Which low-mass star does not have fusion occurring in its central core?
A) a main-sequence star
B) a red giant
C) a helium-burning star
B
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For a polymer filament, the linear coefficient of thermal expansion would be expected to be _____________in the axial direction than in the transverse direction.
Fill in the blank(s) with the appropriate word(s).
Which are the most common stars, massive stars or low-mass stars (relative to the Sun)? High luminosity or low luminosity (relative to the Sun)?
What will be an ideal response?
A projectile is shot from the edge of a vertical cliff 60.0 m above the ocean. It has a speed of 100 m/s and is fired at an angle of 35.0° above the horizontal. How far from the foot of the vertical cliff does the projectile hit the water?
A) 126 m B) 312 m C) 684 m D) 1080 m E) 540 m
A radar pulse is bounced off the Moon at a distance of 400,000 km. What is the time from the transmitting of the pulse until its return?
a. 1.28 s c. 2.67 s b. 2.56 s d. 3.84 s