What keeps the earth suspended in outer space?

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m