Answer:
the number of protons (atomic number) determines the chemical properties of the atom
Explanation:
Answer:
The number of protons in an atom determines its chemical properties.
Explanation:
An atom is composed of a nucleus and electrons that go around it. The nucleus is composed of protons with a positive charge and neutrons without charge, and the number of protons (atomic number) determines the chemical properties of the atom (element type)
To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are.
To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are C) smaller.
What is Relativistic speed?This is roughly 186,282 miles per second, or "c," the symbol for light speed in mathematics. Nothing in the universe can move faster than light, according to physicist Albert Einstein's theory of special relativity, which forms the foundation of much of modern physics.
Therefore, Relativistic speed is the rate at which relativistic effects are important for achieving the appropriate level of measurement precision for the event under study. The differences between values calculated by models that take relativity into account
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See full question below
To outside observers, the overall sizes of objects traveling at relativistic speeds are
To outside observers, the overall sizes of objects traveling at relativistic speeds are
A) larger.
B) the same size.
C) smaller.
consider a neutron star with a mass equal to the sun, a radius of 17 kmkm , and a rotation period of 1.0 ss . what is the speed of a point on the equator of the star? express your answer with the appropriate units.
The answer is 42300km. The gravitational field on the surface of a neutron star is about 2.0×1012 m/s2, about 2×1011 times that of the Earth.
Neutron stars form when giant stars run out of fuel and collapse. The central part of the star, the core, collapses, crushing each proton and electron into a neutron. Neutron stars are extreme objects with diameters of 10 to 20 km. Their density is 1017 kg/m3 (Earth's density is about 5×103 kg/m3, even white dwarfs have a density of one million times less). A small, very dense star composed almost entirely of densely packed neutrons. About 10 km radius (the size of Manhattan). Pulsar. A source of short radio bursts with precise timing. Probably a rotating neutron star. lighthouse model.
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the ability of the atmospheric pressure hypothesis to link the behavior of barometers with the behavior of siphons and vacuum pumps is an illustration of:
The ability of the atmospheric pressure hypothesis to link the behavior of barometers with the behavior of siphons and vacuum pumps is an illustration of Internal coherence.
Atmospheric pressure is nothing but the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. At sea level has a mean value of 101,325 pascals (roughly 14.6959 pounds per square inch).
Coherent is nothing but if there are two source and if their frequency and waveform are identical then they are coherent.
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Using the formula for 'Kinetic Energy, what is the kinetic energy for an
object that weighs 40g and moving at 10 m/s?
200 ms² is the kinetic energy for an object that weighs 40g and moving at 10 m/s.
What are kinetic energy ?Kinetic energy is the power that an object has had as a result of motion. To accelerate an object, a power must be supplied to it. To apply a force, we must exert effort. The power is transported to the object when work is accomplished, which causes it to move at a new, constant pace.
What makes kinetic energy so important?The capacity to perform work is unquestionably the most important characteristic of kinetic energy. Force acting on to an object while it is traveling is referred to as work. Energy and work are interchangeable because of their close relationship.
Briefing:Using Kinetic Energy Formula:
K.E = 1/2 mv²
K.E. = 1/2 * 40 * 10
K.E. = 200 ms²
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What net force is required to horizontally accelerate a 90 kg person from rest to 66 m/s in
1.3?
The net force required to horizontally accelerate a 90 kg person from rest to 66 m/s is 4596.3 N.
Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector quantities. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.
Given;
mass = 90 kg
initial velocity = 0
final velocity = 66 m/s
time = 1.3 sec
V = u + at
66 = 0 + a × 1.3
a = 66/1.3
a = 50.77 m/s²
F = ma
= 90 × 50.77 N
= 4596.3 N
Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.
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An object of unknown mass is initially at rest and dropped from a height h. It reaches the ground with a velocity v1. The same object is then raised again to the same height h but this time is thrown downward with velocity v1. It now reaches the ground with a new velocity v2. How is v2 related to v1?.
The relationship between the two speeds v1 and v2 is v2=v1√2 when an
object of unknown mass is initially at rest and dropped from a height h
The given parameters;
initial velocity of the object, u = 0
object height = h
final velocity = v1
initial velocity for the second movement, = v1
final speed of the object in the second movement, = v2
The relationship between the initial speed and the final speed is given below;
For the first movement;
v1^2 = v0^2+2gh
v1^2 = 2gh
For second motion;
v2^2 = v1^2+2gh
Relationship between the two speeds;
v2^2 = v1^2+v1^2
v2=√2v1
Thus, the relationship between the two speeds v1 and v2 is v2 = √2v1
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A firefighter directs a stream of water from a fire hose at an angle of 40.0° above the horizontal. If the velocity of the stream is 39.0 m/s, what is
the furthest he can stand from the building and still hit it with water? t = Vy/g and x = Vx*2t
Firefighter can hit with water while standing at distance of 153 m from building.
What is a projectile motion?The projectile travels the path with a parabolic trajectory due to the effect of gravity. No horizontal forces so there is no horizontal acceleration.
The velocity of a projectile has horizontal component and the vertical component.
The vertical component of the velocity, [tex]\displaystyle V_y = Vsin\theta[/tex]
The horizontal component of the velocity, [tex]\displaystyle V_x = Vcos\theta[/tex]
Given the angle θ with the X- axis = 40°
The velocity of the stream V = 39 m/s
The Y component of the velocity, Vy = 39× sin 40°
Vy = 25.1 m/s
The X component of the velocity, Vx = 39× cos 40°
Vx = 29.88 m/s
The time , t = Vy/g = 25.2/9.8 = 2.56 sec
The distance from the building, [tex]x = V_x\times 2t[/tex]
x = 29.88 ×2×2.56
x = 153 m
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A lion with a mass of 190 kg is chasing a gazelle with a mass of 15 kg. The distance between the lion and the gazelle is 2 meters. A. How much gravitational force does the lion exert on the gazelle? b. How much gravitational force does the gazelle exert on the lion? remember to identify all data (givens and unknowns), list equations used, show all your work, and include units and the proper number of significant digits to receive full credit.
A lion with a mass of 190 kg is chasing a gazelle with a mass of 15 kg. The distance between the lion and the gazelle is 2 meters. Both will exert an equal and opposite force on each other of value 4752.4 * [tex]10^{-11}[/tex] N
Gravitational Force = G m1 * m2 / [tex]r^{2}[/tex]
= 6.67 * [tex]10^{-11}[/tex] * 190 * 15 / 4
= 4752.4 * [tex]10^{-11}[/tex] N
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The graph represents the reaction 2H₂ +0₂2H₂0 as it reaches
equilibrium. Based on the graph, which two statements about this reaction
are true?
Concentration (mol/L)
2
Time (s)
3
4
- H₂0
0₂
H
Options C and D on the graph, are the two statements about this reaction
are true.
In a chemical reaction, chemical equilibrium is the kingdom wherein both the reactants and products are found in concentrations that don't have any further tendency to change with time so that there is no observable exchange within the houses of the device.
Chemical equilibrium is the state in which both the reactants and merchandise are present in concentrations that have no similar tendency to alternate with time so that there is no observable alternate within the homes of the device.
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a 8-kg object moves down vertically a distance of 3 m. its potential energy has changed by approximately how much?
A 8-kg object moves down vertically a distance of 3 m. its potential energy has changed by approximately it has increased by 24 J.
What is Potential Energy?
An item may store energy according to its location, as we all know.In the instance of a bow and arrow, the bow stores some energy as it is drawn, and this energy is what gives the arrow its kinetic energy when it is released.Similar to this, a spring accumulates energy as it is moved away from its equilibrium state, which we can notice by the tension our hands experience when we stretch it. Potential energy is a type of energy that is created when anything changes position or condition.However, Let's study the definition of potential energy and its formula before moving on to instances and the potential energy unit.
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if two objects, each with a mass of 4.1x10^2 kg, produce a gravitational force between them if 9.2x10^-6 N, what is the distance between them?
Taking into account the Universal Law of Gravitation, the distance between the objects is 1.10396×10⁻⁶ m².
Universal Law of GravitationThe Universal Law of Gravitation establishes that bodies, by the simple fact of having mass, experience a force of attraction towards other bodies with mass, called gravitational force.
This law states that the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance that separates them, expressed as:
[tex]F=G\frac{Mm}{d^{2} }[/tex]
where:
G is the universal gravitational constant, with a value of 6.67×10⁻¹¹ [tex]\frac{Nm^{2} }{kg^{2} }[/tex].M and m are the masses of the bodies that interact.d is the distance that separates them.Distance between two objectsIn this case, you know:
F= 9.2×10⁻⁶ NG= 6.67×10⁻¹¹ [tex]\frac{Nm^{2} }{kg^{2} }[/tex]M= m= 4.1×10² kgd= ?Replacing in the Universal Law of Gravitation:
[tex]9.2x10^{-6} N=6.67x10^{-11}\frac{Nm^{2} }{kg^{2} } \frac{4.1x10^{2} kgx 4.1x10^{2} kg}{d^{2} }[/tex]
Solving:
9.2×10⁻⁶ N÷ 6.67×10⁻¹¹ [tex]\frac{Nm^{2} }{kg^{2} }[/tex]= [tex]\frac{4.1x10^{2} kgx 4.1x10^{2} kg}{d^{2} }[/tex]
1.3793×10⁻¹⁷ kg²÷m²= [tex]\frac{168100 kg^{2} }{d^{2} }[/tex]
1.3793×10⁻¹⁷ kg²÷m²× d²= 168100 kg²
d²= 168100 kg²÷ 1.3793×10⁻¹⁷ kg²÷m²
d²= 1.2187341×10⁻¹² m²
d= √1.2187341×10⁻¹² m²
d= 1.10396×10⁻⁶ m²
Finally, the distance is 1.10396×10⁻⁶ m².
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What do we now believe is responsible for the canals observed on mars in the nineteenth and early twentieth centuries?.
We now think that the canals seen on Mars in the late nineteenth and early twentieth century were the result of optical illusions.
The canals of Mars, which appeared to be systems of long, straight lines on the surface of Mars, are now understood to be illusions caused by the unintentional alignment of craters and other natural surface features that are seen in telescopes close to their resolution limit. They sparked a lot of debate and influenced how people perceived the possibility of life beyond Earth in the late 19th and early 20th centuries.
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The value of gravitational potential energy
A) can vary depending on the zero point
B) is always measured from the center of the Earth
C) is fixed for a specific height
D) depends only on the height above the Earth's surface
What type of a wave is light? A.electromagnetic
B. Mechanical
Answer:
A
Explanation:
Visible Light is generally considered part of the electromagnetic spectrum
The same girl in number 3 (above) pushes another friend on the same skateboard.
If she pushes her friend with 60 N of force and the girl accelerates at 2.1 m/s² then
what is her friend's mass?
The mass of her friend is 28.57.
Force is a push or pulls upon an item because of the object's interaction with some other object. pressure is a power that can exchange the motion of an object. A force can reason an object with mass to alternate its speed, i.e., to boost up. pressure also can be described intuitively as a push or a pull. A force has each significance and course, making it a vector amount.
Calculation:-
given;
mass = ?
acceleration = 2.1 m/s
force = 60 N
Force = mass × acceleration
mass = force/acceleration
= 60 /2.1
= 28.57 kg
The phrase 'Force' has a unique meaning. At this degree, it is absolutely appropriate to describe a force as a push or a pull. A force is not something that an object consists of or 'has in it. A force is exerted on one object through another. The concept of a force isn't always restricted to living matters or non-living matters.
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different objects sitting around in a room feel warmer or cooler. if they are in thermal equilibrium, what must be true of their temperatures?
To learn the equilibrium and temperature.
What is equilibrium?
When Newton's first law is true, the equilibrium state of an object is present. When all external forces (including moments) operating on an object in a reference coordinate system are equal, the object is said to be in equilibrium. The net effect of all external forces and moments acting on this object is zero as a result.
What is temperatue?
Temperature is a unit of measurement that can be expressed on a variety of scales, including Fahrenheit and Celsius. Temperature shows the direction of the spontaneous movement of heat energy, i.e., from a hotter body (one with a higher temperature) to a colder body (one with a lower temperature).
Their temperatures must be equal if two bodies are in thermal equilibrium.
As for coldness or warmth, we generally observe that metals feel colder while non metallic objects don't (i.e. comparatively they feel warmer than metals). This is due to the fact that metals are good conductor of heat. So when we touch a metallic body, heat flows from our body and is transferred to other points of the metal object. Since our body loses heat, we feel cold. In non metals, this conduction of heat from point of contact to other locations does not happen.
Therefore, the amount of heat loss from our body is much smaller. So we don't feel that cold.
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Four ample of teel, lead, alcohol and gla all have the ame ma and are all initially at 20 °C. After 100 calorie of heat i added to each ample, the final temperature are 38. 2 °C for the teel, 85. 6 °C for the lead, 23. 4 °C for the alcohol, and 30 °C for the gla. Which of thee four material ha the larget pecific heat capacity?
The larget specific heat capacity is the alcohol. Option A.
The specific heat of a substance is the heat capacity of a sample of the substance divided by the mass of the sample, sometimes called the mass heat capacity. Water has a very high specific heat. That means it has to absorb a lot of energy before the temperature changes.
On the other hand, sand and asphalt have low specific heat. This means that the temperature changes faster. The temperature rise in milk is higher because the specific heat of water is greater than that of milk. Water has the highest specific heat capacity that any liquid can produce. Specific heat is defined as the amount of heat that one gram of material must absorb or release to change its temperature by one degree Celsius.
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Question 2 of 10
Which of the statements below about buoyancy is true?
A. Buoyancy pushes objects down, in the same direction as gravity.
B. Buoyancy is a force that acts on objects that are placed in a fluid.
C. All objects that experience the force of buoyancy float.
D. If the buoyant force is greater than the force of gravity, the object
will sink.
B is the one
Buoyancy or Buoyant force is the force which acts on the objects that are placed in a fluid. Thus, the correct option is B.
What is Buoyant force?
The buoyant force or buoyancy is the upward force that is exerted on an object which is fully or partially immersed in a fluid. This upward force is also called Up-thrust. Due to buoyant force, a body that is submerged in a fluid appears to lose its weight in the fluid, i.e. appears to be lighter. The factors which affect buoyant force are volume of the fluid displaced and the volume of the body that is submerged in fluid.
An example where buoyant force can be observed is a ship which is floating in the middle of the sea, an anchor that sinks when thrown in the water, and a fish which is hovering in the middle of the waterbody.
Therefore, the correct option is B.
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on the basis of your answer to part c, would you say that the friction force is conservative or nonconservative?
Due to the fact that the work relies on the chosen path, friction is non-conservative. a force that prevents two solid objects from rolling or sliding over one another.
How to describe frictionfriction is the resistance to a thing moving or rolling over another solid object. Although frictional forces can be advantageous, such as the traction required to walk without slipping, they also provide a significant amount of resistance to motion.
What leads to friction?Because of the imperfections on the two surfaces in contact, friction is produced. Small imperfections can be found on even the smoothest surfaces, and when two surfaces interact with one another, they cause friction.
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The light given off from a candle is which method of heat transfer
Convective heat transmission creates the thermal plume of the candle. The main method of heat energy transport in a home or structure is convection.
What is Principles for Heat Transfer?Three processes—conduction, radiation, and convection—transfer heat from and to objects, including you and your house. Heat transfers through solid materials by conduction. On hot days, heat is transferred into your house through the walls, windows, and roof.
What are the following 3 facts concerning heat transfer?There are three major ways that heat energy can be moved from one location to another. The movement of matter particles carries heat energy in CONVECTION. Particle vibration in CONDUCTION transfers heat. Electromagnetic waves directly transport heat in RADIATION.
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A golfer swings the club with a force of 6,000 N. If the club makes contact with the golf ball for only 0.18 s, then what impulse is given to the golf ball?
Work out and use units
The impulse given to the ball by the golfer with a club is 1080 Ns.
What is impulse?Impulse can be defined as the product of force and time.
To calculate the impulse given to the ball, we use the formula below.
Formula:
I = Ft.......... Equation 1Where:
I = Impulse given to the ballF = Force applied to the ballt = TimeFrom the question,
Given:
F = 6000 Nt = 0.18sSubstitute these values into equation 1
I = 6000×0.18I = 1080 NsHence, the impulse given to the ball is 1080 Ns.
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If a flight is made from an area of lower pressure into an area of high pressure without the altimeter setting being adjusted, the altimeter will indicate
a) the actual altitude above sea level.
b) higher than the actual altitude above sea level
c) lower than the actual altitude above sea level.
If a flight is made from an area of lower pressure into an area of high pressure without the altimeter setting being adjusted, the altimeter will indicate option c - lower than the actual altitude above sea level.
When flying from a lower pressure area to a high-pressure area, the aircraft's altitude gradually rises while the altimeter remains constant; thus, the ALTIMETER indicates a lower altitude than the aircraft is actually flying. The quantity of gas particles with in air reduces as height increases atmosphere becomes less dense than air nearer to ocean level. It's what weathermen and mountain climbers refer to when they speak regarding "thin air." Thin air imposes fewer pressure than lesser air.
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What would happen to the gravitational force felt between two objects if the radius between them were doubled?.
The force of gravitational attraction is reduced by a factor of 4 when the separation distance between two objects is doubled (increased by a factor of 2).
What is gravitational force?The gravitational force, which is what pushes mass-containing objects toward one another. We frequently consider the pull of gravity from the Earth. Your body is kept on the ground by this force. However, all mass-bearing objects are pulled toward one another by gravity.
Greater gravitational forces will be used to attract heavier things since the gravitational force is directly proportional to the mass of both interacting objects. Therefore, the gravitational attraction between two objects grows as their respective masses do as well. The force of gravity between two objects is equal to their respective masses multiplied by two. If one of the items triples in mass, the gravitational pull between them will also triple.
What is radius?The radius of a circle is the separation between its center and circumference. Always, the diameter is twice the radius. As a result, the formula is created by multiplying the diameter by two.
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where are the turning points of the motion? express your answers in meters. enter your answers separated by a comma.
When K = 0, the motion's turning points take place. Think about frictionless one-dimensional motion in the x-direction. So whenever Etotal = U, K(x) = 0 and v = 0. (x).
How to describe frictionfriction is the resistance to a thing moving or rolling over another solid object. Although frictional forces can be advantageous, such as the traction required to walk without slipping, they also provide a significant amount of resistance to motion.
What leads to friction?Because of the imperfections on the two surfaces in contact, friction is produced. Small imperfections can be found on even the smoothest surfaces, and when two surfaces interact with one another, they cause friction.
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What evidence do we have that the martian atmosphere was denser in the past than it is today?.
The abundance of argon by mass is 1.6% and we have observed dry stream beds and outflow channels.
An atmosphere is a layer of gas or layers of gas that surround a planet and are held in place by the gravity of the planetary body (from the Ancient Greek (atoms) "vapour, steam" and (sphere) "sphere"). When the gravity is strong and the temperature of the atmosphere is low, a planet preserves its atmosphere. The outer part of a star, which includes the layers above the opaque photosphere, is known as the stellar atmosphere; low-temperature stars may have outer atmospheres with complex molecules.
Nitrogen makes up 78% of the atmosphere of Earth, along with oxygen (21%), argon (0.9%), carbon dioxide (0.04%), and trace gases. Most of the living things use oxygen to breathe.
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What is the 4 step design thinking process?.
Despite the fact that design is frequently thought of as the domain of creatives who (we have been led to believe) prefer an overall lack of structure, design thinking is very much a structured activity.
This structured activity deliberately organized systemic approach to creative problem solving is significant for a number of reasons. The group gains trust and becomes more capable of handling situations methodically. Going in order and continuing the process are essential because each step has a distinct output that the subsequent activity depends on. Additionally, no need of any coding or Photoshop experience to start using a design thinking framework. It is intended for diverse teams to be able to contribute to the steps and the process at every stage.Design thinking is crucial for a variety of reasons and aids in the design process.It assists in maintaining that people are the process' central component.It eliminates any uncertainty regarding your client's needs.It enables you to rank your top priorities for solutions.It fosters a "yes, and..." mindset during brainstorming, which leads to revolutionary ideas.By enabling the team to experiment more and fail more quickly, it aids in the learning process for teams.It's adaptable, letting you go back and forth through the steps to prototype and iterate more quickly.But design thinking is also significant from a commercial standpoint.It promotes putting the needs of the customer before anything else.It reveals information gaps about your users in business intelligence.When effectively addressed, it reveals the client's pain points and aids companies in reducing friction associated with actions (like making purchases!).By providing advice on what to avoid, it helps people save time and money.To know more about design thinking framework-
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a 77.3-kg man is traveling upward in an elevator at a constant velocity of 9.9 m/s. what is the normal force acting on him?
The normal force acting on a 77.3-kg man is traveling upward in an elevator at a constant velocity of 9.9 m/s is 757.54 N
∑ Fy = m a
Fn - Fg = m a
Fg = m g
Fg = Force of gravity
m = Mass
g = Acceleration due to gravity
Fn = Normal force
m = 77.3 kg
g = 9.8 m / s²
Fg = 77.3 * 9.8
Fg = 757.54 N
Since velocity is constant, a = 0
Fn - Fg = 0
Fn = Fg
Fn = 757.54 N
Therefore, the normal force acting on him is 757.54 N
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A 57.0 kg woman is in an elevator accelerating upward at 1.25 m/s². What is the normal force acting on her? [?] N Don't forget her weight!
Answer:
The normal force 630.4 N
Explanation:
Given:
m = 57.0 kg
a = 1.25 m/s²
g = 9.81 m/s²
___________
N - ?
Since the elevator is moving with acceleration UP, the reaction of the support:
N = m· (g + a)
N = 57.0·(9.81 + 1.25) ≈ 630.4 N
to remove the refrigerant from a system without any testing or processing and to be put back into the same system is called .
To remove the refrigerant from a system without any testing or processing and to be put back into the same system is called recovery.
Recover means to remove refrigerant in any condition from an appliance and to store it in an external container without necessarily testing or processing it in any way. Recovery efficiency means the percentage of refrigerant in an appliance that is recovered by a piece of recovery and/or recycling equipment.
In the vapor recovery method, the refrigerant is removed from the HVAC system in a vapor state. The vapor is then condensed into a liquid by the recovery unit and transferred to the recovery cyclinder.
To put it as simply as possible, refrigerant recovery refers to the transfer of a system's refrigerant into a refillable refrigerant cylinder during repairs or replacement of the air-conditioning system. By looking into refrigerant recovery, you can prevent refrigerants from leaking and releasing into the atmosphere.
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what is the resistance of the third resistor? express your answer to two significant figures and include the appropriate units.
Total resistance of resistors is sum of all resistors.
Total resistance in series is R1 + R2 + R3.
Total resistance in parallel is 1/R1 + 1/R2 + 1/R3.
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega.
An easier way to explain resistance is to consider an example of a person in a crowded market struggling to go from one shop to another. This situation is certainly similar to an electron trying to make its way through a wire.
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