Population II stars I. are primarily found in the disk of the galaxy. II. contain more heavy metals than population I stars. III. are primarily old low mass stars. IV. are located in globular clusters
a. III & IV
b. I & II
c. II
d. IV
e. I, II, & III
A
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At what two celestial locations do the celestial equator and ecliptic coincide?
a. winter solstice and summer solstice b. vernal equinox and autumnal equinox c. they coincide at all points because they are the same. d. north celestial pole and south celestial pole e. zenith and east point
A copper bar (d 5 10 mm, E 5 110 GPa) is loaded by tensile load P 5 11.5 kN. The maximum shear stress in the bar is approximately:
(A) 73 MPa
(B) 87 MPa
(C) 145 MPa
(D) 150 MPa
A resistor and an inductor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the resistor is
A) greater than the battery's terminal voltage. B) equal to the battery's terminal voltage. C) less than the battery's terminal voltage, but not zero. D) zero. E) equal to the voltage across the inductor.
A 5 kg ball collides head-on with a 10 kg ball, which is initially stationary. The collision is inelastic. Which statement is true?
A) The magnitude of the change of velocity the 5 kg ball experiences is greater than that of the 10 kg ball. B) The magnitude of the change of velocity the 5 kg ball experiences is less than that of the 10 kg ball. C) The magnitude of the change of velocity the 5 kg ball experiences is equal to that of the 10 kg ball. D) The magnitude of the change of the momentum of the 5 kg ball is equal to the magnitude of the change of momentum of the 10 kg ball. E) Two of the above statements are true.