In a photoelectric effect experiment the threshold wavelength of light is 380 nm. If the wavelength of incident light is 260 nm, the maximum kinetic energy of emitted electrons will be: 1237 Given E (in eV) a (in nm) 1. 1.5 eV 2. 3.0 eV 3. 4.5 eV 4. 15.1 eV

Q: A wheel 0.25 m in radius turning at 4π rad/s increases its speed to 22π rad/s in 9 s. Find tangentia...

A: Radius of wheel (r) = 0.25 m  Initial angular speed = 4π rad/s  Final angular speed = 22π rad/s  in ...

Q: An object is launched at a velocity of 41 m/s in a direction making an angle of 57 degrees upward wi...

A: The object is launched with an initial velocity of u=41 m/s making an angle of 57o with the horizont...

Q: What causes APC ferrules to have less back reflection than UPC ferrules is not well understood.

A: Ultra-polished connector UPC is created by extensive polishing of the tips that increases the effici...

Q: A 3-kg block has a speed of v=8.5 m/s at point O as it travels along a rough incline OA with uk = 0....

A: Given:mass of the block, m = 3kginitial speed, u = 8.5 m/sangle of inclination,  θ = 20ocoeff og kin...

Q: The world record for the men's high jump is 2.45 m. To reach that height, a) what is the minimum amo...

A:

Q: Two boats leave the shore at the same time and travel in the directions shown. If VA = 20 ft/s and v...

A:

Q: It is not uncommon during the serve of a professional tennis player for the racket to exert an avera...

A:

Q: f. Find the distance traveled for a total time of 30 seconds interval.  g. Find the average velocity...

A:

Q: Q5 a) Choose the correct answer. 1- The ratio of the speed of light in vacuum to the speed in the ma...

A:

Q: 5.7 g quarter sits 25 cm from the axis of rotation on a turntable that has a period of rotation of 1...

A: solution: Mass of quorter m= 5.7g            Time period t= 1.8 sec Distance x = 25cm x = 0, 25 m (a...

Q: What form of magnetism if present in almost all substances? A. diamagnetism B. ferromagnetism C. ...

A: Diamagnetism is present in almost all substances. Option (a) is correct choice. Diamagnetism occurs ...

Q: Derive an equation that relates the positions of the bright maxima from a diffraction grating to the...

A:

Q: While training for a dog show, a 3.8 kg dog does 32 pushups in a minute, displacing its center of ma...

A:

Q: A stone is projected vertically upward from the top of a 120-m high tower at a initial velocity of 3...

A:

Q: A stone is thrown horizontally from the top of an incline that makes an angle e with the horizontal....

A:

Q: A 1.9-m long gas column that is open at one end and closed at the other end has a fundamental resona...

A: Given Length of the pipe is given as l=1.9 m Fundamental frequency is given as f0=67.0 Hz The pipe i...

Q: A cylinder of fixed capacity 44.8 litres contains helium gas at standard temperature and pressure. W...

A:

Q: What is the amount of charge across the plates of capacitor #3 (C3)? Select one: a. 28.8 micro Coul...

A:

Q: Determine the mass and the weight of the air contained in a room whose dimensions are 6m xóm x 8m. A...

A:

Q: The gravitational force between two objects is 2700 N. What will be the gravitational force between ...

A:

Q: To reach a vertical leap of 1.05 meters, what should be the take off speed of an athlete?

A:

Q: Find the time of oscillation of a pendulum having a length of 12m long? O 0.1158 s O 7.66 s 6.95 s 4...

A: Given:  Length of the pendulum = 12 m We have tp find the time of oscillation.

Q: Work-energy theorem: A 7.0-kg rock is subject to a variable force given by the equation F(x) = 6.0 N...

A:

Q: 2. Use the characteristics of the omb force to explain wny proportional to the plate area of a capac...

A:

Q: A metal can containing condensed mushroom soup has mass 230 g, height 11.0 cm and diameter 6.38 cm. ...

A:

Q: 6. A 3.0 kg mass is attached to a 5.0 kg mass by a strong string that passes over a frictionless pul...

A:

Q: Density, specific weight, dynamic viscosity, kinematic viscosity, surface tension and vapor pressure...

A:

Q: Study the free-body diagram below and choose the statement that best describes the object's motion N...

A:

Q: Does any vector have length zero except a zero vector? If yes, then provide an example, else, prove ...

A: A vector is represented by both it's magnitude and direction .Length of vector represents magnitude ...

Q: Residents of Hawaii are warned of the approach of a tsunami by sirens mounted on the top of towers. ...

A: decibel level of sound of siren at a distance of 2 m = 128 dB   

Q: Part A A small car with mass 0.760 kg travels at constant speed on the inside of a track that is a v...

A:

Q: The value of acceleration due to gravity at Earth's surface is 9.8 ms2. The altitude above its surfa...

A:

Q: What is the velocity of a bag of mangos (mass of 23 kg) with the same momentum as an elephant with a...

A:

Q: ss of the object is 80 kg . Find the weight of the object ?

A: We know that the weight of the object is defined as the product of mass and the acceleration of grav...

Q: Lexy throws a dart with an initial velocity of 25 m/s at an angle of 60° relative to the ground. Wha...

A:

Q: Page since h(0) = h.. Example 269: A ball is thrown upward with an initial velocity of of 40 ft/sec ...

A:

Q: 4. A car leaves point A and drives at 80 kmhr [60°WofN]. The car then heads north at 60 km/hr arrivi...

A: Consider the given data as below. A car leaves point A, v1=80 kmhr A car leaves point B, v2=60 kmhr ...

Q: Directions: Rank the parallel plate capacitors below from lowest capacitance to highest. Write your ...

A:

Q: When the human body is at rest, the heart pumps 4.6 L of blood into the aorta every minute. During ...

A:

Q: A volcano erupted and spit a rock in the atmosphere at an angle of 35 degrees with the horizontal wi...

A:

Q: A particle is constrained to travel along the path. If x = (4t*) m, where t is in seconds, determine...

A: Given  X(t) = 4× t4 m  Y2(t) = 4× X(t) The acceleration at time t = 0.5 sec is given as 

Q: The current density of a silver wire is 3.20x106 A/m2 . If the current and the drift velocity of the...

A: Given that                      The current density of the silver wire (J) = 3.20×106A/m2           ...

Q: Light traveling in first medium with a speed of 1.5x108 m/s, strikes the surface of a transparent ma...

A:

Q: while grocery shopping. Which of the following free-body diagrams best represents shopping cart in r...

A:

Q: Given a series circuit with total voltage of 15, R1 = 7 Q, R2 = 4 Q, and R3 = 2 Q. Find the total re...

A:

Q: Suppose that 2J of work is needed to stretch a spring from its natural length of 30 cm to a length o...

A:

Q: Assuming a successful man-made satellite rotates around the earth at a rate of 5.2 rev in 9.4 days. ...

A:

Q: The maximum applied force a plastic grocery bag can withstand before ripping is 245N. If of 19.0 kg ...

A: Given  Maximum applied force bag can withstand is  Fmax = 245 N  Mass of groceries ,M = 19.0 kg  acc...

Q: What is the purpose of a parallel plate capacitor? ii. A parallel plate capacitor has two square pl...

A: Answer:-  Answer (1)  A parallel plate capacitor can only store a finite amount of energy before die...

Q: irrent density of a silver wire is 3.20x106 A/m e drift velocity of the electrons through the wi

A: Given Curtrent density ,J=3.2×106  A/m2current , I=2 ADrift velocity of electron , v=3.2×10-4  m/s

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.