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Measurements on two stars indicate that Star X has a surface temperature of 6127°C and Star Y has a surface temperature of 12127°C. If both stars have the same radius, what is the ratio of the luminosity (total power output) of Star Y to the luminosity of Star X? Both stars can be considered to have an emissivity of 1.0.
In an L-R-C series circuit, the rms voltage across the resistor is 28.3 V, across the capacitor it is 88.2 V and across the inductor it is 50.3 V. What is the rms voltage of the source
following questions are based on quality assurance and mechanical checks of a linac linear accelerator mechinea in
A wheel is rotating freely at angular speed 920 rev/min on a shaft whose rotational inertia is negligible. What fraction of the original rotational kinetic energy is lost
A 55.6-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.57 g and a charge of magnitude q. Find the magnitude of the electric force acting on the ball
A horizontal wire of length 0.11 m, carrying a current of 3.0 A, is placed in a uniform external magnetic field. Determine the magnitude of the external magnetic field
The coefficient of static friction between the tires of amotorcycle and the road is 0.56. what is the radius of the tightest unbanked turn that the driver can hope to handle
Consider a regular hexagon of side length, L=10cm. A charge, Q=2uc, is located at each vertex(there are 6). find the electostatic potential at the center of the hexagon
You take a trip to Pluto and back (round trip 11.5 billion km), traveling at a constant speed (except for the turnaround at Pluto) of 44500 km/hr. How long does the trip take, in hours, from the point of view of a friend on earth
A dog trots 3.6 meters east and 5.0 meters north. What are the magnitude and direction of the dog's displacement with respect to the original position.
The maximum pressure that can be obtained in your local mechanic's hydraulic pump is 2.0 x 10^5 Pa. what is the largest mass (of car) for which the pump will work
A ray of light in air is incident on a planar surface of silica. The refracted ray makes an angle of 27.2? with the normal. Refraction index for silica is 1.41. Calculate the angle of incidence. Answer in units of ?.
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