Explain why ultraviolet waves are dangerous to the body?

Q: What is wedge ?

A: GIVEN;  Define wedge and its principle on which it works ?

Q: 44) What is the change in entropy of the ice when a 0.050-kg ice cube at 0°C melts? The latent heat…

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Q: Q5/ The y-coordinate of a particle in curvilinear motion is given by y = 4t3 - 3t where y is in…

A: We have the position coordinate of a particle moving in y direction given by y=4t3-3t where t is the…

Q: What is inclined plane?

A: Given; Define the inclined plane and its use,  with two examples where it is used ?

Q: An initially stationary box of sand is to be pulled across a floor by means of a cable in which the…

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Q: An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of…

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Q: 3.) (Based on Neamen - Review Question 7.6) - Why does the depletion region width increase when a…

A: When P-region is connected to negative terminal and N-region to positive terminal of the battery,…

Q: Given Five vectors whose lengths and dirction – senses are as follows: Aa is 1.5 inch long and 90…

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Q: singly ionized helium (atomic number = 2) is initially in its second e. It ends up in the ground…

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Q: 13. Which of the following statements is valid for a projectile? Take upward direction as positive.…

A: Projectile motion is the motion of a body projected into the air. After the initial force that…

Q: A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A…

A: Given:-  A roller coaster at an amusement park has a dip that bottoms out in the vertical circle of…

Q: d) 64 Q2: A block of mass 0.3 kg is dropped from rest at a height 2 m directly above the top of a…

A: Part (2): Given: The mass of the object is 0.3 kg. The height of the object is  2 m from the ground.…

Q: Instruction: Answer the problems completely. Show your complete solution. Write legibly. A cylinder…

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Q: 10) An aluminum rod 17.400 cm long at 20°C is heated to 100°C. What is its new length? Aluminum has…

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Q: 4. Rank the torques in order from largest to smallest: A: mass mo, radius ro B: mass 2mo, radius ro…

A: Given  Rank the torque in order from largest to smallest.  A.. mass m0 radius r0  , force F0 B..…

Q: 11: Block A, with a mass 30 kg, rests on the incline. The oefficient of static friction between the…

A: Given: The mass of block A is 30 kg. The angle of the inclination is 35o. The coefficient of static…

Q: Q3/A subway traveling at 40 km/hr decelerates as it reaches point A and slows down with a constant…

A: When acceleration is constant, all the equations of motion are applicable.

Q: roller coaster moving on a vertical metal loop has a radius of 6.0 m. if the coefficient of friction…

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Q: A point charge q = 0.01C is moved from point A to point B in an electric field. If the electric…

A: Write the expression for the change in potential energy.

Q: beryllium-9 ion has a positive charge that is double the charge of a proton, and a mass of 1.50 ✕…

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Q: A block on the inclined plane will just begin to slip if the inclination of the plane is 65.  When…

A: in this question we use FBD of block for both cases and then solve it with equation .

Q: 9. (Target K1) You are sitting under a tree, enjoying a nice summer day. Unbeknownst to you, your…

A: height of friend above the ground = 3.5 m height of your head above the ground = 0.75 m the height…

Q: A proton moving at speed v = 1.00 x 106 m/s enters a region in space where a magnetic fi eld given…

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Q: The system in the figure is released from rest. The coefficient of kinetic friction between block A…

A: Work done by any force is given as                 W = F×d            Where ,…

Q: A student presses a book between his hands, as figure A indicates. The forces that he exerts on the…

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Q: 1. Two electrons are separated by an extremely large distance. They approach each other with initial…

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Q: b) 1lk c) 19k d) - 11k Q4: A stone is thrown vertically upward with an initial speed of 14 m/s. It…

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Q: 3. A 6.50 kg block is pressed against a vertical wall by a force (F), as shown in the figure below.…

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Q: Concept Simulation 9.1 illustrates how the forces can vary in problems of this type. A hiker, who…

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Q: What is inclined plane? What it its use ? Give two examples where it is used.

A: Inclined plane : An inclined plane is a simple machine that consists of a sloping surface connecting…

Q: Shown in the figure is a 258-kg homogeneous cylinder that rolls without slipping on the horizontal…

A: Rotation and translation are 2 attributes associated with motion. Rotation is when body revolves…

Q: 0.450-kg ice puck, moving east with a speed of 5.60 m/s , has a head-on collision with a 0.990-kg…

A: Given: The mass of the ice puck is 0.45 kg and moves at 5.6 m/s in the east direction. The mass of…

Q: The figure shows the cross section of a long conducting cylinder with inner radius a= 2cm and outer…

A: Magnetic field

Q: Q13: A 4 kg mass is projected down a rough ( shown. )circular track (R = 2 m) as The speed of the…

A: R = 2 m mass (m) = 4 kg vA = 4 m/s vB = 6 m/s

Q: An electroscope is positively charged. Because of this, its leaves are separated. When an object is…

A: Given, An electroscope is positively charged. Because of this, its leaves are  separated. When an…

Q: In the figure, block 1 has mass m₁ = 460 g, block 2 has mass m₂ = 580 g, and the pulley is on a…

A: In the given question, Mass of block 1 = m1 = 460g = 0.46kg Mass of block 2 = m2 = 580g = 0.58kg…

Q: Q5/ The y-coordinate of a particle in curvilinear motion is given by y = 4t³ - 3t where y is in…

A:

Q: 1. Under what conditions is the average velocity equal to the instantaneous velocity? a) when an…

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Q: A block of mass m₁ = 3.22 kg on a frictionless plane inclined at angle 0 = 30.3° is connected by a…

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Q: Protons in a particle accelerator receive energy from electric fields to be accelerated to…

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Q: The two charges in the figure below are Separated by d = 2.50cm (Let 9₁ = -114.5nC and 90 = 29.5 nC)…

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Q: A converging lens of focal length 20 cm is placed 37 cm in front of a screen. At what distance that…

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Q: Exercise 8.62 A small rocket burns a mass 5.10×10-² kg of fuel per second, ejecting it as a gas with…

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Q: 1. A soccer player is positioned 100ft from a wall, which is 35ft high. The player wants the ball to…

A: Given: Range of the projectile = 150 ft Height of the wall = 35 ft  Velocity of projectile = 80…

Q: isplacement Q6: An elevator has a mass of 1600 kg and is carrying 200 kg passengers. A constant…

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Q: if the speed of light passing through silicon is 7.5  107 m/s, what is the refractive index of…

A: Given data                Speed of light passing through silicon (v) = 7.5×107 m/s

Q: A cannon fires a shell directly at you from 2000 m away, at a speed of 216 m/s. The speed of sound…

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Q: A softball having a mass of 0.25kg is pitched at 86.4km/h. By the time it reaches the plate, it may…

A: Write the given values with the suitable variables. m=0.25 kgu=86.4 km/h=86.4×10003600 m/s=24…

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.