Atmospheric pressure is 1.0 × 10^5 N/m2, and the density of air is 1.29 kg/m3 . If the density of air is constant as you get higher and higher, calculate the height of the atmosphere needed to produce this pressure
a. 7900 m
c. 1260 m
b. 77,000 m
d. 10,300 m
A
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Answer the following statement(s) true (T) or false (F)
1. Consider two q-vectors 
with possibly complex components. Their inner product 
is a real number.
2. The inner product of a vector with itself 
is a real number.
3. Consider two q-vectors 
with possibly complex components. Their inner product 
obeys the relation = 
4. Even though the observable Sy can only have the values 
, the expectation value 
can have any value between these two extremes.
Pulsar planets are _____
a. huge gas planets that could be classified as brown dwarfs b. asteroids captured from interstellar space c. observed, but not fully understood d. predicted, but have not been observed e. Earth-like, and may harbor life
A block of mass M slides down a frictionless plane inclined at an angle ? with the horizontal. The normal reaction force exerted by the plane on the block is directed
A) parallel to the plane in the same direction as the movement of the block. B) parallel to the plane in the opposite direction as the movement of the block C) perpendicular to the plane. D) toward the center of the Earth. E) toward the center of mass of the block.
An oak tree was planted ago. How many seconds does this correspond to? (Do not take leap days into account.)
A) 6.9 × 108 B) 1.2 × 107 C) 2.9 × 107 D) 2.8 × 108