According to Einstein, gravity is
A) the bending of space that is caused by masses.
B) the force that masses exert on each other.
C) caused by the electromagnetic force.
D) due only to velocity.
E) due only to acceleration.
Question 2
A guitar-like stringed instrument has a string that is 16 cm long. It sounds the musical note A (440 Hz) when played without fingering. By what distance should you shorten it to play the note C (523 Hz)?
A) 1.7 cm B) 3.4 cm C) 2.5 cm D) 4.2 cm