Seen from the northern latitudes (mid-northern hemisphere), the star Polaris
a. is never above the horizon during the day.
b. always sets directly in the west.
c. is always above the northern horizon.
d. is never visible during the winter.
e. is the brightest star in the sky.
C
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For a particular process involving seven variables or parameters having four fundamental dimensions, how many dimensionless numbers can be formed?
What will be an ideal response?
Force F is applied at D along line DB and couple M is perpendicular to plane ABC. Assume magnitudes F 5 20 lb and couple M 5 50 in-lb. The moment MA (in-lb) due to both F and M is:
(A) 37i – 60j 1 22k
(B) 237i – 60j – 22k
(C) 237i – 60j – 22k
(D) 260i – 37j – 22k
What is the ecliptic plane?
A) the plane of Earth's orbit around the Sun B) the plane of Earth's equator C) the plane of the Sun's equator D) the plane of the Milky Way Galaxy
Hayabusa was an example of which kind of mission?
A) lander B) flyby C) sample return D) orbiter