Rock B has a mass of 100 kg and is travelling at 7 m/s in the same direction as rock A. Rock B has a momentum of 700 kg m/s. Rock A and rock B collide and join together.

Calculate the velocity of the two rocks after the collision.

Show your working.
Please help me sooon

The object's initial distance above the groundthe object's initial velocity

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.

Iwould think it is temperature, silica, oxides (gases)