Observer A sees a ruler moving by in a relativistic rocket and measures its length to be LA. Observer B moves along with the rocket and measures the length of the ruler to be LB. What is true about these two length measurements?
A) LA > LB
B) LA = LB
C) LA < LB
D) LA could be greater or smaller than LB depending on the direction of the motion.
C
You might also like to view...
Intensity: A radio transmitter is operating at an average power of 4.00 kW and is radiating uniformly in all directions. What is the average intensity of the signal 8.00 km from the transmitter?
A. 4.97 ?W/m2 B. 2.49 ?W/m2 C. 0.00497 W/m2 D. 0.00249 W/m2
When observing a star that increases dramatically in brightness, if a plateau is observed in the light curve during the declining phase, the event is probably:
A) a nova. B) a type I supernova. C) a type II supernova. D) fusion in an accretion disk around a white dwarf. E) fusion in an accretion disk around a neutron star.
A(n) ______________ is any circle on the surface of a sphere whose center is at the center of the sphere
Fill in the blank(s) with correct word
The reverse of the respiration reaction is the reaction known as
A) combustion. B) oxidation. C) photo-synthesis. D) inhaling. E) exhaling.