Is it possible under the optimal conditions to get lighting or electricity in general to approach the speed of light even in theory? If so what exactly would happen?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

Which component of the earth’s atmosphere is decreased due to photosynthesis?