In 1960, ______________ proposed the concept of seafloor spreading
Fill in the blank(s) with correct word
Harry Hess
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A waiter fills your water glass with ice water (containing many ice cubes) such that the liquid water is perfectly level with the rim of the glass. As the ice melts,
A) the liquid-water level decreases. B) the liquid-water level remains flush with the rim of the glass. C) the liquid water level rises, causing water to run down the outside of the glass.
A(n) ____________________ is used to measure the brightness and color of stars
Fill in the blank(s) with correct word
Most spiral galaxies have rotation curves that
A) decrease rapidly with increasing radius in the disk, indicating no dark matter is present. B) increase drastically with increasing radius. C) decrease rapidly with increasing radius in the disk, indicating the presence of dark matter. D) stay constant out to large radii in the disk, indicating that no dark matter is present. E) stay constant out to large radii in the disk, indicating the presence of dark matter.
A 60. kg person walks along a 100. kg log at the rate of 0.8 m/s (with respect to the log). With what speed does the log move, with respect to the shore?
What will be an ideal response?