Ignoring sign, which transition is associated with the greatest energy change?.
Answers
The transition associated with the greatest energy change while ignoring sign is the transition between the lowest energy level and the highest energy level.
Electrons in an atom can be excited from one energy level to another, and when they fall back down to a lower energy level, they emit energy in the form of light. The energy of an electron in an atom increases as it moves to higher energy levels, and the difference in energy between two energy levels determines the frequency of the emitted light, which can be observed as spectral lines on a spectrum.
The transition between the lowest energy level and the highest energy level has the greatest energy change while ignoring sign.
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Related Questions
an electric field of 1.51 kv/m and a perpendicular magnetic field of 0.369 t act on a moving electron to produce no net force. what is the electron's speed?
Answers
The electron's speed is 4.10 x 10^3 m/s.
We need to understand the basic principles of electric and magnetic fields. Electric fields are created by electric charges and exert a force on other charges within the field. Magnetic fields, on the other hand, are created by moving charges and exert a force on other moving charges within the field.
In this scenario, we have an electric field of 1.51 kv/m and a perpendicular magnetic field of 0.369 t acting on a moving electron. The fact that there is no net force on the electron indicates that the forces produced by the electric and magnetic fields are equal in magnitude but opposite in direction.
To find the electron's speed, we can use the following equation:
\(F = q(E + v x B)\)
where F is the force on the electron, q is the charge of the electron, E is the electric field, v is the velocity of the electron, and B is the magnetic field.
Since there is no net force on the electron, we can set F equal to zero:
0 = \(q(E + v x B)\)
Rearranging this equation, we get:
v = \(-E x B / B^2\)
Substituting in the values for E and B, we get:
v = -(1.51 x 10^3 V/m) x (0.369 T) / (0.369 T)^2
v = -1.51 x 10^3 / 0.369
v = -4.10 x 10^3 m/s
The negative sign in the velocity indicates that the electron is moving in the opposite direction of the magnetic field. However, we are only interested in the magnitude of the velocity, which is:
|v| = 4.10 x 10^3 m/s
Therefore, the electron's speed is 4.10 x 10^3 m/s.
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Another piece of copper has a volume of 7 cm3 what is its mass?
Answers
The mass of a piece of copper that has volume of 7\(cm^{3}\) is 62.58g.
A piece of copper has a volume of 7 \(cm^{3}\), find what is its mass?The element copper (Cu) is a reddish, very ductile metal belonging to Periodic Group 11 that has an exceptional ability to conduct heat and electricity. In nature, copper can be found in its free metallic state.
Given,
Volume = 7 cm^3
we know that,
The density of copper is 8.960g/cm^3 in room temperature.
Density = mass / volume
Mass = Density x Volume
Mass = 8.960 x 7
Mass = 62.72 g
Mass of copper has a volume of 7 cm^3 is 62.72g.
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For the following elementary reaction 2br• -> br2-. The rate of consumption of the reaction and the rate of formation of product is given by which set of expression?
Answers
Answer: \(-\frac{1}{2}\times \frac{d[Br^.]}{dt}=+\frac{d[Br_2]}{dt}\)
Explanation:
Rate of a reaction is defined as the rate of change of concentration per unit time.
Thus for reaction:
\(2Br^.\rightarrow Br_2\)
The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.
\(Rate=-\frac{d[Br^.]}{2dt}\)
or \(Rate=+\frac{d[Br_2]}{dt}\)
Thus \(-\frac{d[Br^.]}{2dt}=+\frac{d[Br_2]}{dt}\)
PLEASR HELP!! Warm air rises. The diagram shows that clouds form as the:
A) dew point increases. B) temperature of the air drops. C) air gets less dense and holds less water. D) air becomes less saturated with increased altitude.
Answers
Answer:
C.) Air gets less dense & holds less water
will be the answer. hope this is helpful ^_^
9. Jayden says that the dentist can shine a special light on his teeth that will make his teeth become whiter. Can light change Jayden’s teeth?
Answers
While it is true that a dentist can use a special light during a teeth whitening procedure, it is not the light that actually changes the color of the teeth.
The light is simply a catalyst that activates a chemical reaction in the whitening gel or solution that is applied to the teeth.
Most teeth whitening products use a peroxide-based gel or solution, which breaks down into water and oxygen ions when it comes into contact with the teeth.
These oxygen ions then penetrate the enamel and dentin of the teeth, breaking apart the chemical bonds that cause tooth stains and discoloration.
The process of whitening teeth can take several treatments, with the use of a special light during each treatment to help speed up the chemical reaction.
So, in short, it is not the light itself that changes the color of Jayden's teeth, but rather the chemical reaction that is activated by the light.
The potential difference is changed to 0.30V.
The current in the lamp is now 0.13 A.
The lamp is switched on for 35 s.
Calculate the energy that is transferred in this time.
Select an equation from the list of equations at the end of this paper.
Answers
The energy that is transferred in this time is E = 1.365 J.
Equation :To calculate Charge using formula,
Q = I x t
Q = 0.13A x 35 s
Q = 4.55 C
To calculate energy transferred,
E = Q x V
where,
Q is charge
V is potential difference
So by given values,
E = 4.55 x 0.30
E = 1.365 J
Energy :In order to perform work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is a quantitative property. Energy is a conserved resource; according to the law of conservation of energy, energy can only be transformed from one form to another and cannot be created or destroyed.
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If 120 g of naoh were used to prepare 500 ml of solution, what would the concentration be?.
Answers
If 120 g of NaOH were used to prepare 500 ml of solution, the concentration would be 6 M
Molarity = ( Weight of solute * 1000 ) / ( GMV * V )
GMV = Gram molecular weight
V = Volume of solution
GMV of NaOH = 26 + 16 + 1
GMV of NaOH = 40
Molarity = ( 120 * 1000 ) / ( 40 * 500 )
Molarity = 120 / 20
Molarity = 6
Molarity or molar concentration is the concentration of chemical species mainly solute in a solution. It is the amount of substance per unit volume of solution.
Therefore, the concentration of NaOH is 6 M
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Q C A 50.0 -kg woman wearing high-heeled shoes is invited into a home in which the kitchen has vinyl floor covering. The heel on each shoe is circular and has a radius of 0.500cm . (a) If the woman balances on one heel, what pressure does she exert on the floor?
Answers
The woman exerts a pressure of approximately XXX Pa on the floor.
To calculate the pressure exerted by the woman on the floor, we first determine the force she exerts, which is equal to her weight. Assuming the woman weighs 50.0 kg, we multiply this by the acceleration due to gravity (9.8 m/s²) to find the force of 490 N. The area over which this force is distributed is determined by the circular heel of each shoe. Given a radius of 0.500 cm (0.005 m), we calculate the area using the formula πr². Finally, dividing the force by the area gives us the pressure exerted by the woman on the floor in pascals (Pa).
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what is the frequency of a wave that travels 20 m/s with a wavelength of 200 meters?
Answers
The frequency of a wave is the number of cycles it completes in a given period of time, and it can be calculated using the following equation: frequency = velocity/wavelength. In the case of this wave, the frequency is 0.1 Hz (or 10 cycles/second).
frequency = 20 m/s/200 m = 0.1 Hz
The frequency of a wave that travels at 20 m/s with a wavelength of 200 meters is 0.1 Hz.What is frequency?Frequency is the number of occurrences of a periodic event per unit of time. It is commonly used to determine the number of occurrences of a specific event in a given period of time.
The frequency equation is:f = v/λwhere:f is the frequency of the v is the velocity of the wave (m/s)λ is the wavelength of the wave (m)Using the formula given above:f = v/λwherev = 20 m/sλ = 200 metersf = 20/200f = 0.1 HzTherefore, the frequency of the wave is 0.1 Hz.
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what are the 5 native elements?
Answers
Answer:
platinum, iridium, osmium, iron, zinc
30. A box with mass 20kg is on a cement floor. The coefficient of static friction between the box and floor is 0.25. A man is pushing the box with a horizontal force of 35N. What is the magnitude of the force of static friction between the box and floor
Answers
Answer:
84.05
Explanation:
F=mg×0.25F=20x9.81×0.25f=49.05NF=35NF=f+F
F=49.05+35
=84.05
a 180.00 kg roller-coaster car is pressed against a spring of constant 1,350 n/m and compresses it 2.50 meters. it is then released and rolls up an inclined portion of the track. how high up the incline will car roll before coming to a stop?
Answers
To determine how high up the incline the 180.00 kg roller-coaster car will roll before coming to a stop,
1. Calculate the potential energy stored in the compressed spring:
Potential energy (PE_ spring) = 0.5 × spring constant (k) × compression distance (x)^2
PE_ spring = 0.5 × 1,350 N/m × (2.50 m)^2
PE_ spring = 0.5 × 1,350 N/m × 6.25 m^2
PE_ spring = 4,218.75 J (joules)
2. Assume that all the potential energy in the spring is converted into gravitational potential energy when the car reaches its highest point on the incline:
PE_spring = PE_gravitational
3. Calculate the gravitational potential energy:
PE_gravitational = mass (m) × gravitational acceleration (g) × height (h)
Since we know PE_spring and m, and g is approximately 9.81 m/s^2, we can solve for h:
h = PE_spring / (m × g)
4. Plug in the values and solve for h:
h = 4,218.75 J / (180.00 kg × 9.81 m/s^2)
h ≈ 2.33 m
So, the roller-coaster car will roll approximately 2.33 meters high up the incline before coming to a stop.
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A 5.0-m-wide swimming pool is filled to the top. The bottom of the pool becomes completely shaded in the afternoon when the sun is 23Â degrees above the horizon. How deep is the pool? (in meters)
Answers
the depth of the pool is 3.08 meters.
Given:
Width of the swimming pool = 5.0 mThe pool is filled to the top.
The bottom of the pool becomes completely shaded in the afternoon when the sun is 23° above the horizon
We can solve the given question using Trigonometry.
ABC,cot 23° = AB/BCEquation (1)
But, AB + BC = 5.0 m
Equation (2)Also, AB^2 + BC^2 = AC^2
[Applying Pythagoras theorem in triangle ABC] Equation (3)
From equation (2), we have BC = 5 - AB
Substituting it in equation (3),
we get:
AB^2 + (5 - AB)^2 = AC^2
Expanding and simplifying the above equation:
2AB^2 - 10AB + 25 = AC^2But, we know that AB/BC
Equation (1) => AB = BC × cot 23° => AB = (5 - AB) × cot 23°
Solving the above equation, we get AB = 1.92 m
Hence, the depth of the pool is BC = 5 - AB = 5 - 1.92 = 3.08 meters.
So, the depth of the pool is 3.08 meters.
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Write your answer to the question below.
-How do you think energy is transformed in the Drop Tower( ride in a amusement park)?
Answers
Answer:
Hi... Potential energy is converted to kinetic energy and kinetic energy is converted to potential energy
a rabbit runs 40 ? to west, sees the farmer, turns back and runs 60 ? to east. what is the total displacement of the rabbit?
Answers
The displacement is just the difference in where the two markings are located, and it is unrelated to the direction taken. However, the distance travelled is the length of the entire path 8.79m.
What is a displacement example?Alteration in a material's position in relation to a frame is known as displacement. For instance, a billiards ball moves of one spot to another when a player hits it. It is alleged to have moved. A vector quantity with both magnitude and orientation is displacement.
How can displacement issues be resolved?S = x2 + y2 is the displacement formula that results. For displacement, use the letter "S." The object is moving in two directions at once: X in the first direction and Y in the second. Y = 0 if your item only moves in one direction.
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In which region is there most likely to be a volcano
A
B
C
D
Answers
So D is your answer
a 63.0-cm-diameter cyclotron uses a 450 v oscillating potential difference between the dees. part a what is the maximum kinetic energy of a proton if the magnetic field strength is 0.740 t ?
Answers
The maximum kinetic energy of a proton in a cyclotron can be found using the equation:
K = (q * V * r) / (2 * m)
q is the charge of the proton (1.602 x 10^-19 C)
V is the potential difference between the dees (450 V)
r is the radius of the cyclotron (31.5 cm or 0.315 m)
m is the mass of the proton (1.673 x 10^-27 kg)
f = v / (2 * pi * r)
v is the velocity of the proton
B = (m * v^2) / (q * r)
v = sqrt((q * r * B) / m)
f = sqrt((q * B) / (2 * pi * m))
K = (q * V^2 * B^2) / (4 * pi * f^2 * m)
K = (1.602 x 10^-19 C * (450 V)^2 * (0.740 T)^2) / (4 * pi^2 * sqrt((1.602 x 10^-19 C * 0.740 T) / (2 * pi * 1.673 x 10^-27 kg))^2)
K = 2.68 x 10^-13 J
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What type of reaction occurs when gasoline is burned in an engine?
A. Exothermic, because energy is absorbed from the surroundings
B. Endothermic, because energy is released into the surroundings
C. Endothermic, because energy is absorbed from the surroundings
D. Exothermic, because energy is released into the surroundings
Answers
Answer:
D
Explanation:
The correct answer is D. Exothermic, because energy is released into the surroundings. When gasoline combusts, the chemical bonds that were holding together the molecules of the fuel and oxygen are broken, releasing energy in the form of heat and light. This energy is then used to power the engine.
1. A person of mass 55 kg is in a bumper car that has a mass of 75 kg. They are together at a velocity of 8 m/s.
a. what's the total momentum of the system
b. what is the momentum of the bumper car after the collision? did it change directions? how do you know?
Answers
The momentum of the bumper car after the collision is 1,040 kgm/s.
Momentum of bumper
The change in momentum of the bumper is calculated as follows;
P = v(m1 + m2)
P = 8(55 + 75)
P = 1,040 kgm/s
The momentum of the bumper car after the collision is 1,040 kgm/s.
The direction is still the same.
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A 1,470.39 N rocket travels at constant speed for 1,522.64m in 2.11 seconds. What is the kinetic energy of the rocket?
Answers
Given data:
* The weight of the rocket is 1470.39 N.
* The distance traveled by the rocket is 1522.64 m.
* The time taken by the rocket is 2.11 seconds.
Solution:
The velocity of the rocket in terms of the distance and time is,
\(\begin{gathered} v=\frac{\text{distance}}{\text{time}} \\ v=\frac{1522.64}{2.11} \\ v=721.63\text{ m/s} \end{gathered}\)The mass of the rocket from the weight is,
\(\begin{gathered} mg=1470.39 \\ m=\frac{1470.39}{g} \end{gathered}\)where g is the acceleration due to gravity,
Substituting the known values,
\(\begin{gathered} m=\frac{1470.39}{9.8} \\ m=150.04\text{ kg} \end{gathered}\)The kinetic energy of the rocket in terms of mass and velocity of the rocket is,
\(\begin{gathered} K=\frac{1}{2}mv^2 \\ K=\frac{1}{2}\times150.04\times721.63^2 \\ K=39066654.26\text{ J} \\ K=39.07\times10^6\text{ J} \\ K=39.07\text{ MJ} \end{gathered}\)Thus, the kinetic energy of the rocket is 39.07 MJ.
[grade 11 physics kinematics word problem] can someone help? the answer is suppose to be the one in the brackets but i am getting 5.3x10^2
landing on an aircraft carrier. when landing on an aircraft carrier, a military jet must slow down and stop in a distance of 86 m. a tailhook on the plane attaches to an arresting wire on the carrier to slow the plane down at a rate of 32.61 m/s2. if the plane stops in 2.3 s, how fast was the plane travelling before slowing down? give your answer in km/h. (2.7 x 102 km/h)
Answers
The plane was traveling at a speed of 1552.68 km/h before slowing down and the answer is not 2.7 × 102 km/h for the distance.
Given, Distance (d) = 86 m Acceleration (a) = 32.61 m/s2Time (t) = 2.3 s Initial Velocity = ?
The amount of space between two objects or locations is referred to as distance, which is a fundamental notion in physics. It has magnitude but no clear direction because it is a scalar quantity. Depending on the situation, distance can be expressed in a variety of ways, including metres, kilometres, miles, or even light-years.
It is frequently used to indicate the distance between two items or the length of a path taken. In mathematics, distance is determined in two- or three-dimensional space using formulas like the Pythagorean theorem.
We know, Distance = Initial Velocity × Time + 1/2 × Acceleration ×\(Time^2d\) = ut + 1/2 × a × \(t^2u\) = (d - 1/2 × a × \(t^2\))/tu = (86 - 1/2 × 32.61 × \(2.3^2\)) / 2.3u = (86 - 1/2 × 32.61 × 5.29) / 2.3u = (86 - 85.008) / 2.3u = 0.992 / 2.3u = 0.4313 km/s
Convert km/s to km/h1 km/s = 3600 km/h
Therefore, 0.4313 km/s = 0.4313 × 3600 km/h = 1552.68 km/h
Therefore, the plane was traveling at a speed of 1552.68 km/h before slowing down and the answer is not 2.7 × 102 km/h.
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When we sit on a chair and study for 2-3 hours, we are not doing work from a physicists point of view. Why?
Answers
In the context of physics, work is defined to be the movement of an object when you apply a (pushing or pulling) force.
If you lifted a box to move it upward, then you are doing work. If you slide that box along the floor, then you are also doing work. However, if you try to lift something very heavy, but cannot move it at all, then 0 work is being applied. This is because the object hasn't moved. You need displacement to have work happen.
So that's why a physicist would not consider studying doing "work" (in the context of physics), though I'm sure they would be able to agree that studying does exercise the mind.
A bird in a tree vocalizes a sound that has a wavelength of 23 meters when the speed of sound is 338 m/s. What is the frequency of the sound the bird is making and can a normal human hear the bird?
Answers
Using the above values for the speed of sound and wavelength, the frequency of the sound produced by the bird in the tree is determined to be 14.7 Hz. A typical person is unlikely to be able to hear this sound.
How can you calculate a sound wave's frequency from its wavelength?As with all waves, the relationship between the frequency and wavelength of sound is and its wavelength.
Does sound have a formula?The following equation can be used to calculate sound intensity: P stands for pressure change or amplitude, D stands for material density, and VW stands for measured sound speed. The more your sound wave oscillates, the louder your sound will be.
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Which of these is a form of chemical weathering? exfoliation, wedging,hydrolysis and abrasion
Answers
hydrolysis.
Explanation:
Chemical weathering is what happens when rocks are broken down and chemically altered. Learn about the different types of chemical weathering, including hydrolysis, oxidation, carbonation, acid rain and acids produced by lichens.
What does Quantum mean?
Answers
What are the scientific principles of physical science
Answers
Answer:
Describing and measuring motion. Newton's laws of motion. Forces, weight, and mass. Momentum and conservation of momentum.
The theory of gravity.
Energy, work, and power. Motion, position, and energy.
Explanation:
Answer:
lOl can i have brainliest
Explanation:
Two loud speakers are 1.60 m apart. A person stands 3.00 m from one speaker and 3.50 m from other speaker.
What is the lowest frequency at which destructive interference will occur at this point if the speakers are in phase?
Answers
f = 343 Hz
Step by step explanation:
For destructive interference to occur, the sound waves from the two speakers must be out of phase by half a wavelength. This means that the path difference between the two waves must be an odd multiple of half the wavelength.
In this case, the path difference between the two waves is given by:
Δx = d₂ - d₁
where d₂ is the distance from the second speaker to the person, and d₁ is the distance from the first speaker to the person.
Substituting the given values, we get:
Δx = 3.5 m - 3.0 m
Δx = 0.5 m
For destructive interference to occur, the path difference must be an odd multiple of half the wavelength, i.e.:
Δx = (2n + 1)λ/2
where n is an integer.
Solving for the wavelength, we get:
λ = 2Δx/(2n + 1)
The lowest frequency occurs when n is the smallest possible value, i.e. n = 0. Substituting this value, we get:
λ = 2Δx/1
λ = 2(0.5 m)
λ = 1.00 m
The frequency of the sound wave is given by:
f = c/λ
where c is the speed of sound in air (approximately 343 m/s).
Substituting the values, we get:
f = 343 m/s/1.00 m
f = 343 Hz
Therefore, the lowest frequency at which destructive interference will occur at the given point is 343 Hz.
How was Mendeleev first periodic table like the periodic table today
Answers
Answer:
He began organizing the known elements according to their atomic weights and chemical properties.
Explanation:
At a bicycle repair shop, a bicycle tire of mass M and radius R is suspended from a peg on the wall. The moment of inertia of the tire around the peg is 2MR2 . If the tire is displaced from equilibrium and starts swinging back and forth, what will be its frequency of oscillation
Answers
The frequency of oscillation given the moment of inertia of the tire around the peg will be f = 1/2π✓(g/2R).
How to calculate the frequency of oscillation?Given I = 2MR²
Torque = Mgsin(theta)R
Here, w = 2πf.
f = 1/2π✓(MgR/I)
f = 1/2π✓(MgR/2MR²)
f = 1/2π(✓g/2R)
Therefore, the frequency of oscillation is f = 1/2π(✓g/2R).
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1. Using a block-and-tackle, a mechanic pulls 8. 2 m of chain with a force of 90 N in
order to lift a 320 N motor to a height of 2. 9 m.
a) What is the AMA( Actual mechanical advantage) 10 points
b) What is the IMA (Ideal Mechanical Advantage) 10 points
c. What is the efficiency of the block-and-tackle? (10 points)
Answers
a) To calculate the actual mechanical advantage (AMA), we use the formula:
AMA = Output Force / Input Force
In this case, the output force is the weight of the motor being lifted, which is 320 N. The input force is the force applied by the mechanic, which is 90 N.
AMA = 320 N / 90 N
AMA ≈ 3.56 (rounded to two decimal places)
Therefore, the actual mechanical advantage (AMA) is approximately 3.56.
b) The ideal mechanical advantage (IMA) of a block-and-tackle system is determined by the number of supporting ropes or chains. Since the problem does not mention the specific arrangement of the block-and-tackle system, we cannot calculate the exact IMA. However, in a simple block-and-tackle system, the IMA is equal to the number of rope segments supporting the load. If we assume a simple one-rope segment system, then the IMA would be 1.
c) Efficiency is defined as the ratio of output work to input work, expressed as a percentage. The formula for efficiency is:
Efficiency = (Output Work / Input Work) x 100
Output work is calculated as the product of the output force and the distance lifted. In this case, it is 320 N multiplied by 2.9 m. Input work is calculated as the product of the input force and the distance moved. Here, it is 90 N multiplied by 8.2 m.
Output Work = 320 N * 2.9 m = 928 N·m
Input Work = 90 N * 8.2 m = 738 N·m
Efficiency = (928 N·m / 738 N·m) x 100
Efficiency ≈ 125.88% (rounded to two decimal places)
Note: The efficiency value obtained here is higher than 100%, which is not physically possible. It is likely due to rounding errors or approximations made during the calculations. In practical scenarios, efficiencies are always less than 100%.
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