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Consider a particular star which is not too different from our sun. Its radius is 8.50 108 m, and its total power output is 5.50 1026 W.
(a) Assuming that the star's surface emits as a black body, calculate its surface temperature.
K
(b) Using the result of part (a), find ?max for the star.
nm
What current must exist in the conductor for the tension in the supporting wires to be zero when the magnetic field is 3.40 T into the page
Dan is gliding on his skateboard at 2.00m/s. He rapidly jumps backward off the skateboard, kicking the skateboard forward at 8.00m/s (as measured by an observer on the ground). Dan's mass is 60.0kg and the skateboard's mass is 7.00kg.
A railroad car fo Mass M=2000kg and speed V0= 8.50m/s collides and couples to another car of equal mass and initially at rest. What is the final speed of the two couple railroad cars
An 8300-pF capacitor holds plus and minus charges of 1.35×10?7C. What is the voltage across the capacitor
A 15.0kg block is attached to a very light horizontal spring of force constant 550N/m, Find the maximum distance that the block will compress the spring after the collision
What magnitude of charge must be given to the drop
Two point charges, +5.0 µC and ?3.0 µC, are separated by 4.0 m. What is the electric potential energy?
question1an artillery shell is fired with an initial velocity of 310 ms at 57.0deg above the horizontal. it explodes on
A uniform Gravitational Field: Calculate the Reimann curvature for the metric ds^2=-(1+gx)^2dt^2+dx^2+dy^2+dz^2, thereby showing this spacetime is flat. Find a coordinate transformation that puts this metric into the usual Minkowski form.
The density of petrol is 730 kg/m^3 at 0 degrees C. Its average coefficient of expansion is 9.60 * 10^-4 degrees C. Assuming you have a 45 litre full tank, how many extra grams of petrol would you get
A neutral pie-meson is particle that can be created by accelerator beams. If one such particle lives 1.40 x 10^16 s as measured in the laboratory, what is its velocity relative to the laboratory
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.5 °C. What should be the minimum temperature of the hot heat reservoir
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