What is one way to describe elements
A . They are the building blocks of matter
B. They are the smallest pancies of any matere
C. They break down easile
D. They are the mostepensive materas on sen

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

The radius of an atom is closest in size to a

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?