The solid earth of the correct statements from the following list:
Plate tectonics is driven by heat from Earth's interior.Much of Earth's geologic past is erased by erosion.Earth's magnetic field is produced by its metal core.Comparative planetary science or comparative planetology is the branch of space and planetary science that studies various natural processes and systems of influences and phenomena on and between multiple celestial bodies.
The four inner planets have short orbits slow rotation no rings and are made of stone and metal. The outer four planets have longer orbits and rotations, gas and liquid compositions, and numerous moons and rings. The outer planets are called gas giants because they are made of hydrogen and helium.
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A bow wave is produced when a speed boat moves as fast as the waves it produces. faster than the waves it produces. O nearly as fast as the waves it produces. none of the above
A bow wave is produced when a speed boat moves nearly as fast as the waves it produces.
A bow wave is produced when a speed boat moves. The faster the boat moves, the bigger the bow wave. The bow wave is created by the boat pushing water out of the way.As the water is pushed out of the way, it creates a wave that travels in front of the boat.The wave eventually reaches the shore and can create a dangerous situation for swimmers and people in the water.This displaced water then has to go somewhere, so it creates a wave. The faster the boat moves, the more water it displaces and the larger the wave becomes. Bow waves can be a nuisance for other boats trying to move through the water.They can also be dangerous if they’re large enough.To know more about waves visit:
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17) Heat energy travels from an object with a high
A) internal energy to an object with a lower internal energy.
B) temperature to an object with a lower temperature.
C) Both of these, for they say essentially say the same thing.
D) None of the above choices are true.
Answer:
B) temperature to an object with a lower temperature.
Explanation:
a student has a small metal sphere that hangs from an insulating string. the student, in seeking to determine the charge on the sphere, brings a positively charged rod near the sphere and finds that the sphere is attracted to the rod. the student then brings a negatively charged rod near the sphere, and finds that the sphere is again attracted to the rod. which of the following conclusions, if any, can be drawn from these results?
The sphere is again attracted to the rod. The sphere must be empty from an insulating string.
What is the efficiency of an insulator string?As a result, the string efficiency of a suspension type insulator is defined as "the ratio of voltage across the whole string to the product of voltage across the disc nearest to the conductor and the number of discs in the string." Transmission lines on steel towers are supported by suspension insulators, which isolate the lines from the tower. They are critical to the reliable delivery of power. Suspension insulators are employed in two or more configurations depending on the transmission voltage and usage area. The string is free to swing in any direction, giving the transmission line a lot of flexibility.
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g a glob of slime is launched or dropped from the edge of a cliff. which of the graphs in fig. 7-22 could possibly show how the kinetic energy of the glob changes during its flight?
The glob would have kinetic energy as it is falling modelled by graph f.
What is kinetic energy?We know that the kinetic energy has to do with the energy that is possessed by a body by virtue of the fact that the body is in motion. We know that kinetic energy is one of the forms of mechanical energy. The term mechanical energy has to do with energy that is at rest or in motion. The energy that is at rest is called the potential energy.
We have been told in the question that a glob of slime is launched or dropped from the edge of a cliff. We have to note that the kinetic energy of the object is going to increase as it is falling to the ground. It then follows that the glob would have its maximum kinetic energy when the glob must have fallen to the ground.
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two cars collide inelastically and stick together after the collision. before the collision, the magnitudes of their momenta are
P1+P2, P1-P2 and P2-P1 is the magnitude of their combined momentum.
Before the crash
p₀ = P1 + P2
After crash
pf = (m1 + m2) v
p₀ = pf
P1 + P2 = (m1 + m2) v = Pf
-Car 1 travels to the right
Car 2 =right
Pf = P1 + P2
Car2 = left
Pf = P1-P2
-Car 1 = left
Car 2= right
Pf = -P1 + P2
Car 2 = the left
Pf = -P1 -P2
Momentum is the result of a particle's mass and velocity. A vector quantity with both magnitude and direction is momentum. Isaac Newton's second equation of motion states that the force applied to a particle is equivalent to the time rate of change of momentum.
Any grouping of particles has a momentum equal to the vector sum of their momenta. A modification in one particle's momentum is perfectly balanced by a modification in the momentum of another particle, according to Newton's third law, which states that particles exert equal and opposite forces on one another.
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A system comprising blocks, a light frictionless pulley, a frictionless incline, and connecting ropes is shown in the figure. The 9.0-kg block accelerates downward when the system is released from rest. The tension in the rope connecting the 6.0-kg block and the 4.0-kg block is closest to..?
The tension in the rope connecting the 6.0-kg block and the 4.0-kg block is closest to 42N.
What will the tension be?From the information, we have obtained three equations for the three unknowns a, T1 and T2:
6a = T1 - 3g
4a = T2 - T1 - 2g
9a = 9g - T2
The third equations gives
T2 = 9g - 9a
Substituting that in the second equation gives:
4 a = 9 g - 9 a - T1 - 2 g
13 a = 7 g - T1
In this case, we have reduced the problem to two equations in two unknowns:
6a = T1 - 3g
13 a = 7 g - T1
Solving further will be:
78 a = 13 T1 - 39 g
78 a = 42 g - 6 T1
Subtracting the second from the first eliminates a:
0 = 19 T1 - 81 g
T1 = 81/19 * g
= 81/19 × 9.8
T1 = 42 N
The tension is 42N.
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Use the formula from the video to help you answer this question. Assume you are driving 20 mph on a straight road. Also, assume that at a speed of 20 miles per hour, it takes 100 feet to stop. If you were to increase your speed to 60 miles per hour, your stopping distance is now _____. Group of answer choices.
Answer: 900 feet
Explanation:Given Velocity (V₁)=20mph≈29.334 t/s
it take 100 feet to stop
Using Equation of motion
v²-u²=2as
where
v,u=Final and initial velocity
a=acceleration
s=distance moved
0-(29.334)²=2(-a) (100)
a=29.331²/2×100=1.302 t/s²
When velocity is 60 mph
v²-u²=2as
0-(88.002)²=2-(-4.302) (s)
s=900.08 feet
How do you calculate a distance's speed?Given a distance and the amount of time needed to travel that distance, an object's speed can be calculated using the speed formula. By substituting the known values in the formula for speed and further analyzing, we can also use the speed formula to compute the distance or time.
What are some intriguing issues that the speed formula can be used to solve?Let's use the speed formula to answer a few intriguing issues. Figure 1: In an hour, a train might go 120 kilometres. Using the speed formula, calculate the train's speed in m/s.
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A force of 5. 0 n moves a 6. 0 kg object along a rough floor at a constant speed of 2. 5 m/s.
Answer:
BLACKPINK IN YOUR AREA I AM SO GOOD AT MATH
Explanation:
SO GOOD AT MATH BLACKPINK IN YOUR AREA
Based on what you learned about solar activity, select all of the correct statements from the following list.
The Sun does not rotate.
Solar activity can produce auroras and communication blackouts on Earth.
The solar constant never changes.
Sunspots are cooler areas of the photosphere.
Numbers of sunspots vary in approximately an 11-year cycle.
Solar activity can produce auroras and communication blackouts on Earth the correct statements from the following list.
What exactly is solar activity?A fraction of a second to billions of years are covered by the variations in the sun's magnetic field. Solar activity includes coronal mass ejections, high-speed solar winds, solar energetic particles, and solar flares.
Solar flares, coronal mass ejections, high-speed solar wind, and solar energetic particles are the four primary categories that may be used to categorise solar activity that is related to space weather. Only when a solar flare occurs on the sun's surface facing Earth do they have an effect on our planet.
The occurrence of events like solar flares and coronal mass ejections increases when the sun is active.
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A device consisting of four heavy balls connected by low-mass rods is free to rotate about an axle. It is initially not spinning. A small bullet traveling very fast buries itself in one of the balls. In the diagram, m = 0.005 kg, v = 450 m/s, M1 = 1.2 kg, M2 = 0.5 kg, R1 = 0.8 m, and R2 = 0.3 m. The axle of the device is at the origin < 0, 0, 0 >, and the bullet strikes at location <0.274, 0.752, 0> m. Just after the impact, what is the angular speed of the device? Note that this is an inelastic collision; the systems temperature increases. angular speed (absolute value of the angular velocity) = _________ radians/s
The angular speed of the device is 1.03 rad/s.
What is the conservation of angular momentum?A spinning system's ability to conserve angular momentum ensures that its spin will not change until it is subjected to an external torque; to put it another way, the rotation's speed will not change as long as the net torque is zero.
Using the conservation of angular momentum
[tex]L_{i} = L{f}[/tex]
Here, [tex]L_{i}[/tex] = the system's angular momentum before the collision
[tex]L_{i}[/tex] = 0 + mv[tex]d_{y}[/tex]
= (0.005)(450)(0.752)
= 1.692 kgm²/s
The moment of inertia of the system is given by
I = 2(M₁R₁² + M₂R₂²)+ mR₁²
= 2[(1.2)(0.8)² +(0.5)(0.3)²]+0.005(0.8)²
= 1.6292 kgm²
Here, [tex]L_{f}[/tex] = Iω
So,
1.692 = 1.6292(ω)
ω = 1.03 rad/s
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The angular speed of the device is 1.03 rad/s.
What is the conservation of angular momentum?A spinning system's ability to conserve angular momentum ensures that its spin will not change until it is subjected to an external torque; to put it another way, the rotation's speed will not change as long as the net torque is zero.
Using the conservation of angular momentum
[tex]L_{i}=L_{f}[/tex]
Here, = the system's angular momentum before the collision
[tex]L_{i}[/tex] = 0 + mv
= (0.005)(450)(0.752)
= 1.692 kgm²/s
The moment of inertia of the system is given by
I = 2(M₁R₁² + M₂R₂²)+ mR₁²
= 2[(1.2)(0.8)² +(0.5)(0.3)²]+0.005(0.8)²
= 1.6292 kgm²
Here, = Iω
So,
1.692 = 1.6292(ω)
ω = 1.03 rad/s
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A ball is projected horizontally with some initial velocity off a cliff 249 meters high It
makes contact with the ground in 5.8 seconds. [Neglect air resistancee.] What is the ball's
initial horizontal velocity? [Show all work, including the equation and substitution with
units.] [2 pts]
The initial velocity of the ball projected from the cliff is 5.8y m/s.
What is the initial horizontal velocity of the ball?The ball projected from the cliff undergoes projectile motion.
The initial horizontal velocity of the ball is calculated as follows:
Velocity = horizontal distance * time taken
The horizontal distance traveled by the ball is not given.
Let the horizontal distance traveled be y
The time taken for the ball to fall = 5.8 seconds
The velocity of the ball = y * 5.8
The velocity of the ball = 5.8y m/s
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a) a constant head permeability test was performed on a 35 cm2 (cross sectional area) soil sample. the length of the sample was 30 cm, and a 25 cm head difference was applied during testing. if 18 cm3 of water was collected over 80 sec, calculate the coefficient of permeability of the soil. (b) in a falling head permeability test,the head fell from 48 to 22 cm, in 6 minutes. the cross-sectional area of the soil sample is 60 cm2,and the length was 12 cm. if the area of the standpipe was 0.7 cm2, compute the coefficient of permeability of the soil.
The value of the coefficient of permeability is 1.6 × m/sec or 1.6 × cm/sec.
What is the value of coefficient of permeability ?Length = 6 cm
Area of cross-section = 50
Quantity of water = 500 ml
Time taken to flow = 15 mins = 15 × 60 secs = 900 secs
Constant Head = 40 cm
The value of the coefficient of permeability.
The formula to find the coefficient of permeability is given by,
⇒ q = k×i×A
q = Q/t and i = (H/L) on substituting for "q" and "i" in the above equation we get,
⇒ Q/t = k(H/L)A
rearranging the above equation in terms of "k" we get,
⇒k = (Q×L)/(A×t×H) → {equation 1}
Where "k" is the coefficient of permeability, "H" is the head constant, "A" is the area of cross-section, "L" is the length, "t" is the time taken to flow, and "Q" is the quantity of water.
On substituting the given values in equation 1 we get,
⇒ k = (500×6)/(50×900×40) {multiplying the terms}
⇒ k = 3000/18000 {dividing the terms}
⇒ k = 0.0016 = 1.6 × cm/sec or 1.6 × m/sec.
The value of the coefficient of permeability = 1.6 × m/sec or 1.6 × cm/sec
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An object has total energy Ewhen traveling at a speed of 0.70c) The same object has total energy (when traveling at 0.90c) What is the ratio Ea E? O.00 E=mc2=nMo C2 b) 0.8 c) 1.6 d) 2.7 e) 1.3 Ji-
E1:E2 ratio is 0.60 for an item with total energy E moving at a speed of 0.70c. Total energy of the same thing (when travelling at 0.90c).In order to meet the energy needs of a growing global population.
Total energy strives to deliver energy that is affordable, dependable, and cleaner. The speed of an object, also known as v in kinematics, is a scalar quantity that refers to the size of the change in that object's position over time or the size of the change in that object's position per unit of time is called as speed.
E = mc^2 = Moc^2/(1-(v^2/c^2))^1/2
for, 0.7c = 1/(1-(0.7^2))^1/2 = 1.4
for, 0.9c = 1/(1-(0.9^2))^1/2 = 2.294
E2/ E1 = 1.4/2.294 = 0.60
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A force of 30 newtons and a force of 20 newtons act
concurrently on an object. Which of the following
resultant forces could be produced using these two
forces?
Answer:
Explanation:
Given:
F₁ = 30 N
F₂ = 20 N
_________
R - ?
If the forces act along one straight line, then 4 combinations are possible:
distinguish between absorption and emission of energy
Electrons radiate when their regain their prior energies. Electrons gain energy & ascend into elevated amounts as they absorb energy.
What is the process of absorption?The process of absorption is how the blood takes in the byproducts of digestion so that it can supply the rest of the body. The mucus allows again for passage of a digested materials into to the lymphatic system or blood during absorption. The following mechanisms allow for absorption. basic diffusion
What are the 4 types of absorption?Characteristics of absorption and digestion in general. Gastrointestinal products are absorbed through four different mechanisms: exocytosis, passive diffusion, simple diffusion, or endocytic.
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For general projectile motion with no air resistance, the horizontal component of a projectile's velocity
A. remains a non-zero constant
B. continuously decreases
C. continuously increases
D. first decreases and then increases
E. remains zero
The horizontal component of a projectile's velocity remains non-zero constant for general projectile motion without air resistance. Projectile motion is the motion of an item as defined in physics.
Within the gravitational field. Projectile motion is exemplified by the upward vertical toss of a body. The air resistance that a body experiences during projectile travel is disregarded, leaving only the gravitational force to act on the body. A moving object's velocity is a function of time and measures how quickly its position changes in relation to a frame of reference. When an object is moving, its speed and direction are specified by its velocity. When an object moves, its location in relation to its environment changes.
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true or false -- in a simulated poll, the real population proportion always will fall within the error margin of the sample proportion no matter what size sample is pulled.
In a simulated poll, the real population proportion always will fall within the error margin of the sample proportion no matter what size sample is pulled is an incorrect statement.
A population proportion in statistics refers to the percentage of people who share a particular characteristic.For illustration, let's say a new law is supported by 43.8% of people in a particular city. A population proportion has the value 0.438.The formula for calculating a population proportion is as follows:. A population proportion is always between 0 and 1 (or 0 percent and 100 percent in percentage terms).Since it is usually too time-consuming and costly to collect data for every individual in a population, we often collect data for a sample instead.p = X / N.where:.
p: The population percentage.
X: The number of people who share a particular trait within a population.
N: The population's overall size in people.
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Jimmy ran 5 meters west from home and then turned north to jog 12 meters. Jimmy ran 17 meters, but could have arrived at the same point by jogging in a straight line. How many meters could he have jogged using a straight line distance?.
Zero meters could he have jogged using a straight line distance.
Straight-line distance is distance between two point. Here, Jimmy arrived same point, this means that Straight-line distance is zero there is no distance between two points.
A straight line has infinite length. We can never calculate the distance between the two extreme points of the line. A straight line has zero areas, zero volume. but it has infinite length.
Straight-line distance is the distance that you measure with a ruler on a paper map. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface.
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a scale from which a rock is suspended reads 5 n when the rock is out of water and 3 n when the rock is submerged. buoyant force on the rock is
A rock suspended by a weighing scale weighs 3 N when submerged in water and 5 N out of water. F= N1-N2. Substitute 5N for F1 and 3n for F2 above the expression to get F. F=5N-3N = 2N.
What is the rock's buoyant force?The weight of the water volume that the submerged object displaces is what creates the buoyant force. The buoyant force is the weight of water that has the same volume as the rock because the boulder is totally submerged. The buoyant force is still present even though the rock is sinking; it is merely smaller than the rock's weight.
What is seen on the weighing scale's reading when the lift accelerates its descent?Your perceived weight is equal to the normal force. Therefore, when the elevator accelerates upward or downward, you truly feel a little heavier than usual and a little lighter than usual.
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based only on the variable described for each of the following pairs of individuals, which individuals are most likely to show different facial expressions when experiencing the same emotion?
The two individuals from different cultures with different rules for displaying emotion are most likely to show different facial expressions while experiencing the same emotion.
How do cultures influence emotional expression?Displaying an emotion can be impacted by culture. The cultures in different countries express the appropriate emotions influenced by display rules. Expressing emotion can form facial expressions and be recognized as a culture. However, differences are found where cultures assign labels and convey emotion.On the other hand, emotion is not simply expressed through facial expressions. We also convey our emotional reactions through the tone of our voices, varied behavioral patterns, and body language. It is the physical expression of emotion through posture or movement.
For example, the Japanese usually avoid displaying intense communication emotions, whereas Americans do the opposite.
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a quantum dot is a small structure of atoms, usually about a nm in size. consider a quantum dot with a single ground state (with energy e0
Quantized energy levels and charge states. One wants to create dots as small as 5 nm using 3D metals.
Why do you use the term "quantum dot"?According to Farré et al. (2011), quantum dots (QDs) are semiconductor nanocrystals with a reactive core that regulates their optical characteristics. These cores are constructed of semiconductors, such as zinc selenide (ZnSe), indium phosphide (InP), cadmium selenide (CdSe), and cadmium telluride (CdTe) (ZnSe).
How may a quantum dot's size affect the light it emits?The band gap energy level and size of a quantum dot are inversely correlated, which changes the frequency and color of the light emitted. Smaller objects produce more intense, bluer light.
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Compared to the distance between earth and mars, the distance between jupiter and saturn is ______.
The distance between Jupiter and Saturn is much larger.
They are 403.3 million miles apart.
Distance is a numerical or every so often qualitative size of how some distance aside items or factors are. In physics or regular usage, the distance may check with a physical duration or an estimation primarily based on other criteria.
The space between two factors in physical space is the period of an immediate line among them, that's the shortest feasible course.
It reduces the entire international or part of the arena to a small sheet of paper. At the same time as making a map, cartographers pay attention to properly constitute the distance between two locations.
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An 82 kg painter stands on a long horizontal board 1. 55 m from one end. This 27 kg board is uniform, 5. 5 m long, and supported at each end by vertical posts. Waht is the magnitude of the total force provided bhy both posts. With what force does the post that is closest to the painter push upward on the board?
(a) The magnitude of the total force provided by both posts is 1,068.2 N.
(b) The force the post that is closest to the painter push upward on the board is 710.9 N.
What is the total force provided by both posts?
The magnitude of the total force provided by both posts is calculated as follows;
sum of the upward force = sum of downward force
total upward force provided by the post = weight of boar + weight of the painter
total upward force provided by the post = (27 x 9.8) + (82 x 9.8)
total upward force provided by the post = 1,068.2 N
The force the post that is closest to the painter push upward on the board is calculated as follows;
the total downward weight is distributed as follows;
= ¹/₂ (weight of board) + (5.5 - 1.55) / (5.5) x (weight of the painter)
= 0.5 (27 kg x 9.8 m/s²) + 0.72 (82 kg x 9.8 m/s²)
= 710.9 N
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Planets a and b are both the same size, but planet b has three times the mass of planet a. How does the weight of an object compare on the two planets?.
A comparison of an object's weight between the two worlds An object's weight is the same on both planets.
Why do objects of the same mass weigh differently on various planets?The weight of an object is determined by its mass and how strongly gravity pushes on it. How far apart two objects are from one another determines how strong gravity is. Because of this, the same thing weights differently on several planets.
What connection between the planets' weight and sizes do you notice?The gravity of planets, moons, and stars is the same. Depending on their size, they have different amounts of gravity. Therefore, gravity is different for larger and smaller planets. A human with more mass has greater gravitational pull, just like the planets.
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If the acceleration due to gravity on the Earth is 10m / (s ^ 2) and an gift has a mass of 50 kg, what is the force applied on the object by gravity?
Answer: BLACKPINK IN YOUR AREA SO GOOD AT MATH
Explanation:
PERIOD AHH MATH IS AAMAZING
Twin skaters approach one another as shown in Figure 10.39 and lock hands. (a) Calculate their final angular velocity, given each had an initial speed of 2.50 m/s relative to the ice. Each has a mass of 70.0 kg, and each has a center of mass located 0.800 m from their locked hands. You may approximate their moments of inertia to be that of point masses at this radius. (b) Compare the initial kinetic energy and final kinetic energy.
2.5 m/s is final angular velocity, given each had an initial speed of 2.50 m/s relative to the ice.
v1r1=v2r2
2.50×0.8=v2×0.8
v2= 2.5 m/s
The "angular velocity" of an object is the speed at which it rotates or revolves around an axis. This displacement is represented by the angle formed by a line on one body and a line on the other.
Technical terms like degrees, 360-degree rotations, and revolutions per minute are frequently used to describe angles or angular displacements (rpm). Angles and angular velocities are typically stated in radians and radians per second, respectively, in mathematics and physics. These converting factors link the following measurements: Radian per second is 1/30 of a radian, or 0.105, and a radian equals 1/180 of a degree, or 0.0175.
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A principal theory in social psychology is social exchange theory. According to this theory, we will be most likely to help othersA. who have already helped us.B. who are closely related to us.C. when the benefits outweigh the costs.D. for whom we feel empathy.
Answer:
Explanation:
C. When the benefits outweigh the costs.
Calculate the wavelength (in nm) of light associated with the transition from n=1 to n=3 in the hydrogen atom. [write numerical answer, no units].
As a result, 1.9351018 J is the energy, frequency, and wavelength of light associated with an electronic transition in a hydrogen atom from the n = 3 to n = 1 level. 1.935 × 10 − 18 J , 2.92×1015 Hz 2.92 10 15 Hertz and 1.026 10 7 meters.
What wavelength does a photon have when it changes from n 3 to n 1?λ=434 nm.
What is the energy of a photon released during a transition from 3 to n 1?The photon's energy for the transition from n = 3 to n = 1 is [h = 6 10-34 J - sec].
Is energy transferred from n 1 to n 2 or is it absorbed?Each photon that the atom emits or absorbs light in discrete packets.
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suture medical services is considering an investment of $200,000. data related to the investment and present value factors are as follows:
The NPV is equal to $150092approx.
What is present value factors?The future value factor's inverse is the present value factor. The (1 + i) future value factor is divided by 1 to determine the present value factor. By assuming a specific rate of return, the future value determines the nominal amount that a given amount will be "worth" at a specific point in the future.
Present value of inflows-cash inflow × Present value of discounting factor(rate %,time period)
Present value of inflows = (100,000(0.84746)+(92000×0.71818)+ Present value of inflows = (120000×0.60863)+(160,000×0.51579)+
(100,000×0.43711)
Present value of inflows = $350091.56
NPV = Present value of inflows-Present value of outlows
NPV = $350091.56-$200,000
which is equal to = $150092(Approx)(A).
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A 12 kg rock falls from a cliff and hits the ground in 4 seconds. Ignoring air resistance, what is the rock's speed just before it hits the ground?
Answer:
Explanation:
Given:
V₀ = 0 m/s
m = 12 kg
t = 4 s
g = 9.8 m/s²
________
V - ?
Speed:
V = V₀ + g·t
V = 0 + 9.8·4 = 39.2 m/s
