What small object is made of ice and dust?

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.

What body of water is the second cataract of the nile river submerged under

Solve for r in the formula v = ir, when i = 5 and v = 15.