A projectile that is fired vertically at 11.2 km/s from Earth's surface will
A. escape from Earth.
B. go into circular orbit about Earth.
C. rise and fall back to Earth's surface.
D. follow an uncertain path.
Answer: A
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A. 8 km/h. B. 4 km/h. C. more than 8 km/h. D. 6 km/h.
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Indicate whether the statement is true or false
Secondary structure is associated with which of the following?
A) the sequence of amino acids B) hydrogen bonding within the backbone C) hydrogen bonding between the side chains D) the interaction of protein subunits