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Color Problem: Compute the Planck function in wavelength for filter centroids B=4400A, V=5500A, R=6200A and I=7700A, for temperatures 3000K, 5000K, 10000K and 20000K. The temperatures correspond roughly to M,G,A,B stars. Using the Planck curves as fluxes (dlambda=1A) is fine. Compute the colors in terms of magnitude: B-V and R-I for each case. Use the Vega system.
Consider a very high energy cosmic ray photon, with energy 109mp = 1018 eV as measured in Sun's rest frame, scattering off a cosmic microwave background photon with energy 2 x 10-4 eV . Establish the maximum energy of the scattered photon.
A narrow beam of light with wavelengths from 450nm to 700nm is incident perpendicular to one face of a 40.00degrees prism made of crown glass, What is the angular spread of the beam after passing through the prism
A proton and an Au11+ are moving with equal velocities perpendicular to a uniform magneticfield. The Au11+ has 11times the charge as the proton and has 197times its mass. The ratio of the acceleration of theAu11+ to that of the proton is what?
A dipole is located at the origin, and is composed of charged particles with charge +e and -e, separated by a distance 3 10-10 m along the y axis. The +e charge is on the -y axis.
Find out the normal force exerted on the crate by the elevator.
a block of mass m 10 kg is pushed across a rough table with a force applied at an angle of 28o with respect to the
The net force acting on an object constrained to the x axis is given by Fx(x) = x3 - 4x. (the force is in newtons and xin meters). Locate the positions of unstable and stable equilibrium. Show that each position is stable or unstable by calculating t..
A 4.60-kg ball is dropped from a height of 10.0m above one end of a uniform bar that pivots at its center. how high will the ball go after the collision
A 2360{\rm kg} satellite used in a cellular telephone network is in a circular orbit at a height of 750{\rm km} above the surface of the earth. What is the gravitational force on the satellite
Two solid spheres, each of mass m, are rolling without slipping with a speed v. If the spheres have radii R1 and R2 with R1/R2 = 5.5, what is the ratio of their kinetic energies
If a mass is hung from a spring (whose spring constant is 2 pounds per foot) stretches the spring 0.4 meters (m), What is the force on the spring in Newtons (N)?,
A child is riding a merry-go-round, which has an instantaneous angular speed of 1.25 rad/s and an angular acceleration os 0.745 rad/s^2. What angle does the acceleration of the child make with the tangential direction
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