The measure of the position of the sun from the horizontal is called the ________
a. altitude b. azimuth c. declination d. insolation
a
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Projectile Motion: A plane flying horizontally at a speed of 50 m/s and at an elevation of 160 m drops a package, and 2.0 s later it drops a second package. How far apart will the two packages land on the ground if air resistance is negligible?
A. 100 m B. 160 m C. 180 m D. 320 m
Which Galilean moons of Jupiter show evidence for subsurface oceans of water beneath their icy crusts?
A) Europa and Ganymede B) all four show evidence for subsurface oceans C) Europa D) Europa, Ganymede, and Callisto
The energy level diagram for hydrogen
The smallest energy of an absorbed photon that will raise a hydrogen atom from its ground state to its first excited state is
a.
1.5 eV.
b.
1.9 eV.
c.
3.4 eV.
d.
10.2 eV.
e.
13.6 eV.
If two straight lines start out parallel but eventually cross, then they must be in a
A) spherical geometry. B) flat geometry. C) saddle-shaped geometry. D) spacetime geometry.