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The Sun is primarily composed of hydrogen and helium, with traces of other elements. Its visible surface, the photosphere, is a dense and nearly opaque gas at a temp of 6000 K. Describe the spectrum that originates at this surface, due to the physical state of the material. Explain how the spectrum arises.
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 39 at 20°C. what is the temperature coefficient of resistivity
A 8.00 nF capacitor is charged up to 14.0 V , then disconnected from the power supply and connected in series through a coil. Calculate the maximum charge on the capacitor
An object is formed by attaching a uniform, thin rod with a mass of mr = 6.55 kilogram and length L = 5.16 meter to a uniform sphere with mass ms = 32.75 kilogram and radius R = 1.29 meter. Compute the moment of inertia of the object about an axis ..
A 20000kg rocket has a rocket motor that generates 3.0×10^5 N of thrust. What is the rocket's initial upward acceleration
An electric field of 1.86 kV/m and a magnetic field of 0.515 T act on a moving electron to produce no net force. If the fields are perpendicular to each other, what is the electron's speed
A 0.75m diameter solid sphere may be rotated about an axis through its center by a torque of 11.5m*N which accelerates it uniformly from rest through a total of 180 revolutions in 16.0 s.What is the mass of the sphere.
A uniform meter stick with a mass of 205 g is supported horizontally by two vertical strings, one at the 0 cm mark and the other at the 90 cm mark. what is tension on the string at the 0 cm mark and at the 90 cm mark.
A jet takes off from SFO to YUL. The distance between the airports is 4100 km. After a 1 hour layover, the jet returns to SFO. what is the average speed without the layover
What force (magnitude) does the spring exert on the object while it is a distance 2.90×10-2 below equilibrium position, moving upward.
Asteroid 433 Eros is one of the largest near-Earth asteroids. For purposes of this problem,assume it is spherical. What is the mass of Eros
The four tires of an automobile are inflated to a gauge pressure of 1.9 multiply.gif 105 Pa. Determine the weight of the automobile
A submerged scuba diver looks up toward the calm surface of a freshwater lake and notes that the Sun appears to be 32 degrees from the vertical. The diver's friend is standing on the shore of the lake.At what angle above the horizon does the friend s..
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