What is the correct order of densities from least to most?
a. supergiant, main sequence, white dwarf b. main sequence, white dwarf, supergiant
c. white dwarf, main sequence, giant d. main sequence, giant, supergiant
a
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How would sunspots appear if you could magically remove them from the Sun?
A) They would appear blue-white, like Sirius but brighter. B) Because sunspots are dark spots, they would be invisible against the blackness of space. C) They would shine bright orange in color, like Arcturus. D) They would not appear any differently than on the surface of the Sun. E) They would shine only with reflected sunlight, appearing similar to Venus.
Four identical particles (mass of each = 0.40 kg) are placed at the vertices of a rectangle (2.5 m × 4.0 m) and held in those positions by four light rods which form the sides of the rectangle. What is the moment of inertia of this rigid body about an axis that passes through the mid-points of the shorter sides and is parallel to the longer sides?
a. 2.2 kg/m2 b. 2.8 kg/m2 c. 2.5 kg/m2 d. 3.1 kg/m2 e. 1.6 kg/m2
Titan is smaller in mass and somewhat larger in size than the planet Mercury. How can Titan keep a substantial atmosphere while Mercury is virtually airless?
What will be an ideal response?
A person pushes horizontally on a heavy box and slides it across the level floor at constant velocity. The person pushes with a 60.0 N force for the first 6.88 m, at which time he begins to tire
The force he exerts then starts to decrease linearly from 60.0 N to 0.00 N across the remaining 6.88 m. How much total work did the person do on the box? A) 619 J B) 826 J C) 495 J D) 925 J