Many sailboats are moored at a marina 4.4 km away on the opposite side of a lake. you stare at one of the sailboats because, when you are lying flat at the water's edge, you can just see its deck but none of the side of the sailboat. you then go to that sailboat on the other side of the lake and measure that the deck is 1.5 m above the level of the water.

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

so easy. just google the electromagnetic waves and it’ll pop up.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.