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If the sun subtends a solid angle (omega) on the sky, and the flux from the Sun just above the Earth's atmosphere, integrated over all wavelengths, is F(d) show that the flux at the solar photosphere is ((pi)F(d))/(omega)
The angular diameter of the Sun is 0.57 degree. Calculate the solid angle subtended by the Sun, in Steradians
The solar flux at Earth isF(d) = 1.4 x 10^6 erg/(s*cm^2)use (B) and the Stefan Boltzmann law to derive the effective surface temerature of the Sun
Derive an expression for the surface temperature of the Sun, in terms only of its solid angle, its flux per unit wavelength f(lambda1) at Earth at one wavelength (lambda 1) and its fundamental constants
Explain how does a magnitude of the electrical force between a pair of charged particles change when they are brought to half their original distance of seperation?
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
Five identical particles of mass m = 0.30 kg are mounted at equal intervals on a thin rod of length scripted l = 1.13 m, find the angular momentum of the system
The centers of a 15kg lead ball and a 50g lead ball are separated by 10cm, What is the ratio of this gravitational force to the weight of the 50g ball
A nozzle is now attached to the end of the hose. If the nozzle diameter is one-third the diameter of the hose, what is the speed of the water leaving the nozzle
A uniform-density 8 kg disk of radius 0.20 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with the constant force of 45 N through a distance of 0.7 ..
Two blocks, masses m1 and m2 are connected by an ideal string passing over an ideal pulley. Find the acceleration of each block
Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1850 kg m2. Calculate the angular velocity of the turntable
Speedboat A negotiates a curve whose radius is 152 m. Speedboat B negotiates a curve whose radius is 204 m. Each boat experiences the same centripetal acceleration. Illustrate what is the ratio vA/vB of the speeds of the boats?
The potential difference between two points in a wire 10 m apart is 12 V. When the current density is 4*10^7 A/m^2. find the resistivity of the material in the wire
A block is pushed up a 20.0 (degrees) frictionless incline with an initial speed 12.0 m/s. How much time does it take to return to its starting position
Light of wavelength 550. nm in air is found to travel at 1.96x10^8 m/s in a certain liquid. Determine the frequency of the light in air
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