What does physical features mean

Japan is a group of four islands off the coast of asia. what effect do you think has had on the lives of the japanese?

What is the mercury length of time for one revolution around the sun?

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.