a very long, truncated cone. How does the drift speed vary along the wire? a. It doesn't change b. It slows down as the cross section becomes larger. c. It speeds up as the cross section becomes larger. d. More information is needed.
The drift speed varies along the wire It slows down as the cross-section becomes larger. So option b is correct.
The drift speed of charges in a current-carrying wire depends on the electric field, which is related to the potential difference (voltage) between the ends of the wire and the wire's resistance.
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area, according to Ohm's law.
In a wire that has a cross-sectional area that gradually becomes smaller along the wire, the wire's resistance would increase along the length of the wire due to the decrease in cross-sectional area.
This would cause the potential difference between the ends of the wire to decrease along the length of the wire as well.
As the potential difference decreases, the electric field and the drift speed of charges would also decrease. Therefore, the drift speed of charges in the wire would slow down as the cross-sectional area becomes larger.
So the answer is (b) it slows down as the cross section becomes larger.
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Suppose a 0. 5-kg mass on a spring that has been compressed 0. 1 m has elastic potential energy of 1. 2 j. What is the spring constant?.
The spring constant in this case is 240 N/m.
What is spring constant?
Springs are pliable mechanical devices that regain their previous shape after deforming, i.e. after being stretched or compressed. The well-known metal coil has evolved into an essential element in the modern world, appearing in everything from engines to appliances to tools to automobiles to medical equipment and even basic ball-point pens. The spring's ability to store mechanical energy accounts for its widespread use and applications. Its reactive spring force produces mechanical energy.Elastic potential energy stored in the spring is E = 1.20 J.
Compression in the spring is x = 0.1 m.
Let the spring constant be k.
From the expression of potential energy stored in the spring we have
E= ½ kx²
1.2 = ½ k × (0.1)² =240 N/m
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In the ocean surrounding Antarctica, there are fish that survive the cold water by using a molecule made of glycoproteins that circulates the blood and keeps it from freezing. Certain kinds of worms that live in the Arctic ocean also make antifreeze proteins that help them live in icy water.
answer choices
Divergent Evolution
Convergent Evolution
Coevolution
Convergent evolution
Fish living in the Antarctic and worms living in the Arctic both contain antifreeze proteins.
The process of convergent evolution is the separate emergence of similar characteristics by unrelated species in response to related selective pressures. Antifreeze proteins are produced by worms in the Arctic and fish in the Antarctic to help them both survive in the freezing waters. The proteins in the two species differ, but they both have the same purpose, which is to stop the blood and tissues from freezing. The fact that the fish and worms are not closely related and exist in various places of the earth makes this an exceptional example of convergent evolution. The development of antifreeze proteins in these species demonstrates the strong selective forces that occur in these harsh conditions and emphasises how adaptable living things are.
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how did the solar system form
The formation of the solar system was a complex and dynamic process that took place over millions of years.
It is believed that a nearby supernova explosion or shock wave triggered the collapse of this cloud, causing it to contract and spin faster. As it spun, the cloud flattened into a disk with a dense center, which eventually formed the Sun.
As the disk continued to spin, it began to cool and dust particles started to clump together, forming small grains. These grains collided and stuck together, gradually growing larger and forming planetesimals.
The inner planets, including Mercury, Venus, Earth, and Mars, formed from materials that were more heat-resistant, such as rocks and metals. The outer planets, including Jupiter, Saturn, Uranus, and Neptune, formed from materials that were more volatile, such as ices and gases.
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the volume of a gas held at constant temperature varies indirectly as the pressure of the gas. if the volume of a gas is 1200 cubic centimeters when the pressure is 200 millimeters of mercury, what is the volume when the pressure is 300 millimeters of mercury?
When the pressure is 300 mmHg, the gas has an 800 cc volume.
Boyle's second law is what?According to this, a gas's volume drops as pressure on it rises at a constant temperature. In other words, while the temperature and the quantity of molecules are both constant, Boyle's law states that volume is inversely proportional to pressure.
The answer to the dilemma is that at constant temperature, the relationship between the gas's volume (V) and pressure (P) is inverse.
V ∝ 1/P
or
V = k/P
V = 1200 cc when P = 200 mmHg
These values are put into the formula above to get the following results:
1200 = k/200
k = 240000
V = 240000/300
V = 800 cc.
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how did people’s general way of thinking change as a result of the scientific revolution?
The Scientific Revolution was a period of great change in the way people thought about the natural world and their place in it.
What is Scientific Revolution?Prior to this time, most people relied on tradition, religious doctrine, and ancient authorities for answers to their questions about the natural world. However, with the development of new scientific methods and technologies, there was a shift towards more empirical, evidence-based ways of thinking.One of the key changes brought about by the Scientific Revolution was a new emphasis on experimentation and observation. Scientists began to use instruments like telescopes and microscopes to observe the natural world more closely, and they developed new methods for collecting and analyzing data. This approach led to a greater emphasis on evidence-based reasoning, and it helped to promote the idea that scientific knowledge should be based on observable, repeatable experiments.The Scientific Revolution also had a profound impact on people's view of the universe and their place in it. Prior to this time, most people believed in a geocentric model of the universe, with the Earth at the center and the stars and planets revolving around it.
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