Visible light is known as the fragment which is the part of electromagnetic spectrum that can be seen by humans.
The wavelength and frequency of light that is visible are 400nm to 700nm and 400THz to 800THz respectively. As we know, living beings are blind to a number of wavelengths of light, but it can be detected by specific instruments. But we can perceive easily that our world is aligned around this light.
For example, the sun is natural visible light. Everything around us that we’re able to see is a reflection of sunlight falling off the objects. Colour of any object that we’re able to see is actually just a reflection of light and other than that, all other colours get absorbed.
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what is the temperature of a two-level system of energy separation equivalent to 300 cm−1 when the population of the upper state is one-half that of the lower state?
The temperature of a two-level system of energy separation equivalent to 300 cm−1 then the population of the upper state is one-half that of the lower state is 623.6K.
Two-level systems, or systems that effectively have just two energy levels, are an important class of systems because at sufficiently low temperatures, just the two lowest energy levels will be active. Solids are particularly significant because they contain two different energy levels for each atom, depending on whether the electron is spinning up or down. We take into account a collection of N distinct "atoms" with two distinct energy levels. Despite the fact that the atoms in a solid are identical, we can nevertheless identify them because they are situated in certain areas of the crystal lattice. These two's dynamism the levels are 0 and 1. The partition function of an atom is simple to express in writing.
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can someone please help me with this
The number of products formed in the reaction is one (1).
What is the product of a chemical reaction?
The product of a chemical reaction is the end result of a chemical reaction formed as a result of chemical activity.
The number of products formed during reaction of oxygen and iron metal is given as follows;
metal + oxygen → metal oxide.
4Fe + 3O₂ → 2Fe₂O₃
where;
4Fe is reactant3O₂ is reactantFe₂O₃ is productThis reaction (oxygen and iron metal) is popularly known as rusting, resulting in the formation of iron oxide.
Thus, we can conclude that rusting of iron metal forms one product.
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Is there static friction on anything that is not moving?
Or, is there static friction present ONLY when there is something trying to get something else to move, but it not moving?
The friction force is static since there is no relative motion between the shoe and the ground. The friction force, if any, is the static force of friction if there is no relative motion between the objects in contact (FS). An illustration would be a box that sits motionless on a ramp.
What is static friction?A force that holds an object at rest is called static friction. The following is a definition of static friction:
the resistance people feel when they try to move something that is stationary on a surface without actually moving their bodies or the surface they are trying to move it on.
It can be explained as the frictional force that perfectly balances the applied force throughout the body's stationary state.
The static frictional force is self-regulating, meaning that it will always be equal to and the opposite of the applied force.
Friction is the force that prevents an object from moving in the direction it is sliding along a surface, therefore it acts in the opposite direction. But a friction force can be felt even when an object is not moving.
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If 10 KJ of thermal energy is added to the system and 10 KJ of work is done by the system, what happens to the internal energy?
Given :
Thermal energy = 10 KJ Work done = 10 KJSolution :
We need to calculate the internal energy of the system i.e., ΔU.
Thermal energy (ΔQ) = 10 KJWe know that,
ΔU = ΔQ - ΔW>> ΔU = (10 - 10) KJ
>> ΔU = 0
Therefore,
Change in internal energy of system is zero.A stone is thrown off a cliff with a horizontal speed of 15 m/s.
If the stone’s final vertical speed is 40 m/s, how tall was the cliff?
How long is the stone in the air for?
How far from the base of the cliff does the stone hit the ground?
What is the stone’s horizontal speed right before it hits the ground?
The height of the cliff is 81.63 m.
The time spent by the stone in air is 4.08 seconds.
The horizontal distance travelled by the stone is 61.2 m.
The stone’s horizontal speed right before it hits the ground is 15 m/s.
What is the height of the cliff?
The height of the cliff is calculated as follows;
v² = u² + 2gh
where;
v is the final vertical velocity of the stone = 40 m/su is the initial vertical velocity of the stone = 0h is the vertical height of the stoneg is acceleration due to gravityv² = 0 + 2gh
h = v²/2g
h = (40²) / (2 x 9.8)
h = 81.63 m
The time of motion of the stone is calculated as follows;
h = ut + ¹/₂gt²
where;
u is initial vertical velocity = 0t is time of motion of the stoneh = 0 + ¹/₂gt²
t = √(2h/g)
t = √(2 x 81.63 / 9.8)
t = 4.08 seconds
The horizontal distance travelled by the stone is calculated as follows;
X = Vₓt
where;
Vₓ is initial horizontal velocityX = (15) x (4.08)
X = 61.2 m
During the horizontal motion of a projectile, the horizontal speed is constant. That is the final horizontal speed is equal to initial horizontal speed.
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the star arcturus is a red giant that is easily visible in the night sky. based on models of stellar evolution, what is happening to arcturus as this stage of its life?
Answer: it’s increasing in size and hydrogen fusion reactions are occurring in a shell around the core
The size of Arcturus is expanding, and its core is undergoing hydrogen fusion processes.
What is meant by red giant ?After a star exhausts its hydrogen fuel for nuclear fusion and starts to die, a red giant develops.
Here,
The brightest star in the constellation Boötes (the herdsman), Arcturus is a red giant star in the Northern Hemisphere of the Earth's sky. One of the brightest stars that can be seen from Earth is Arcturus.
At the conclusion of its existence, Arcturus will become a white dwarf, according to astronomers.
However, Arcturus is cooler than the sun, therefore a large portion of the red giant star's energy is released as heat. Arcturus really emits 215 times more heat than the sun does when this is taken into consideration.
The star is nearing the end of its existence. Arcturus, a red giant that has stopped fusing hydrogen in its core like the sun does, is now thought to be fusing heavier elements like carbon, according to astronomers.
Hence,
The size of Arcturus is expanding, and its core is undergoing hydrogen fusion processes.
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Calculate the energy possessed by a bullet of mass 10 Kg moving at a velocity of 25m/s.
125 J the kinetic energy possessed by a bullet of mass 10 Kg moving at a velocity of 25m/s.
What are some examples of kinetic energy?Kinetic energy, which may be seen in the motion of an object, particle, or group of particles, is the electricity of motion. Any moving item uses kinetic energy, such as a person who walks, a baseball being thrown, a piece of food falling from a table, or a charged particle inside an electric field.
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 moving is referred to as work. Energy and work are convertible because of their tight relationship.
Briefing:The kinetic energy of a body is
K.E. = 1/2 mv²
K.E. = 1/2 ×10 ×25
K.E. = 125 J
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During Piaget's sensorimotor stage, children acquire a
1) theory of mind.
2) concept of conservation.
3) sense of object permanence.
4) capacity for abstract reasoning.
According to the research, the correct option is 3. During Piaget's sensorimotor stage, children acquire a sense of object permanence.
What is Piaget's sensorimotor stage?In Piaget's theory, it is the phase during which children know the world, mainly based on their sensory impressions and their motor activities.
In this sense, it extends from birth to about age two where they acquire object permanence, that is, children learn that objects are separate and distinct entities, having an existence of their own outside of their individual perception.
Therefore, we can conclude that the sensorimotor period is a phase of cognitive growth in children that forms object permanence, thus the correct option is 3.
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When a car reaches a stop at the top of a hill, kinetic energy is transforms into what energy?
Answer:
to potentialenergy
explanation :a potential energy is stored energy or it oesn't get in moving body
What is leadership? Why is leadership important in the health sciences? First to answer brainliest
the action of leading a group of people or an organizaton, leadership is important during sciences because, if someone doesn’t know what to do you can lead them in the right way
Explanation:
Answer:
Within healthcare, skilled leaders motivate staff to work at their highest potential to benefit patients, their colleagues, and the organization as a whole.
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3) A stone is dropped into a well that is 57.0m deep. The stone accelerates due to gravity, at 9.81 m/s^2. Determine the time it takes for the stone to hit the bottom.
The time of motion of the stone when it hits the bottom is 3.41 seconds.
What is time of motion?The time of motion is the time taken for an object travel form its initial position to final position.
The time taken for the stone dropped from the given height to hit the bottom of the well is calculated as follows;
h = vt + ¹/₂gt²
where;
v is the initial velocity of the stone = 0t is the time of motion of the stoneh is height of fallh = ¹/₂gt²
2h = gt²
t² = 2h/g
t = √(2h/g)
t = √(2 x 57 / 9.81)
t = 3.41 seconds
Thus, we can conclude that when the stone is dropped, it takes more than 3 seconds to hit the bottom of the well.
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Who did experiments with light , known as the double-slit experiments, to produce interference patterns that could only be explained by evoking a wave-like nature for light?.
Thomas Young did experiments with light, known as the double-slit experiments, to produce interference patterns that could only be explained by evoking a wave-like nature for light.
Before the nineteenth century, the wave-like properties of light were not known. They got to know that light behaved like a wave thanks to Thomas Young's double slit experiment which he performed in the early 1800s.
Thomas Young made use of a light source (probably sunlight), barriers with one or two slits, and a screen for observation. First, he allowed light to pass through a slit in the barrier. Due to diffraction, the light that passed through the slit spread out into wave fronts, with the slit becoming the new light source. Another barrier with two slits was then put after the first one, just at the right distance, As expected the light from the first barrier passed through the two slits on the second barrier. The observation screen was placed after the second barrier.
There were two possible results from this experiment. One was that the sum of the intensity of light from each slit will give the intensity of both slits. In this case, light would be a particle. The second possible result was that dark and light bands will be created on the observation screen due to the interference patterns made by the superposition of light. In this case, light would be a wave.
At the end of the experiment, interference patterns were observed on the screen, which showed that light travelled in waves. Hence, Thomas Young's double slit experiment showed the wave-like nature of light.
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Which planet's orbit was Kepler first studying when he began to develop his laws of orbital motion? A Earth B Mars C Saturn D Jupiter
The planet orbit Kepler was studying when he developed the law of orbital motion is Mars.
What is law of orbital motion?
Kepler’s law of orbital motion are three laws and can be stated as follows;
All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time. The squares of the sidereal periods of revolution of the planets are directly proportional to the cubes of their mean distances from the Sun.The first and second Kepler's law of orbital motion was proposed when Kepler discovered that the orbit of Mars was an ellipse.
Thus, the planet's orbit that Kepler was first studying when he began to develop his laws of orbital motion is Mars.
The correction that describes the planets orbit Kepler was studying is Mars.
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Research the neutral needs of a 30 year old me a long distance runner who weighs 140 pounds and has body fat percentage of 20%
Answer: Male 1:30-year-old male, long-distance runner who weighs 140 lbs. and has a body fatpercentage of 20 percent. He is 5’10” tall.
Male 2:30-year-old male, works a desk job all day. He is sedentary and the onlyexercise he gets is a short walk once a week. He weighs 190 lbs. and his body fatpercentage is 30 percent. He is also 5’10” tall.
Based on your research, use your best judgment to estimate the following nutritional
Explanation: hoped this helped?
Answer:
70
Explanation:
140divided by 30 is 70
julia jumps straight upward on mars, where the acceleration due to gravity is 3.7\,\dfrac{\text{m}}{\text{s}^2}3.7 s 2 m 3, point, 7, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction downward. after 3\,\text{s}3s3, start text, s, end text, julia is falling downward with a velocity of 3.1\,\dfrac{\text{m}}{\text{s}}3.1 s m 3, point, 1, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. assuming air resistance is negligible, what was the initial vertical velocity of julia's jump? answer using a coordinate system where upward is positive. \dfrac{\text m}{{\text s}} s m
The initial velocity of Julia's jump in the vertical direction is 8 m/s.
What was the initial vertical velocity of Julia's jump?The initial vertical velocity of Julia's jump is determined using the given parameters and the relevant equation of motion.
The given parameters in Julia's jump are as follows:
Taken upward direction as positive;
Acceleration due to gravity (upward direction against gravity) = -3.7 m/s²
Time, t = 3 s
Final velocity, v (downward direction) = -3.1 m/s
Initial velocity, u = ?
Using the equation: v = u + at
u = v - at
u = -3.1 - (-3.7 * 3)
u = 8 m/s
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two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. transferring 4.50×109 electrons from one disk to the other causes the electric field strength to be 4.00×105 n/c.
The diameter of the disk at the given electrons is 6.9 mm.
The total charge of the capacitor is calculated as:
Q = nq
Q = 4.50×10⁹×1.6×10⁻¹⁹
Q = 7.2×10⁻¹⁰ C
The potential difference between the disk is:
V = Ed
v = 4 ×10⁵×0.50×10⁻³
V = 200 V
The capacitance of the capacitor is :
C = Q/V
C = 7.2×10⁻¹⁰/200
C = 7.2×10⁻¹² F
The area of the disk is :
C = (∈₀A)/d
A = (Cd)/∈₀
A = (7.2×10⁻¹²×0.5×10⁻³)/8.85×10⁻¹²
A = 0.0000406 [tex]m^{2}[/tex]
The diameter of disk is :
A = (πd²)/4
d = [tex]\sqrt{4A}[/tex]/π
d = [tex]\sqrt{4X0.0000406}[/tex]/π
d = 0.0069 m
d = 6.9 mm
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A cliff diver pushes off horizontally from a cliff and lands in the ocean 2.00s later. How fast was he going when he entered the water?
0m/s
19.0m/s
19.6m/s
20.0m/s
The velocity of the diver upon entering the water is 19.6m/s.
What is the landing speed?We know that in this case, the motion of the diver as he or she pushes down into the water can be obtained from the equation of the motion of an object that is undergoing kinematics in a gravitational filed.
Given that the diver was stationary before diving this implies that the initial velocity is zero and that the final velocity is the velocity with which the diver lands inside the water.
Thus;
v = u + gt
u = 0 m/s
v = gt
v = 9.8 m/s^2 * 2 s
v = 19.6m/s
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Which element does NOT have similar chemical properties to neon (Ne)
A. F
B. Ar
C. Xe
D. He
The data below were collected by scientists testing the force of gravity between two objects.
Distance Mass 1 Mass 2 Force
(kg) (kg)
(m)
(N)
0.10
100
150
0.00010
0.10
150
150
0.00015
0.10
100
300
0.00020
0.10
200
200
0.00027
0.10
200
300 0.00040
4
What do the data in the table support?
OA. The force of gravity between two objects is determined by the object with less mass.
OB. The force of gravity depends on the masses of the objects interacting.
OC. The force of gravity between two objects is determined by the object with more mass.
The force of gravity only depends on the distance between the objects interacting.
OD.
The force of gravity depends on the messes of the object's interaction.
A data table is a document consisting of columns rows and cells that contain specific values. They store information that users can later retrieve and update as needed. Data table titles, column headings, and row headings help users more clearly understand the information in the table.
Data tables display information in a grid-like format of rows and columns. They organize information in ways that are easy to scan and allow users to search for patterns and extract insights from data. A data table can contain Interactive components. The table can be read from left to right or top to bottom. When reading the table across the lines, read the information from left to right.
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7. If a graph is showing a positive slope, and the graph itself is a straight line, what must be the x and y axis if the straight
line is showing a constant acceleration?
An object has positive acceleration if it is accelerating and travelling in the right direction.
What does it signify if a position time graph has a straight line with a positive slope? A straight line with a positive slope will appear on the Position vs. Time graph of an item travelling forward at a constant speed. It shows that the object's velocity is constant and that it is travelling ahead.The y-axis of this sort of graph denotes position in relation to the starting point, while the x-axis denotes time. An object's distance from its beginning position at any given moment since it began moving is displayed on a position-time graph.In a distance-time graph, the object's speed is equal to the slope or gradient of the line. The line becomes steeper as the thing goes more quickly (and the greater the gradient).The starting point of the item is indicated by the y-intercept. An object's y-intercept is zero if it begins at the measuring instrument. Its y-intercept is 3 meters if it begins at a distance of 3 meters. When two items are in the same position, you may tell by where two lines intersect.To Learn more About Positive acceleration, Refer:
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What is force?
A. A measure of how far an object moves
B. The amount of energy an object has
C. A push or a pull that transfers energy from one object to another
D. The rate at which an object's speed increases
Force is a push or a pull that transfers energy from one object to another object in the time period under consideration.
What is force and how it is a pull or push?Force is when we try to pull an object , we exert a drawing force on the body in expectation of body drew.Force is again when we push an object , and try to move it away from our body in order to keep that object in place.Force is a quantity discovered by Newton and for the very same reason the unit of force was considered to be Newton.There are numerous kind of forces like rotational force, centripetal force, electromagnetic force etc. with significant uses.Force have a great importance in day to day life in order to keep the thing moving we keep on forcing the object to displace.To know more about force visit:
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If the displacement of a person from their desk is 27 m, 17° S of W, how far west are
they from their desk?
If the displacement of a person from their desk is 25.92 m if 27 m, 17° S of W, they are west from desk.
Resolving the 27 m distance into its horizontal and vertical components. The horizontal component will describe how far west they are and the vertical component will describe how far south they are. After resolving the components make a right angled triangle.
cos θ = Adjacent side / Hypotenuse
θ = 17°
Adjacent side = Horizontal component
Hypotenuse = 27 m
cos 17° = West distance / 27
West distance = 0.96 * 27
West distance = 25.92 m
In a right angled triangle some of the ratios similar to the one used above can be used. These ratios are called as trigonometric ratios. These ratios use trigonometric functions and relate them to sides of a right angled triangle.
Therefore, they are 25.92 m west from the desk.
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what is true about current that flows through resistors in parallel? all current flows through the lowest value resistor(s). all current flows through the highest value resistor(s). the current is determined by v
A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance. Resistor use in electronic circuits includes lowering current flow, adjusting signal levels, dividing voltages, influencing active devices, and terminating transmission lines.
The voltage drop across a resistor increases with resistor size and consumes more energy as a result. Voltage drop can be confirmed using Ohm's Law. Voltage in a DC circuit is equal to current times resistance.
V = I R.
Resistors are said to as being in parallel when two nodes share terminal connections. The lowest parallel resistor is larger than the comparable overall resistance.
The supply current is equal to the total of the currents flowing through all of the resistors when they are linked in parallel. The supply current is equal to the sum of the currents in a parallel circuit's branches. The potential difference across parallel connections of resistors is the same.
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Does the equation below follow the Law of Conservation of Matter?
Answer:
4th one
i wont let me write less than 20 letters so ignore this line
difference between friction and collision
Friction frequently has no immediate relevance. Perpendicular interactions are collisions. One parallel force is friction.
Consider a billiard ball colliding with another ball on a pool table. Although the billiard ball may enter at an angle, the momentum transfer occurs perpendicular to the contact plane.
Does collision cause friction?The internal force (of the collision) is often larger than the exterior force (friction) on a system when there is a collision within that system.
Two objects meet in an elastic collision when no kinetic energy is wasted. The kinetic momentum and energy of the objects are preserved when they bounce back from one another. We are dealing with an impactor because inelastic collisions are thought to happen when the two items stay together after the impact.
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DeWayne meets a potential employer at a restaurant, who gives him a phone number. Because he doesn't have anything to write with, he repeats the number several times to himself as a way of remembering the phone number. He is not very likely to remember this phone number later in the evening because of this strategy. True False
Based on the fact that he didn't write the number down, the statement "He is not very likely to remember this phone number later in the evening because of this strategy. " is True
This is further explained below.
What is DeWayne's strategy?Generally, While DeWayne's strategy is eating at a restaurant, he meets a potential employer who provides him with his phone number.
Because he does not have anything with which to write, he must recite the telephone number to himself many times in order to commit it to memory.
In conclusion, It is quite improbable that he will remember this phone number later on in the evening if you use this strategy.
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Use the slope-intercept form to graph the equation y= -8/7x + 3
Answer:
8x + 7y = 21
Explanation:
-8/7x + 3 in slope intercept form is 8x + 7y
Graph in pic
Imagine that you are comparing three different ways of having a ball move down through the same height. In which case does the ball reach the bottom with the highest speed?.
We can observe that the ball reaches the bottom with the highest speed when the ball is dropped.
What occurs when a ball is dropped?As you drop the ball, gravity pulls it downward and accelerates it.It squashes as soon as it collides with the earth at impact.The crushed ball pushes against the floor, which pushes back as the ball assumes its original shape.The power of the floor pressing against the ball causes it to rebound back into the air.When you drop a ball, where does the energy go?If you drop the basketball, gravity will pull it down and, as it does so, transform its potential energy into kinetic energy.The potential energy of the ball decreases as it gets closer to the earth.However, the ball also accelerates upward, increasing its kinetic energy.To learn more about dropping a ball visit:
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Albert bandura conducted an important experiment with pre-school aged children. one reason this study is important in 2014 is: group of answer choices children imitated an adult lab assistants behavior children are quite capable of violence children can imitate adult behavior and behavior that is observed, so does media impact violent behavior? some children spend much time watching adults in our world. children should be protected from all violent scenes
Answer:
children spend much time watching adults in our world. children should be protected from all violent scenes
Explanation:
Are acts of violence and aggression taught behaviours? Albert Bandura and his colleagues established one method that kids pick up violence in the well-known and significant "Bobo doll experiment."
According to Bandura's social learning theory, learning happens through interactions with other people and observations of the world around us. In essence, people pick up new skills by observing others and then copying their behaviour.
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Yes, all violent scenes should be kept out of children. This experiment is also known as the Bobo Doll Experiment from the perspective of Albert Bandura. Which Discloses Aggression Among Children.
Numerous social evils, such as war and intergroup violence, are caused by aggression. It should come as no surprise that the topic is one of psychology's most researched areas. Most of the research on human aggression has been conducted by researchers in the discipline of social psychology, which is devoted to the study of interpersonal communication and group dynamics.
Albert Bandura's studies on children's behaviour after seeing an adult were collectively known as the "Bobo doll experiment" and were conducted between 1961 and 1963.
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Energy of an object in motion is _____.
1.thermal energy
2.temperature
3.kinetic energy
4.potential energy
Answer:
3.kinetic energy
Explanation: