Which of the following statements is FALSE?
A) In our universe, at earlier times, everything was closer together.
B) The universe is expanding.
C) For an observer located in a galaxy all other distant galaxies would appear to move away from his.
D) The universe looks the same in all directions; i.e. it is homogeneous and isotropic.
E) We are at the center of the universe.
Ans: E) We are at the center of the universe.
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A 10.0-kg rod has a Varying linear density that is symmetric about the midpoint of the rod. The moment of inertia about an axis perpendicular to the rod that passes through the rod 30.0 cm from its midpoint is 5.00 kg?m2
What is the moment of inertia about an axis perpendicular to the rod that passes through the rod 20.0 cm from its midpoint? A) 7.50 kg?m2 B) 4.50 kg?m2 C) 5.10 kg?m2 D) 4.90 kg?m2 E) Answer depends on whether the new axis is on the same side of the midpoint as the 30.0 cm distant axis or if its on the opposite side of the midpoint.
Kirchhoff's Rules: For the circuit shown in the figure, calculate the emf's ?1 and ?3, assuming that the batteries are ideal. Note that two currents are shown.
Fill in the blank(s) with the appropriate word(s).
Why do we think there is a lot of dark matter in clusters of galaxies?
A.) Individual galaxies are moving so fast that they could not be held together by the gravity of visible matter. B.) We've detected some of it with dark matter telescopes. C.) Gravitational lensing lets us measure mass even when we can't see it. D.) A, B, and C. E.) A and C.
Venus has a thicker atmosphere than Earth
Indicate whether the statement is true or false