Atest tube containing 35.5 g of lead shot (pb) is placed into a beaker containing deionized water(di h2o) at 25 degrees celsius. the test tube is removed 15 minutes after the water in the beaker has reached its boiling point (210 degrees fahrenheit). the lead is then gently transferred to a coffe-cup calorimeter containing 50.0g of di h2o at 22 degrees celsius. the temperature is observed to be 65.4 degrees celsius. determine the specific heat of lead and calculate the percent error

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference