Compared with stars in the disk, orbits of stars in the halo
A) are relatively uniform to each other.
B) are elliptical, with random orientation.
C) are elliptical but orbiting in the same direction.
D) do not have to be around the galactic center.
E) do not have to pass through the plane of the galaxy.
B
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Daisy raises 10.Kg to a height of 2.5 meters in 2.0 seconds
(a) How much work did she do? (b) How much power was expended? (c) If she raises it in 1.0 s rather than 2.0 s, how do the work and power change?
What is the impedance of an AC series circuit that is constructed of a 12.5-? resistor along with 13.6-? inductive reactance and 3.43-? capacitive reactance?
a. 29.5 ? b. 22.7 ? c. 18.2 ? d. 16.1 ? e. 3.36 ?
A baseball catcher throws a ball vertically upward and catches it in the same spot when it returns to his mitt. At what point in the ball's path does it experience zero velocity and non-zero acceleration at the same time?
a. midway on the way up b. at the top of its trajectory c. the instant it leaves the catcher's hand d. the instant before it arrives in the catcher's mitt
Why aren't the three readings for background radiation in Procedure 1 identical?