Posted by seema on Saturday, May 1, 2010 at 12:34pm.
Multiply the travel time by the speed of light and see which os the choices is closest.
You should have memorized the speed of light by now.
Related Questions
science - A space probe of the surface of Mars sends a radio signal back to the ...
physical science - How many hours are required for a radio signal from a space ...
Physics - A deep space probe moves away from the earth with a speed of 0.75c. An...
physics - A pulsar is a rapidly rotating neutron star that continuously emits a ...
Science - Why doesn't the space station fall toward the earth, instead of ...
physics - A 72.0 kg piece of a satellite left over from an explosion with zero ...
Physics - A pulsar is a rapidly rotating neutron star that continuously emits a ...
physics - A spacecraft circling the moon at a distance of 384,000 km from the ...
physics - A spacecraft circling the moon at a distance of 384,000 km from the ...
Physics - I'm having trouble with this question. Some __ objects emit no ...
For Further Reading