A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest on Earth
A) the light will reach the front of the rocket at the same instant that it reaches the back of the rocket.
B) the light will reach the front of the rocket before it reaches the back of the rocket.
C) the light will reach the front of the rocket after it reaches the back of the rocket.
C
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The last fusion product possible in stars is ________ because ________.
A. carbon; no stars are hot enough in their cores to fuse carbon nuclei B. iron; no stars are hot enough in their cores to fuse iron nuclei C. iron, fusing iron nuclei absorbs energy; it does not liberate it D. lead, fusing lead nuclei absorbs energy; it does not liberate it
A 100-kW radio station emits EM waves in all directions from an antenna on top of a mountain. What is the intensity of the signal at a distance of 10 km?
A. 8 × 10?5 W/m2 B. 8 × 10?6 W/m2 C. 3 × 10?3 W/m2 D. 0.8 W/m2 E. 2.5 × 10?5 W/m2
The angular measurement in hours, minutes, and seconds from the celestial prime meridian eastward is called ______________
Fill in the blank(s) with correct word
If the net work done on a certain object is zero, make a statement concerning its speed?
What will be an ideal response?