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There are two categories of ultraviolet light. Ultraviolet A ( UVA ) has a wavelength ranging from 320nm to 400nm . It is not so harmful to the skin and is necessary for the production of vitamin D. UVB, with a wavelength between 280nm and 320nm , is much more dangerous, because it causes skin cancer
Part A What are the ranges of the wave numbers for UVA?
kmin, kmax=____________rad/m
Part B What are the ranges of the wave numbers for UVB?
kmin,kmax=______________rad/m
How long would it be on the incline before it arrives back at bottom.
A rectangular loop is located next to a long straight wire carrying a current of 30.0 A. What is the direction of the net force on the loop
Consider a single electron, with a mass of 9.1×10?31kg , subject to a single force equal to the weight of a penny, 2.5×10?2N
At a certain instant in time, in an electromagnetic wave, the electric field vector points to the north and the magnetic field vector points vertically downward.
Mary throws a ball to Suzy, who is standing 25 meters away. Suzy catches the ball from the same height at which it was thrown. calculate initial vertical velocity and Horizontal velocity
A 101 g ball is tied to a string. It is pulled to an angle of 5.20 degrees and released to swing as a pendulum. How long is the string
Note down that since each oscillator is attached to two "springs", and each "spring" is half the length of the interatomic bond, the effective interatomic spring stiffness for one of these oscillators is times estimated value given above.
A coin placed 29.0 cm from the center of a rotating, horizontal turntable slips when its speed is 50.2 cm/s, What is the coefficient of static friction between coin and turntable
The ratio of the average acceleration values is a1/a2 = 1.24. Find out the velocity of the car at the end of the initial ten-second interval.
The direction angle of a vector is defined as its positive angle relativeto the positive x-axis.
An 0.8kg baseball with an initial velocity of 40m/s is hit with a baseball bat so that its recoil velocity is 60m/s in the exact opposite direction. what is the average force the bat puts on the ball
A piece of copper wire has a resistance per unit length of6.1510-3?/m. Find the magnetic field strength at the center of the coil
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