The Great Nebula in Orion, M-42, is a low-density cloud of hot gas. Use Kirchhoff's laws to describe its spectrum
What will be an ideal response?
Kirchhoff's second law notes that a hot thin gas will create an emission spectrum of bright lines through the spectroscope.
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Which of the following does NOT happen to any of the material in the protoplanetary disk?
A. it is sucked in to a black hole at the center of our Solar System B. it gets incorporated into the star at the center, the Sun C. it is accreted onto planets in the Solar System D. it first falls into small irregularities and later these clumps grow into larger structures E. it is blown out by the solar wind
The brakes in a car work because of __________ principle
Fill in the blank(s) with correct word
Light from inside a raindrop that exits into the air
A) slows down. B) remains at speed c. C) speeds up. D) none of the above
A hollow cylindrical (inner radius = 1.0 mm, outer radius = 3.0 mm) conductor carries a current of 80 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 2.0 mm from the axis of the conductor
a. 8.0 mT b. 3.0 mT c. 5.3 mT d. 16 mT e. 1.2 mT