A system which undergoes an adiabatic change. The work done and the change in the internal energy are: W>0, AE > 0 (option d)
Adiabatic process is a thermodynamic process in which no heat goes into or out of a system and all internal energy is changed by work.
Adiabatic operations are frequently carried out in an insulated container, where the process occurs too quickly for heat to be transferred. Because heat transfers due to a temperature difference between a system and its surroundings, an adiabatic process can occur even when the system is in thermal equilibrium.
The first law of thermodynamics is:
ΔU = Q + W
Where:
ΔU = change in internal energy
Q = heat transfer
W = work done
In the given problem, the internal energy is represented by AE, hence, we can write:
AE = Q + W
Since there is no change in heat energy, Q = 0, therefore,
AE = W
The work done in an adiabatic process is positive. Therefore, the correct answer is W>0, AE > 0 (option d)
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A mixture of sand, salt, and sawdust was stirred in the water and the mixture was allowed to stand.
a) How might you collect the pure substance?
b) What is the sediment that forms?
c) the clear liquid was poured off and divided into 2 parts. One part was evaporated and the other was distilled.
1) what substances would be collected by distillation?
2) what would be collected by distillation?
3) what difference in properties allows the separation in both evaporation and distillation.
Give the answer and the reason and I will mark you as the brainiest whoever answers this.
Answer:
Explanation:
a) To collect the pure substance, you could use a separation technique such as filtration to remove the solid mixture of sand, salt, and sawdust from the water. The pure substance in this case would be the water.
b) The sediment that forms is the mixture of sand, salt, and sawdust that settles to the bottom of the container after the mixture is allowed to stand.
C)
1. If the clear liquid that was poured off is distilled, the substances that would be collected would depend on the boiling points of the substances present in the liquid. Substances with lower boiling points will vaporize and be collected first, while substances with higher boiling points will be collected later.
2. If the clear liquid is evaporated, the substance that would be collected is the liquid itself, in a more concentrated form.
3. The difference in properties that allows separation in both evaporation and distillation is the difference in boiling points of the substances present. In evaporation, the liquid with the lowest boiling point will evaporate first, while in distillation, the substance with the lowest boiling point will be vaporized and collected first.
What is the 3rd Law of coilation?
1. Bounce
2. Gravity
3. Re-flux
Answer:
Re-flux
Explanation:
Calculate the magnitude of the impulse applied to a 0. 75-kilogram cart to change its velocity from 0. 50 meter per second east to 2. 00 meters per second east. [show all work, including the equation and substitution with units. ].
The impulse's strength would be 1.125 N s in the direction of the east.
We are given that,
Final velocity =V final = 2.00m/s
Initial velocity = V initial = 0.50m/s
ΔV = V final - V initial
ΔV = 2.00 - 0.50
ΔV = 1.50 towards East
Therefore , impulse can be calculated as ,
impulse = change of linear momentum
impulse = mass × change in velocity
impulse = 0.75 ×1.5
impulse = 1.125 N s towards East
Therefore, the impulse's strength would be 1.125 N s in the direction of the east.
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Impulse's strength would be 1.125 N s in the east direction.
As per the given information:
Final velocity =V final is 2.00m/s
Initial velocity = V initial is 0.50m/s
ΔV = V final - V initial
ΔV = 2.00 - 0.50
ΔV = 1.50 towards East direction
The total impulse can be calculated as ,
Impulse = change of linear momentum
Impulse = mass × change in velocity
Impulse = 0.75 ×1.5
Impulse = 1.125 N s towards East
Hence, the impulse's strength would be 1.125 N s in the direction of the east.
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What is the kinetic energy of translation of one molecule of a gas at 300 K?
The kinetic energy of translation of one molecule of a gas at 300 K is 6.21 × 10⁻²¹ J.
Given that,
Temperature of ideal gas = 300 K
The kinetic translational energy of an ideal gas is mathematically given as,
Kinetic energy = 3/2 Kb × T
where,
Kb is Boltzmann constant
T is the temperature of the gas
Placing the values in the above formula, we have
⇒ 3/2 × 1.38× 10⁻²³ × 300 m² kg s⁻² K⁻¹ = 621 × 10⁻²³ J = 6.21 × 10⁻²¹ J
Thus, the required kinetic energy of translation of one molecule of a gas at 300 K is 6.21 × 10⁻²¹ J.
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Mr. Starr pushed a cart full of groceries to his car. After emptying the cart, he pushed it back to the store. He pushed the cart
at a speed of 2 meters per second each way. Which is the best prediction? (1 point)
The cart had the same kinetic energy going each way.
The cart's kinetic energy depends on Mr. Starr's mass.
When it was empty, the cart had less kinetic energy.
When it was full, the cart had less kinetic energy.
Answer:
The shopping cart has less kinetic energy when it is empty.
Explanation:
When an object of mass [tex]m[/tex] travels at a speed of [tex]v[/tex], the kinetic energy of that object would be [tex](1/2)\, m\, v^{2}[/tex].
In this question, the speed of the shopping cart is fixed ([tex]v = 2\; {\rm m\cdot s^{-1}}[/tex].) Kinetic energy would be proportional to the mass [tex]m[/tex] of the shopping cart (including that of its contents.)
The mass of the shopping cart is lower when it is empty on the way back to the store. Therefore, the kinetic energy of the shopping cart would also be lower than when it was full.
Answer:
(Question) A city gets its electricity from a dam, where water is stored in a reservoir. How does the water provide the city with its power?
(Answer) Potential energy in the water becomes kinetic energy as it moves through turbines, which turn kinetic energy into mechanical energy that spins a generator, which changes mechanical energy into electricity.
(Question) An acorn rolls off a roof and falls to the ground. Which statement best describes the change in energy?
(Answer) The acorn’s potential energy decreases as its kinetic energy increases.
(Question) An airplane carries 320 passengers from Phoenix to Los Angeles flying at an average speed of 490 miles per hour. On the return flight, the plane carries 164 passengers and travels at the same average speed. What happens to the plane’s kinetic energy?
(Answer) On the return flight, the plane has less kinetic energy.
(Question) A racehorse is running at 42 miles per hour, equivalent to 18.8 meters per second. The horse and its jockey have a combined mass of 512 kilograms. How much kinetic energy do they have?
(Answer) 90,480.6 J
(Question) Which object has kinetic energy?
(Answer) balloon rising in the sky
(Question) Mr. Starr pushed a cart full of groceries to his car. After emptying the cart, he pushed it back to the store. He pushed the cart at a speed of 2 meters per second each way. Which is the best prediction?
(Answer) When it was empty, the cart had less kinetic energy.
(Question) A student fires a toy rocket into the sky. When does the rocket have the most potential energy?
(Answer) when the rocket reaches its highest point
(Question) What is the best description of one billiard ball hitting a second billiard ball?
(Answer) Most of the kinetic energy in the first ball is transferred to the second ball.
(Question) A roller-coaster car is at the top of a hill. The car and its passengers have a combined mass of 1,088 kilograms. If the hill is 62 meters tall, how much potential energy does the car have?
(Answer) 661,068.8 J
(Question) A roller-coaster is at the top of a 62-meter hill. The car and its passengers have a total mass of 1,088 kilograms. By the time the car reaches the bottom of the hill, its speed is 74 miles per hour (33 meters per second). How much kinetic energy does the car have at the bottom of the hill?
(Answer) 592,416 J
(Question) A diagram is drawn showing a swing set with a swing pulled backward prior to release. The diagram shows how the swing will move forward and then backward after it is initially released. At which point in the diagram is all of the energy gravitational potential energy?
(Answer) when the swing is pulled back prior to release
(Question) essay
(Answer) good luck
(Question) essay
(Answer) good luck
Explanation:
I just completed this assignment UwU
If skater has 2000 joules of energy of potential energy at 4m how much energy the skater have at the bottom of the ramp
The kinetic energy of the skater at the bottom of the ramp is 2000 J.
What is the law of conservation of energy?The law of conservation of energy states energy can neither be created nor destroyed but can be converted from one form to another.
Mathematically, the formula for conservation of energy mechanical energy is given as;
P.E ( top ) = K.E ( bottom)
where;
P.E ( top ) is the potential energy of the object at the maximum heightK.E ( bottom ) is the kinetic energy of the object at bottom of the ramp.In the absence of friction, the potential energy of the skater at the maximum height is equal to his kinetic energy at the bottom of the ramp.
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A television that is 83% efficient provides 4,600J of useful energy.
How much energy does it use?
Answer: 5542J (rounded)
Explanation:
we need to work out 100% energythat is done by dividing 4600 by 834600/83 = 55.42155.421 x 100=5542.168I dont know what you need to round your answer to but 5542.168 is my final answer5.40×10^21 electrons flow through another appliance in 3.0minutes.
How much charge goes through the appliance?
a 0.5kg mass on a 1 m long string swings in a circle on a horiontal frictionless table at a steady speed of 2m/s. how much work does the tension on the string do on the mass
0 joule work done does the tension in the string do on the mass during one revolution.
What is a joule equal to?One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). One newton equals a force that produces an acceleration of one meter per second (s) per second on a one kilogram (kg) mass.
What is the value of 1 unit in joule?Let us calculate the value of 1 unit of electrical energy in terms of the SI unit of energy which is joules. Converting the equation in terms of energy gives us: Energy consumed=Power×Time. One unit of electrical energy is equal to 3.6×106J of energy.
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Physical causes of stress include ______. Check all that apply. A. anger. B. malnutrition. C. intense exercise. D. infection infection. E. grief.
Physical causes of stress include (B) malnutrition and (C) intense exercise.
As it is reported, malnutrition is a potent stress inducer that raises cortisol levels and has catabolic effects. Additionally, a lack of meals lessens the insulin-dependent anabolic activity of tissue synthesis.
Physical activity can strengthen your bones and muscles, help you maintain a healthy weight, increase your ability to carry out daily tasks, and improve your cognitive health.
Intense exercise can trigger a stress response by placing psychological and physical demands on the body, which can activate the sympathetic-adrenomedullary and hypothalamus-pituitary-adrenal (HPA) axes and cause the release of catabolic and stress hormones, inflammatory cytokines, and microbial molecules.
So the right options among the given are (B) malnutrition and (C) intense exercise.
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A substance that heats up relatively quickly has a low specific heat capacity. Select one: O True O False
As the given statement is False. As a substance that heats up relatively quickly must has a high specific heat capacity.
What is specific heat capacity?A physical property of matter is specific heat capacity. The quantity of heat energy required to raise a substance's temperature per unit of mass is known as the specific heat capacity. It serves as an illustration of a large property. Since the scale of the system under study directly affects it. Therefore, it is the amount of heat absorbed by the substance per unit mass when its temperature is elevated. Specific Heat Capacity is measured in J/(kg K) or J/(kg °C) units.
As heating is quick when the substance have high specific heat capacity and the heating will be slow when the substance have less specific heat capacity.
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What is the displacement for 9 meters north and 12 meters west
Answer:
15 meters
Explanation:
Displacement is a vector quantity that describes the change in position of an object. In this case, the displacement is the change in position of an object that has moved 9 meters north and 12 meters west.
To find the displacement, you need to find the resulting change in position of the object. This can be done by drawing a vector diagram and finding the vector that represents the net change in position.
To do this, you can draw a coordinate grid and mark the starting position of the object at the origin (0,0). Then, draw a vector that points 9 meters north and another vector that points 12 meters west. The displacement vector is the vector that connects the starting position to the final position, which is the sum of the two movement vectors.
In this case, the displacement vector would point in a direction that is slightly northwest of due west. Its length could be calculated using the Pythagorean theorem:
displacement = squaeroot((9^2) + (12^2))
displacement = 15 meters
So, the displacement of the object that moves 9 meters north and 12 meters west is 15 meters.
Name two types of natural disasters that often occur at plate boundaries
Answer:
Earthquakes and tsunamis
suppose the distance from the lens system of the eye (cornea + lens) to the retina is 17 mm.
A) The power of the lens be when looking at distant objects is 58.823 D
B) The power of the lens be when looking at an object 20.0 cm from the eye is 63.823 D
According to the Dictionary of Ophthalmic Optics, the definition is stated thus: “The straight line measurement in millimeters (z axis) from the back or ocular surface vertex of a mounted spectacle lens to the apex of the cornea.” For a more practical definition, it is the straight line distance in millimeters from the back surface of any lens (mounted in spectacles or not) to the apex of the cornea.
(a) Power 1/p
= 1/f
= 1/ .017 m
= 58.823 D
(b) 1/q + 1/p
= (1/0.20 m) + (1/.017 m)
= 63.823 D
The given question is incomplete, the complete question is
Suppose the distance from the lens system of the eye (cornea +lens) to the retina is 17 mm.
(a) What must the power of the lens be when looking at distant objects?
(b) What must the power of the lens be when looking at an object 20.0 cm from the eye?
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A white pool ball of mass 200g is hit with a velocity of 1.6ms^-1 and collides with a stationary
striped ball of the same mass.
If the striped ball moves off with a velocity of 1.9ms^-1
then calculate or find:
a) Velocity of the white ball after the collision
Multiple Choice: Identify the choice that best completes the statement or answe
Which item would have more inertia?
1.
a. truck
b. paper
c. baseball
d. cat
The best item that would have more inertia is a truck. The correct option is a.
What is inertia?A feature of matter known as inertia is the ability to maintain either a state of rest or uniform motion in a straight line without the assistance of an external force. Case Studies of the Law of Inertia in Daily Life (Inertia of Motion) People slump forward when the bus abruptly stops.
The top part of the body continues to move forward due to inertia of motion when the driver of a bus abruptly brakes, but the bottom section of the body comes to rest along with the bus.
Therefore, the correct option is a. truck.
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a man traveled 2.2 in to the store in 5.0 minutes and then stayed at the store for 10.0 minutes. he than traveled 6.1 kn to the bank in 12 minutes and stayed in the bank for 5.0 minutes. he than travelled 4.7 km to his home in 7.0 minutes. what was his average speed in units of km/min
The speed of the man is obtained as 0.54 Km/min.
What is the average speed?One of the first things that must come to our minds is that fact that speed is a scalar quantity and as such we do not look at the direction of the movement of the object but just the algebraic sum.
We then have that;
Total distance = 2.2 + 6.1 + 4.7 = 13 Km
Total time = 5 + 12 + 7 = 24 min
Note that we do not count the times that were spent in the store without moving
The speed is now; = 13 Km/24 min
= 0.54 Km/min
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What used to indicate the beginning of the solar system formation?
The beginning of solar system development is most likely indicated by the big bang theory. An explanation for how the universe grew from a high density starting state is provided by the Big Bang theory.
And temperature. The evolution of the observable universe from the earliest known times through its later large-scale form is explained by a variety of cosmological models of the Big Bang theory. The Sun and the things that circle it make up the solar system, which is gravitationally bound. The gravitational collapse of a massive interstellar molecular cloud gave it birth 4.6 billion years ago. 99.86% of the system's mass is in the Sun, with the planet holding the majority of the remaining mass.
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The nebular hypothesis is the most widely recognized cosmogony theory to explain how the Solar System started and evolved (as well as other planetary systems). It implies that gas and dust orbiting the Sun are what created the Solar System.
What has science discovered to be the strongest proof of the solar system's age?Over 70 different types of meteorites have undergone radiometric dating to ascertain their ages. The findings suggest that between 4.53 and 4.58 billion years ago, the Solar System and meteorites both began to develop.
What are the 4 phases of the development of the solar system?Scientists believe that the formation of terrestrial planets like Earth several billion years ago resulted from the coalescence of hot blobs of molten rock and metal from dust and gas. Before they developed into separate planets, they went through four stages of development: differentiation, cratering, flooding, and surface evolution.
What is the name of the solar system's nucleus?The solar nebula
4.6 billion years ago, the solar nebula, a cloud of gas and dust, gave rise to the Sun and the planets.
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An action/reaction pair of forces ....
Select all that are True.
act on the same object.
point in the opposite direction.
act on two different objects.
point in the same direction.
Action-reaction pairs are forces that operate on separate objects in opposing directions and at identical magnitudes. Never do they affect the same thing. We learn that forces are interactions from Newton's third law.
An action-reaction pair is what?When two bodies contact, they exert an equal and opposite force on one another in accordance with Newton's third rule of motion. Action-reaction forces are made up of these forces.
What do action and reaction forces look like in practice?Think about how a baseball bat and a ball interact, for instance. The bat forces the ball to the right while the baseball forces the bat to the left. The action-reaction force pair is made up of these two forces acting on two separate objects together.
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The rate of decomposition of N2O3 (g) to NO2 (g) and NO (g) is followed by measuring NO2 at different times. The following data are obtained. [NO2 (mol/L) 0 0.193 0.316 0.427 0.784]
t (s) 0 884 1610 2460 50,000]
The reaction follows a first-order rate law.
Calculate the specific rate constant. Assume that after 50,000 s all the N2O3( g) had decomposed.
The reaction rate for this first order reaction is given as: r = - d[N₂O₃]/dt = k∙[N₂O₃] and ( [NO₂]e∙[NO]e ) / [N₂O₃]e = kf/ke = constant.
What is rate of decomposition?The average rate is given by change in concentration, ∆[A], divided by change in time, ∆t. Because A is reactant, minus sign is used in the calculation to make the rate a positive quantity.
As , ln[N₂O₃] = -k∙t + ln[N₂O₃]₀
ln( [N₂O₃]₀ / [N₂O₃] ) = k∙t
and N₂O₃ → NO₂ + NO
-∆[N₂O₃] = ∆[NO₂]
Now, - ( [N₂O₃]₀ - [N₂O₃] ) = [NO₂] - [NO₂]₀
As, [NO₂]₀=0
So,- [N₂O₃]₀ + [N₂O₃] ) = [NO₂]
[N₂O₃] = [N₂O₃]₀ - [NO₂]
Given, t=50000s [N₂O₃] = 0
So,0 = [N₂O₃]₀ - 0.784M
Hence, [N₂O₃]₀ = 0.784M
As, y = ln( [N₂O₃]₀ / [N₂O₃] )
= ln( 0.784M/(0.784M - [NO₃] )
we know, y = k∙t
so, k = ∑ y∙t / ∑ t²
Hence, k = 3.20×10⁻⁴ s⁻¹
r = k_f∙[N₂O₃] - k_r∙ [NO₂]∙[NO]
As, ( [NO₂]e∙[NO]e ) / [N₂O₃]e = constant
k_f∙[N₂O₃]e - k_r∙ [NO₂]e∙[NO]e = 0
So, ( [NO₂]e∙[NO]e ) / [N₂O₃]e = kf/ke = constant.
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the ________ is the point in the subsurface where 100% of the pore spaces are filled with water.
The Zone of saturation is the point where 100% of the pore spaces are filled with water. The correct option is B. Zone of Saturation
What is Zone of Saturation?
The ground directly below the water table is considered to be in the zone of saturation. Water has seeped through the cracks and pores in the rock and dirt.
Compared to the unsaturated zone above the water table, the zone of saturation is less corrosive. The region's moisture level is at one extreme, and the dry soil is at the other. At the midpoint between the two extremes of soil moisture content, corrosion is most severe.
The phreatic zone is another name for the zone of saturation.
Hence, it is the point just below ground level of water also known as Saturation Zone and in that region 100% of the pore spaces are filled with water.
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The complete Question is:
The ________ is the point in the subsurface where 100% of the pore spaces are filled with water.
A)Vadose Zone
B)Zone of Saturation
C)Zone of Accumulation
D)Capillary Fringe
The water of the Dead Sea is extremely salty, which gives it a very high density of 1240 \mathrm { kg } / \mathrm { m } ^ { 3 }1240kg/m 3 . Explain why a person floats much higher in the Dead Sea than in ordinary water.
The sea is particularly salty because the water evaporates but the salts do not. The denser the saltier.
The Dead Sea's water has a very high density of 1240 kg/m3 due to its extreme salinity. The Dead Sea is contaminated by the minerals and salts in the surrounding area. The sea is particularly salty because the water evaporates but the salts do not. The denser the saltier. The buoyancy is unlike anything you've ever felt because the salinity is eight to nine times higher than in ordinary sea water. Water therefore becomes denser as more salt is dissolved in it. Swimming in the Dead Sea is equivalent to floating because of its density of 1.24 kg/liter.
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a car is traveling at 20 m/s when the driver sees a ball roll into the street. from the time the driver applies the brakes, it takes 2 s for the car to come to a stop. What is the acceleration of the car during that period?
The acceleration of the car during that period is 10 m/s.
What is acceleration?The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily.
An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.
The velocity of the car traveling is 20 m/s
The time taken to stop the car is 2 seconds.
a = Δ v / Δt
a = 20 / 2 = 10 m/s
Therefore, the acceleration of the car during that period is 10 m/s.
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the magnetic field in the figure is decreasing at the rate 0.7 t/s . (figure 1)
The magnitude of the acceleration of a proton at rest at point a is [tex]3.35\times10^{5} m/s[/tex]
The concepts of Faraday's law, Ampere's law, Lenz's law, and the right-hand thumb rule are needed to solve this problem. First, determine the relationship between the electric field and the rate of change of the magnetic field using Faraday's law and Ampere's law. Discover the expression of a proton's acceleration at various sites by using the relationship between force and the dielectric field.
[tex]\frac{dB}{dT} =0.7T/sec[/tex]
F=ma=qE
a= [tex]\frac{qE}{m}[/tex]
a = [tex](\frac{qr}{2m})\times(\frac{dD}{dt} )[/tex]
a=[tex]\frac{1.6\times10^{-19}\times0.01\times0.7 }{2\times1.67\times10^{-27} }[/tex]m/[tex]sec^{2}[/tex]
a=[tex]3.35\times10^{5}[/tex]m/[tex]sec^{2}[/tex]
Direction:Up
a = 0 as r = 0
direction: No acceleration.
a=[tex]3.35\times10^{5}[/tex]m/[tex]sec^{2}[/tex]
Direction: Down
a=[tex]\frac{1.6\times10^{-19}\times0.02\times0.7 }{2\times1.67\times10^{-27} }[/tex]m/[tex]sec^{2}[/tex]
a=[tex]-6.7\times 10^{5}[/tex]m/[tex]sec^{2}[/tex]
Direction:Down.
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A car travels 100m in 2s northbound. What is it’s velocity
Answer:
50m/s
Explanation:
velocity= displacement/time
v=100m/2
v=50m/s
A tennis ball and a solid steel ball of the same diameter are dropped at the same time. Which ball has the greater acceleration
A tennis ball and a solid steel ball of the same diameter are dropped at the same time. The solid steel ball has the greater acceleration.
If two things of the same size and different materials are present, the heavy (higher density) object will fall first. This is because the drag and buoyancy forces on both objects will be the same, but the gravitational pull on the heavier object will be stronger.
Gravity causes things to descend to the ground more quickly. Velocity, which is a measure of the speed and direction of motion, is modified by acceleration. An object falls faster toward the ground as it falls in free fall for a longer period of time. Therefore, a solid steel ball has a high mass and is under more force.
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a voltaic cell is based on ag+(aq)/ag(s) and fe3+(aq)/fe2+(aq) half-cells. A.) Which reaction occurs at the cathode, and which at the anode of the cell?Express your answer as a chemical equation. Identify all of the phases in your answer. B.) Express your answer as a chemical equation. Identify all of the phases in your answer.
A) The reaction that occurs at the cathode of the cell is the reduction of Ag+ ions to Ag metal:
Ag+(aq) + e- → Ag(s)
The reaction that occurs at the anode of the cell is the oxidation of Fe2+ ions to Fe3+ ions:
Fe2+(aq) → Fe3+(aq) + e-
B) The overall reaction for the voltaic cell can be obtained by combining the half-cell reactions:
Ag+(aq) + Fe2+(aq) → Ag(s) + Fe3+(aq)
Note that this overall reaction is the sum of the two half-cell reactions. The overall cell reaction is not a redox reaction but it's a combination of two different oxidation-reduction reactions.
In this case, Ag+(aq) is the oxidizing agent and Fe2+(aq) is the reducing agent on the cathode side, and Fe3+(aq) is the oxidizing agent on the anode side.
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Why are there volcanoes along the west coast of the United States?
Answer: (Look in explanation)
Explanation:
There are volcanoes along the west coast of the United States because East and other places because they don't have global tectonic features (tectonic plate boundaries and hot spots in the mantle layer). Those cause volcano's activity to start.
Two plane mirrors meet at a 135º angle (see Figure 1). If light rays strike one mirror at an angle of 38 º, as shown, at what angle ϕ do they leave the second mirror?
The light rays leave the second mirror at an angle of 173º.
The angle of incidence of light rays striking the first mirror is 38º. When light strikes a mirror, the angle of incidence is equal to the angle of reflection.
So, the angle of reflection of the light rays striking the first mirror is also 38º.
The two mirrors form a 135º angle, and the angle of reflection of the light rays is 38º. So, if we add those two angles together, we get:
38º + 135º = 173º
The light rays leave the second mirror at an angle of 173º. Therefore, the angle ϕ is equal to 173º.
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The length of lightning channels is typically 5 to 10 km and can reach Group of answer choices a. 15 km b. 100 km c. 1000 km d. 2000 km
The length of lightning channels is typically 5 to 10 km and it can reach B: 100 km.
Lightning is referred to as a visible electrical discharge from clouds. This occurs when there is a charge imbalance between one area of the cloud and another surface (usually a building, the ground, another area of the same cloud, or another cloud) that is strong enough to break through air resistance.
Lightning is a large spontaneous spark discharge that occurs in the atmosphere or between the atmosphere and the surface of the earth. During the discharge, highly conductive plasma channels are created in the air, and when current flows through these channels, the air is rapidly heated to approximately 25,000 °C. The lightning channel is referred to as an example of terrestrial plasma in action. The typical length of lightning channels is 5 to 10 km and can reach up to 100 km.
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