Explain why a high-mass star has a much shorter lifespan than a low-mass star despite the fact that a high-mass star has much more hydrogen (fuel) to burn. Don't forget that an explanation
needs to answer how and whí, something happens. Be sure to include the following in your
explanation:
a. How gravity leads to nuclear fusion
b. How the rate of fusion in a high mass star compares to the rate of fusion in a low mass
star
c. Why a high-mass star has a much shorter lifespan than a low-mass star despite the fact
that a high-mass star has much more hydrogen (fuel) to burn

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .