Some1 please help A motorcycle sounds its horn (the source) while moving from left to right. How

does the sound wave speed compare between X and Y?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

Why do metals "give up" their valence electrons?