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Planet has a radius of 6400 km. It radiates energy like a black body. Use the Stephan Boltzmann Law to calculate the temperature of this planet due to the star's radiation.
Given that intensity is equal to 1466.83 watts/m^2.
Two point charges of 2 C and –3 C are separated by 6 cm. Is the force attractive or repulsive? Describe. What is the magnitude of the electrostatic force among them?
Given a coaxial cable with a solid inner conductor of radius a, anouter conductor with radius from b to c so that a
If the mass of the block is 100 g, and 450 g of standard masses are placed on top of it, What is the magnitude of the normal force
The earth's magnetic field, with a magnetic dipole moment of 8.5×1022Am2, is generated by currents within the molten iron of the earth's outer core. What is the current in the current loop
Suppose R = 190_ohm and C = 40muF in a (charging) RC-series circuit with a 10_V power source. What is the maximum charge on the capacitor? What is the charge on the capacitor after 0.0012_s?,
A concave mirror (f = 50. cm) produces an image whose distance from the mirror is one-third the object distance. Decide (a) the object distance and (b) the image distance. Treat the fraction as an exact number.
Galaxy A is moving away from us with a speed of 0.75c relative to the earth. Galaxy B is moving away from us in the opposite direction with a relative speed of 0.55c. Assume that the earth and the galaxies are moving at constant velocities, so they a..
At a given instant in time, a 10-kg rock is observed to be falling with an acceleration of 5.5 m/s2. What is the magnitude of the force of air resistance acting upon the rock at this instant? Round the final answer to the nearest whole number.
A wire lying along an x axis from x = 0 tox = 0.922 m carries a current of 2.18 A in the positive x direction. The wire is immersed in a non uniform magnetic field given with = (4.64 T/m 2 )x 2 - (0.539 T/m 2 )x 2 . In unit-vector notation, ..
Starting with the left-most column, populate the boxes from left to right without skipping empty boxes. Ties should be grouped in the same box
Determine the forces that support posts 1 and 2 (separated by 1.4 m) exert on the board when a 60-kg person stands on the end of the board 2.8 m from support post 2.
Two cicadas, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.10 , while Milada jumps horizontally with an initial speed of 98.
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