The mass enclosed in any orbit can be estimated from the equation M(
A) The mass is distributed like a doughnut, with a hole in the center.
B) The mass is concentrated in the center.
C) The mass is spread out over large radius.
D) Cannot be determined from the information given.
C
Physics & Space Science
A) The mass is distributed like a doughnut, with a hole in the center.
B) The mass is concentrated in the center.
C) The mass is spread out over large radius.
D) Cannot be determined from the information given.
C
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The term "cosmic distance ladder" refers to the fact(s) that:
Select the ones that apply: a. change in apparent position of object on sky through Earths orbit, which gives a measure of distance. (p=1/D) b. Spectral classification of star, which gives luminosity.D*=Sq rt L/4pieB c. variable stars whose luminosity is related to their period.D*=Sq rt L/4pieB d. relation between a galaxy's rotation rate and luminosity. D*=Sq Rt Lg/4pieBg e. Exploding star whose luminosity can be determined by its light curve. Dg=SqRt Lsn/4pieBsn f. Relation between galaxies recession velocity and distance.D=V/H g. All of the above facts.
If we say that a material is opaque to ultraviolet light, we mean that it ________
A) emits ultraviolet light B) absorbs ultraviolet light C) reflects ultraviolet light D) transmits ultraviolet light
Jupiter is noticeably oblate because:
A) it has a strong magnetic field. B) it has such powerful gravity. C) it rotates rapidly. D) it undergoes a gravitational attraction from each of its various moons. E) it has a mantle of liquid metallic hydrogen.
If the position versus time graph of an object is a vertical line, the object is
A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. E) none of the above