Dark matter does not affect galaxy collisions
Indicate whether the statement is true or false
FALSE
You might also like to view...
According to our theory of solar system formation, why do all the planets orbit the Sun in the same direction and in nearly the same plane?
A) The laws of conservation of energy and conservation of angular momentum ensure that any rotating, collapsing cloud will end up as a spinning disk. B) The original solar nebula happened to be disk-shaped by chance. C) Any planets that once orbited in the opposite direction or a different plane were ejected from the solar system. D) Luck explains it, as we would expect that most other solar systems would not have all their planets orbiting in such a pattern. E) The Sun formed first, and as it grew in size it spread into a disk, rather like the way a ball of dough can be flattened into a pizza by spinning it.
An object moves 10 m east in 30 s and then returns to its starting point taking an additional 50 s. If west is chosen as the positive direction, what is the sign associated with the average velocity of the object?
a. + b. ? c. 0 (no sign) d. any of the above
What can contribute to a planet losing its atmosphere?
A) thermal escape B) large impacts C) solar wind stripping D) all of these
A ray of light in air enters a glass surface at right angles to the surface. What is the angle of refraction?
A) 90° B) 180° C) 270° D) 360° E) 0°