A Boeing-737 airliner has a mass of 20 500 kg. The total area of the wings is 105 m2 . What must be the pressure difference between the top and bottom of the wings to keep the airplane up?
a. 1.91E+3 Pa
b. 1.99E+1 Pa
c. 1.95E+2 Pa
d. 1.92E+3 Pa
e. 1.81E+3 Pa
a
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A displacement vector D is given as 40.0 m long at an angle of 60.0 degrees NORTH of EAST. The 
component and the 
component of the vector are
A. 
= +34.6 m,
= +20.0 m.
B. = +20.0 m,
= -34.6 m.
C. 
= -34.6 m,
= +20.0 m.
D. 
= -34.6 m, 
= +20.0 m.
E. 
= +34.6 m, 
= -20.0 m.
The Hubble time is:
A) the time remaining before the Universe stops expanding and begins to contract. B) the time it takes a galaxy moving at 1000 km/sec to move 1 Mpc. C) an estimate of the age of the Universe based on the Hubble constant. D) an estimate of the time it will take the Universe to double in size based on the Hubble constant.
The sensitive dependence upon initial conditions of the evolution of some physical systems is a feature of __________
Fill in the blank(s) with correct word
Halley's comet orbits the Sun approximately every 76 years, therefore it is a short-period comet.
Answer the following statement true (T) or false (F)