A(n) _________ is a collection of 10^5 to 10^6 stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than 10^9 years old and mostly yellow and red stars
a. Herbig-Haro object
b. globular cluster
c. open cluster
d. giant cluster
e. supernova
b
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The wobble of Earth's rotational axis resulting in a change in location of the north celestial pole is called ________.
A. the Coriolis effect B. differentiation C. revolution D. deflection E. precession
An electric field makes a charged particle accelerate but a magnetic field takes it around in a circle
Indicate whether the statement is true or false
An uncharged spherical conducting shell surrounds a charge ?q at the center of the shell. Then charge +3q is placed on the outside of the shell. When static equilibrium is reached, the charges on the inner and outer surfaces of the shell are, respectively,
a. +q, ?q. b. ?q, +q. c. +q, +2q. d. +2q, +q. e. +3q, 0.
Multiple-Object Accelerating Systems: A locomotive is pulling three train cars along a level track with a force of 100,000 N. The car next to the locomotive has a mass of 80,000 kg, the next one, 50,000 kg, and the last one, 70,000 kg. You can neglect the friction on the cars being pulled.(a) What is the magnitude of the force between that the 80,000-kg car exerts on the 50,000-kg car?(b) What is the magnitude of the force that the 50,000-kg car exerts on the 70,000-kg car?
What will be an ideal response?