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Question: A 2.1-cm-diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks at an infrared wavelength of 2.2 µm.
A- How much power does the sphere radiate?
Can someone please explain what the heck is going on? Hint: Assume the metal sphere is a blackbody.
A student suspends two identical conductive spheres (m = 0.30g) from two equally long nylon threads each 25 cm long. What is the charge on each sphere
A parallel-plate vacuum capacitor has 9.20 J of energy stored in it. The separation among the plates is 2.90 mm. If the separation is decreased to 1.55 mm.
A wire lying along a y axis from y = 0 to y = 0.276 m carries a current of 1.62 mA in the negative direction of the axis. The wire fully lies in a nonuniform magnetic field given by = (0.466 T/m)y + (0.293 T/m)y. What is z components of the magnetic ..
A 3.16μF capacitator is chargedby a 13.0 V battery. It is disconnectedfrom the battery and then connected to an uncharged 3.58μF capacitator.
A resistor is made out of a long wire having a length L. Each end of the wire is attached to a terminal of a battery having a constant voltage Vo. A current I flows during the wire. If the wire were cut in half, making two wires of length L/2, and bo..
Ignore the force of gravity.
A tungsten wire has a radius of 0.065 mm and is heated from 20.0 to 1425 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1. When 190 V is applied across the ends of the hot wire, a current of 1.4 A is produced. How long is the w..
A rotating cylinder about 16 {rm km} long and 6.8 km in diameter is designed to be used as a space colony. With what angular speed should it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth.
If n=10, what is the largest value of the angular momentum l in this shell, How many electrons can be placed in this shell
A long straight wire is carrying a current of 2.4 A in a region where the magnetic field is perpendicular to the wire. If the magnetic field is 0.52 mT, what is the magnitude of the force on 3.0 m of the wire?
What must the charge (sign and magnitude) of a particle of mass 1.44g be for it to remain stationary when placed in a downward directed electric field of magnitude 660 N/C.
An airplane maintains a speed of 573 km/h relative to the air it is flying through as it makes a trip to a city 689 km away to the north. What time interval is required for the trip if the plane flies through a headwind blowing at 38.1 km/h toward t..
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