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Question
Two stars of equal size have temperatures of 4000 K and 12,000 K. Which radiates more energy per second? How much more? What color will each appear? Which radiates more energy in the red part of the spectrum?
Find the current in the resistor (in A). Find the magnetic force on the bar (in N). Find the power dissipation in the resistor (in W). Find the rate of the mechanical work done by the agent pulling the bar (in W).
7.0×10?3mol of gas undergoes the process shown in the figure. What is the initial temperature? What is the final temperature
Two parallel conducting plates are separated by 10 centimeter, and one of them is taken to be at zero volts. Determine what is the voltage between the plates
What are effective values needed to describe an AC circuit? If the AC ammeter has a coil inside it, does this have any effect on the value of the current read on the ammeter?
The electric potential at x = 3.0 m is 120 V, and the electric potential at x = 5.0 m is 190 V. What is the electric field in this region
A 1100 car traveling at a speed of 40 skids to a halt on wet concrete where = 0.50. How long are the skid marks.
The angular position of a point on the rim of a rotating wheel is given by ? = 7.68t - 5.13t2 + 1.73t3, where ? is in radians and t is in seconds. find the angular velocities at the end of this time interval
A spring is hung from the ceiling. A 0.531 -kg block is then attached to the free end of the spring. When released from rest, the block drops 0.167 m before momentarily coming to rest, after which it moves back upward. (a) What is the spring constant..
A boat is moving at 30 kph in crossing a river in which the current is flowing at 12 kph. In what direction should the boat head if it is to reach a point on the other side of the river directly opposite its starting point. Check your answer with ..
A 40 kg box hangs 3 m from the right end. Find the tension in the rope.
The space shuttle is in a 300km -high circular orbit. It needs to reach a 610km -high circular orbit to catch the Hubble Space Telescope for repairs, How much energy is required to boost it to the new orbit
Determine all unknown pressures, volumes, and temperatures as you fill in the following table. Assume that ? = 1,4
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