What must happen in order for water to change state?
a. it must maintain its thermal energy level.
b. it must absorb or release energy.
c. it must be insolated.
d. it must be convert thermal energy to solar energy.

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?