In coming to the conclusion that lightbeams are bent by gravity, Einstein reasoned that
A) increased mass at higher velocities causes increased gravitational effects, so lightbeams moving at lightspeed should have gravitational effects.
B) since all observers experience the same laws of physics, Newton's theory of gravity must apply to lightbeams.
C) since lightspeed is the same for all observers, moving observers would observe that lightbeams bend.
D) fast-moving observers would find that lightbeams bend, so gravity must also bend lightbeams.
E) accelerated observers would find that lightbeams bend, so gravity must also bend lightbeams.
E
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The sulfur hexafluoride molecule consists of one sulfur atom and six fluorine atoms. The atomic masses of sulfur and fluorine are 32.0 u and 19.0 u, respectively. One-half mole of this very heavy gas has what mass?
a. 32 g c. 146 g b. 73 g d. 608 g
A 0.28-kg stone you throw rises 34.3 m in the air. The impulse your hand receives from the stone while it throws the stone is
a. 2.7 Ns, up. b. 2.7 Ns, down. c. 7.3 Ns, up. d. 7.3 Ns, down. e. 9.6 Ns, up.
Saturn has a magnetic field whose strength is similar to the Earth's
Indicate whether the statement is true or false
Two people are balanced on a seesaw. If one person leans inward toward the center of the seesaw, that person's end of the seesaw tends to
A) rise. B) fall. C) stay at the same level. D) need more information