What produces the blueish haze in the middle of the Crab Nebula?
A.) It is primarily from emission lines of oxygen.
B.) It is produced by smashing streams of gas.
C.) It is produced by accelerated electrons.
D.) It is a condensing Hydrogen cloud.
E.) We don't know.
Ans: C.) It is produced by accelerated electrons.
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In projectile motion the velocity at the top of the trajectory is
A. zero B. non-zero, since the x component of the velocity has remained constant. C. larger than at any other time during the trajectory.
Any model of solar system formation must explain why terrestrial planets and jovian planets formed differently
Indicate whether the statement is true or false
Essentially, the Great Red Spot is
A) traveling north and south across Jupiter's face. B) composed primarily of iron oxide. C) a large cyclonic storm (hurricane). D) always located within 10 degrees of Jupiter's north pole. E) Neptune's largest atmospheric feature.
A projectile that is fired vertically at 8 km/s from Earth's surface will
A) go into circular orbit about Earth. B) rise and fall back to Earth's surface. C) follow an uncertain path. D) escape from Earth.