Which segments show changes of state that absorb heat? check all that apply
b-c
c-d
d-c
d-e
e-f
( this is the answer, i know i got it wrong)

Which statement correctly describes the relationship between frequency and wavelength?

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.

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?