If the date is April 21, what zodiac constellation will you see setting in the west shortly after sunset?
A) Scorpius
B) Pisces
C) Taurus
D) Virgo
C) Taurus
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A lunar eclipse occurs when the
A) Sun passes into Earth's shadow. B) Moon passes into Earth's shadow. C) Earth passes into the Sun's shadow. D) Earth passes into the Moon's shadow.
Which of the following was not observed by Galileo?
A) phases of Venus B) four moons orbiting Jupiter C) stellar parallax D) mountains and valleys on the Moon
Why does quartz sandstone have a high porosity and a high permeability?
What will be an ideal response?
A point charge Q is placed on the x axis at x = 2.0 m. A second point charge, ?Q, is placed at x = 3.0 m. If Q = 40 ?C, what is the magnitude of the electrostatic force on a 30-?C charge placed at the origin?
A. 7.2 N B. 3.9 N C. 1.5 N D. 14 N E. 8.1 N