1). Suppose you needed to raise a 250-kg mower a distance of 6.0 cm above the ground to change a tire. If you had a 2.0-m long lever. A. Where would you place the fulcrum if your force was limited to 300 N? distance from your hand to the fulcrum is: B. What is the Final Potential Energy of the Mower in Jouls? C. What is the total Work done by you in Joules? D. How much distance your hand had to move to raise the mower?

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?

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?