According to Einstein's equivalence principle, which of the following cannot be distinguished from a system accelerating with uniform acceleration in the presence of no gravity by any measurement within the system?
A)
a system moving with constant velocity in the presence of no gravitational force
B)
a system that only contains massless objects
C)
a system that is not accelerating, but is subject to a uniform gravitational acceleration
D)
a system that is moving at the speed of light
E)
a system in free fall
Question 2
Three identical resistors are connected in series to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the resistors?
A)
12 A
B)
4 A
C)
36 A
D)
24 A
E)
zero
Principle of Progression
Basic principle of target-probe hybridization in microarray chips.
Gestalt Principle: Proximity
Gestalt Principle: Similarity
Einstein telescope
Einstein telescope