Suppose an electron, in the H atom, undergoes a transition from n_i=8 to n_f=2. Calculate the wavelength of the light that is emitted and the colour of the light.

Q: Two spaceships are heading towards each other with speeds of 0.5c. One ship shines a laser beam at…

A: Speed is light is invariant under lorentz transformations.

Q: Does the center of gravity coincide with the fulcrum? Why? Describe the relationship of center of…

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Q: A lead rod has a length of 37.9m when the temperature is 7.3 degrees celcius. klhat is its length…

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Q: In the circuit in the picture, the resistors are R₁ = 100.0 kn, R₂ = 150.0 kn, R3 250.0 kn, R4 =…

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Q: A proton travels with a speed of 4.90 x 106 m/s at an angle of 62° with the direction of a magnetic…

A: Given Speed of the proton is v=4.90×106 m/s Angle with the direction of the magnetic field is θ=62°…

Q: A block-spring system undergoes a simple harmonic motion on a frictionless horizontal table. Its…

A: Given: Equation of displacement x(t)=0.3 cos πtt-φ To find: Time is taken to move from x1=0.1 m to…

Q: A long horizontal wire carries 22.0 A of current due north.  Part A) What is the net magnetic field…

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Q: A spring with a spring constant of 0.3 N/cm is attached to a 4.6 kg mass. If you were to pull and…

A: Given:  K= spring constant= 0.3 N/g cm = 0.30.01 N/m =30 N/mm= mass of the block= 4.6 Kgspring force…

Q: What type of heat transfer is seen in the picture? Step 1 O a. insulation O b. convection O c.…

A: Insulation is reduction of heat transfer by creating a barrier between hot and cold object.…

Q: How much power is dissipated by the 2Ω resistor? Suppose that ΔV1 = 3V and ΔV2 = 6V

A: Given: ∆V1=3 V∆V2=6 V

Q: Organ pipe A, with both ends open, has a fundamental frequency of 250 Hz. The third harmonic of…

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Q: A boy walk 140 m due north, 85 m due east, 35 m due southeast, 38 m due west and then 19 m due…

A: Distance 140 m north, 85 m east, 35 m southeast, 38 m west, 19 m northwest. Displacement is a vector…

Q: 3. If you throw one object upward with an initial speed of 4m/s at 1.5m above the ground, find a)…

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Q: Shown in the figure below is an RC circuit. At t=0, the capacitor already contains a charge and as a…

A: Given,  V = 7.00 V R = 7575 Ω C = 3.57 x 10-6 F Initial voltage of capacitor, Vo = 7 V

Q: A travelling sinusoidal wave has this equation: y(x,t)=0.0450m sin (25.12m^(-1)x.…

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Q: A sinusoidal wave is described by the wave function y(x,t) = 0.04 sin(4x - 100nt + π/6), where x and…

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Q: According to Ohm's Law, if you were to plot the voltage V on the vertical axis and the current I on…

A: Given data:  Graph between voltage and current  Voltage on the vertical axis and current on the…

Q: An elevator car has two equal masses attached to the ceiling as shown. (Assume m = 4.10 kg.) m = T₂…

A: Given:- m= 4.1 kg a= acceleration= 1.7 m/s2

Q: It takes 2.67 ms for the current in an LR circuit to increase from zero to 0.80 its maximum value.…

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Q: A 4000-kg open railroad car coasts at a constant speed of 6.90 m/s on a level track. Snow begins to…

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Q: The specialty of an athlete on the women's track team is the pole vault. She has a mass of 44 kg and…

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Q: A thin aluminum rod lies along the x-axis and has current of I = 15.7 A running through it in the…

A: Solution: Given: Magnetic field B is perpendicular to current I.  1 mT = 10-3 T  θ = angle between…

Q: The total capacitance of three capacitors connected in series is equal to 6.25 µF. Two of the three…

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Q: In the figure, a 2100 kg demolition ball swings from the end of a crane. The length of the swinging…

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Q: As the object losses velocity, it also losses a. Elevation b. Kinetic energy c. Potential energy d.…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: ..54 Dispersion in a window pane. In Fig. 33-54, a beam of white light is incident at an- gle = 50°…

A: For a parallel slab, the incident and refracted light are parallel irrespective of the refractive…

Q: When a potential difference of 21 V is applied to a given wire, it conducts 0.45 A of current. What…

A: Given: Potential difference, V=21 V current, I=0.45 A To find: Resistance, R=?

Q: A bob of mass m, attached to a string of length L = 1.8 m, has a speed v = 1 m/s at the equilibrium…

A: Given:-  The mass of the bob is m. The length of the string is L = 1.8 m.  The speed of the bob in…

Q: A 406-N object is hung from the end of a wire of cross-sectional area 0.05 cm². The wire stretches…

A: The longitudinal stress on a wire is given by σ = FA, where F = the force acting on the wire and A =…

Q: lease check if this questions was done correctly, the answer is correct and I show the appropriate…

A: in this question we use projectile motion  equation.

Q: What is the net electric flux through each of the four surfaces shown in the figure below? (Assume…

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Q: At what distance will the intensity equal 0.0190 W/m^2 if at a distance of 1.40 m the intensity is…

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Q: 3. A uniform bar 12 m long and weighing 20N is hanged by means of a rope at point A and the loads…

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Q: A student walks 58 m through the school halls wearing a 6 kg backpack on her back. How much work, in…

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Q: A cart is being pulled forward by a hanging mass. What is the value of the change in its kinetic…

A: According to conservation of energy Total mechanical energy of system is constant.

Q: A capacitor C is charged to 20.0 V using a DC power supply. It is then discharged through a resistor…

A: The data given is as follows: 1. Potential, V0=20 V 2. Resistance, R=0.500kΩ=500Ω From the graph,…

Q: The angle through which a rotating wheel has turned in time t is given by q = 8.5t – 15.0t2 + 1.6t4,…

A: We know that angular velocity ω=dqdt angular acceleration α=dωdt=d2qdt2

Q: julia, a 72 kg computer gamer, catches a 12 kg computer monitor that charles threw at him. Before he…

A: Given: The mass of the Julia is 72 kg. The mass of the monitor is 12 kg. The initial velocity of the…

Q: The light beam shown in the figure below makes an angle of 30.4° with the normal line NN' in the…

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Q: After washing lettuce, you can dry the water from it using a salad spinner. You put the lettuce in…

A: Due to the centrifugal force, the spinning water will be driven outwards to the surface of the bowl.

Q: The figure shows the stress-strain curve for a material. The scale of the stress axis is set by s =…

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Q: A bungee jumper who is about to jump has her energy stored entirely as gravitational potential…

A: Initially the bungee jumper has her total initial energy stored as the gravitational potential…

Q: A water pipe having a 2.59 cm inside diameter carries water into the basement of a house at a speed…

A: Given:- d1 = 2.59 cm = 2.59×10-2 m d2 = 1.18 cm = 1.18×10-2 m v1 = 0.819 m/s P1 = 153 kPa = 153×103…

Q: Which of the following is the correct explanation for how wave speed is calculated? a O U Wave speed…

A: Given:-  Which of the following is the best explanation of how wave speed is calculated? Find:-  The…

Q: 10. In the French Open tennis tournament, a professional cameraman named Mike Francis useda digital…

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Q: A compressor is delivering air at a pressure of 8 bar gauge at the rate of 10 m³/min f.a.d. Average…

A: A compressor is a mechanical tool that lowers a gas' volume in order to raise its pressure. The term…

Q: The period of oscillation of an irregular shaped object is 1.2 s. Its mass is 1.0 kg and it is…

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Q: A 0.300-kg ice puck, moving east with a speed of 5.44 m/s, has a head-on collision with a 0.990-kg…

A: Mass of ice puck, mA = 0.3 kg Speed of ice puck before collision, vA = 5.44 m/s Mass of puck, mB =…

Q: The maximum energy of a vibrating mass is 3.00 x 10-2 joules. The amplitude of the oscillation is…

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Q: You have a parallel-plate 6.97 x 10-6 F capacitor that is charged to 0.00859 C. While the capacitor…

A: initial capacitance = 6.97×10-6 F charge (Q) = 0.00859 C New capacitance = 2.17×10-6 F

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: