The Sun crosses the celestial equator going southward at the point called the _____
A) vernal equinox
B) winter solstice
C) summer solstice
D) autumnal equinox
D
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General Questions: A satellite is in orbit around the earth. Which one feels the greater force?
A. the satellite because the earth is so much more massive B. the earth because the satellite has so little mass C. Earth and the satellite feel exactly the same force. D. It depends on the distance of the satellite from Earth.
Elementary Particles: Elementary particles that experience the weak nuclear force but not the strong nuclear force are called
A. leptons. B. hadrons. C. mesons. D. bosons. E. baryons.
For general projectile motion, when the projectile is at the highest point of its trajectory
A) its acceleration is zero. B) its velocity is perpendicular to the acceleration. C) its velocity and acceleration are both zero. D) the horizontal component of its velocity is zero. E) the horizontal and vertical components of its velocity are zero.
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The quantity Fd is
a. the kinetic energy of the crate. b. the potential energy of the crate. c. the linear momentum of the crate. d. the work you do on the crate. e. the power you supply to the crate.