0/ Show that a free electron at rest cannot absorb a photon.

Q: Neutron is a neutral particle with a mass of 1.67x10^-27 kg. Compute the de Broglie wavelength for…

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Q: Q1: moving coil meter has coil resistance of (20 2 ) and FSD current of ( 400 Micro amperes ). Find…

A: A galvanometer is an electromechanical measuring instrument for electric current. Early…

Q: Find the value of kinetic energy

A: Given data : Mass=m Velocity=V   Required : Kinetic energy

Q: Two point charges are separated by a distance of 10.0 cm. One has a charge of -25µC and the other…

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Q: A circular disk with a radius of 0.38 m is subject to 2 tangentially applied forces. The disc is…

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Q: speed of 900km/h. The wind is blowing towards the north at 100 km/h. What is the resultant velocity…

A: R= √[  A2 + B2 + 2ABcos(theta) ] A = magnitude of vector A B= Magnitude of vector B theta = angle…

Q: Where did you get the 352? How about the displacement asked?

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Q: What’s the relationship between the angle of release, the maximum height and the range of a…

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Q: Part A The flash unit in a camera uses a special circuit to "step up" the 3.0 V from the batteries…

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Q: 8.9 · A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t = 0, the…

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Q: A  2.0 mm diameter iron wire ( resistivity, ρ = 9.7 x 10–8 Ω-m) carries a current of 2.5 A.…

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Q: BOX 1.25m 34° Assuming no friction and the box starts at rest, what will be the speed of the box at…

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Q: A 2.0 mm diameter iron wire ( resistivity, p = 9.7 x 10- 0-m) carries a current of 2.5 A. Determine…

A: Solution: Given that diameter =  2mm resistivity = 9.7x10-8 ohm m current = 2.5 A length = 20 m to…

Q: e speed of light in material rad ed Cherenkov light. Find the m ule that an electron must have

A: from the definition of refractibe index,n=cvv=cn=3×1081.33=2.25×108m/s.Now, E=12mv2…

Q: The total distance travelled is km. The net displacement is km. displacement at t=18 hrs is km The…

A: Displacement is straight line distance between initial and final position and distance simply the…

Q: angle

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Q: 8. What is the mass defect of a fission reaction that releases 2.9 x 10^-11 J of energy? (A) 3.2x 10…

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Q: T=? 40° 400 N

A: We have a system where a rope having tension T is balancing a stich of length L which is carrying a…

Q: A golf club weighing 1.5 kg strikes a 45 g golf ball at a speed of 70 m/s. The club and the ball…

A: Given data: The mass of the golf club is M=1.5 kg. The mass of golf ball is m=45 g. The speed of…

Q: A light, with wavelength of 1 = 550 nm, passes through a slit and shines on a screen that is at a…

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Q: A wire carrying 5 A of current is oriented at 27° with respect to the magnetic field whose magnitude…

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Q: A heart defibrillator is used to enable the heart to start beating if it has stopped. This is done…

A: Power associated = VI  V = potential = 25V And I = current = 12A time = 3ms Also, power = energy…

Q: Two masses are connected by a frictionless cord on a frictionless surface as shown in the figure…

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Q: A. Evaluate the following:

A: We will evaluate each of these

Q: (c) As shown in Figure 3, there are 2 non-conducting rings each with uniform charge q1 and 92. Both…

A: The electric field due to positive charge is away from it and due to negative one is towards it .…

Q: What is the magnetic force experienced by a current-carrying wire oriented parallel to a uniform…

A: Magnetic force on current carrying wire is given by F = I LB sin θ                       Where ,…

Q: 15.8 V 3.2 0 40 0.8 Q 9.5 V Loop 1 A 1.5 N 20 0.7 a 3.8 N ½ 28 V Loop 2 17 V 0.50

A: To solve the given problem apply KVL and KCL. According to KVL, the total voltage drop in a closed…

Q: Based on the same question, (Blue monochromatic light is used to shine on the Potassium metal…

A: The energy of blue monochromatic light is 2.645 eV. a) Write the expression for the kinetic energy…

Q: (a) Figure 4 shows 2 non-conducting spherical shells on the x-axis separated by L = 5.0 cm. The…

A: Total charge in the sphere will be given as the Q= charge density× surface area of the sphere .

Q: 15.8 V 3.20 40 0.8 Q 9.5 V "(oop 1 1.5 0 20 0.7 0 3.8 0 28 V 17 V 0.5 0 Which of the following…

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Q: What determines whether electrons will move when charging by friction? electron affinity metallic…

A: Solution: Given: Which property determines whether electrons will move when charging by friction?…

Q: Two 7.0 cm x 7.0 cm metal electrodes are spaced 1.0 mm apart and connected by wires to the terminals…

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Q: A circular flat surface has a radius of 3.5 ft in a uniform magnetic field. Calculate the magnetic…

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Q: The force needed to stretch a spring by x meters is given by F(x) = 7x Newtons. How much work is…

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Q: A 4 cm object is placed 8 cm away from a converging lens with a focal length of 6 cm. d. Summarize…

A: We use lens formula to solve the problem

Q: The concrete (a=13.8 x 10-6/C°) section of a certain super highway are designed to have a length of…

A: ∆L = Lo[ a×∆T] ∆T = change in Temperature = 50°-10° = 40°C a = linear thermal coefficient =…

Q: Three resistors: R1 = 5 0,R2 = 3 Q, and R3 = 4 Q are connected in series to each other. A voltmeter…

A: Given Resistance of the resistors are R1=5 Ω, R2=3 Ω and R3=4 Ω Voltage across R2 is V2=6 V   We…

Q: The blue monochromatic light is used to shine on the Potassium metal surface in the photoelectric…

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Q: A high current-carrying transmission wire has a length of 2.00 m placed in a uniform magnetic field…

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Q: A candle 10 cm high is placed 25 cm in front of a plane mirror. Draw a ray diagram to show how the…

A: Given data: The height of candle is h=10 cm. The distance of candle from mirror is u=25 cm.

Q: A circular steel wire 2.00 m long must stretch no more than 0.25 cm when a tensile force of 400 N…

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Q: Ry20 R-150 V, - 30 V R20

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Q: radioactive isotope decays into thorium-232 and an alpha particle. What was the original particle

A: Total atomic number and mass number should be equal to both sides of equation.

Q: FR is the resultant of the two forces, F1 and F2 as shown in Fig. Q1(b). Compute the magnitude of Fı…

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Q: A rectangular brass plate has a dimension of 50 cm x 30 cm at 10oC. At what temperature should it be…

A: Solution: Given that rectangular brass plate has a dimension of 50 cm x 30 cm T1 = 10 C increase its…

Q: Why does the balloon filled with water did not pop out like the balloon filled with air when it is…

A: Comparison between air balloon and water balloon:

Q: Coulomb Force vs Charge Separation Graph 2500 2000 1500 1000 500 0.02 0.04 0.06 0.08 0.1 0.12 Charge…

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Q: Which of the following is an example of grounding? rubbing your hair with a rubber balloon…

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Q: What is coherence and interference of Light? What is laser?

A: Answer: Coherence of light and interference of light means

Compton effect

The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.

Recoil Velocity

The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.