Which statement accurately describes mass-energy equivalence? it includes the idea that mass is a measure of the energy within an object.
it states that mass-energy can be created or destroyed.
it can be represented using the formula e = m2c.
it states that all energy in the universe will be converted to mass.

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.

Why do different substances have diffrent properties

How do you know how many valence electrons an atom has?