Which of the following is a result of gravity counteracting outward pressure from burning hydrogen?
A
the spherical shape of stars
B
the beginning of nuclear fusion
с
the collapse of nebulas
D
the birth of a protostar

Which type of microscope would allow the viewer to see ribosomes inside a cell?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?