A turntable has a moment of inertia of 3.00 × 10^?2 kg·m2 and spins freely on a frictionless bearing at 25.0 rev/min. A 0.600-kg ball of putty is dropped vertically onto the turntable and sticks at a point 0.100 m from the center. What is the new rate of rotation of the system?
a. 20.8 rev/min b. 22.7 rev/min
c. 33.3 rev/min d. 27.2 rev/min
a
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Many young stars in new clusters appear to be surrounded by a blue, nebulous haze. The physical process that produces this blue nebulosity is
a. mission from transitions in hydrogen atoms, predominantly in the blue part of the visible spectrum. b. the preferential scattering of blue starlight by very fine dust grains in the interstellar medium. c. emission from molecular species, particularly methane, CH4, whose emission bands are in the blue part of the visible spectrum. d. thermal (blackbody) emission from interstellar gas heated to 10,000 K by UV radiation from nearby hot, young stars
The magnetic flux through a loop perpendicular to a uniform magnetic field will change
a. if the loop is replaced by two loops, each of which has half of the area of the original loop. b. if the loop moves at constant velocity while remaining perpendicular to and within the uniform magnetic field. c. if the loop moves at constant velocity in a direction parallel to the axis of the loop while remaining in the uniform magnetic field. d. if the loop is rotated through 180 degrees about an axis through its center and in the plane of the loop. e. in none of the above cases.
The clouds on Venus are made primarily of ________
Fill in the blank(s) with correct word
The two types of bright nebulae are emission nebulae and ______________ nebulae
Fill in the blank(s) with correct word