Final answer:
In a hypothetical world where the speed of light is 3000 m/s, a jet moving toward a target at 800 m/s firing bullets at a muzzle velocity of 1000 m/s would result in the bullets moving at a velocity of 1800 m/s relative to the target. However, relativistic effects could significantly impact this calculation if they were applicable. If the speed of light were so low, we would observe relativistic effects in everyday life, such as time dilation and length contraction at common speeds.
Step-by-step explanation:
If we suppose the speed of light were only 3000 m/s and a jet fighter moving toward a target on the ground at 800 m/s shoots bullets with a muzzle velocity of 1000 m/s, we would simply add the two velocities together in this hypothetical non-relativistic scenario. This means the bullets' velocity relative to the target would be 1800 m/s (800 m/s + 1000 m/s = 1800 m/s). However, this question implies a world where the speed of light is much lower than it actually is, which would mean that we might have to consider relativistic effects for such high velocities relative to this new speed of light. In that case, velocities don't just add up linearly. But if we ignore any relativistic effects, the bullets would move faster than their muzzle velocity relative to the jet.
As for the observation of relativistic effects in everyday life, if the speed of light were 3000 m/s, you would indeed see such effects. For instance, significant time dilation and length contraction would occur at speeds we encounter in everyday life, such as cars driving on a highway.