The melting points of two alloys used in formulating solder were investigated by melting 21 samples of each material. The researchers want to investigate the claim the claim that the alloys have different melting points. Assume that both populations are normally distributed and have the same standard deviation. What kind of hypothesis test should the researchers do

In which scenario is the least amount of work done on a crate? a force of 120 n moves it 25 m. a force of 115 n moves it 26 m. a force of 130 n moves it 22 m. a force of 125 n moves it 27 m.

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?

Like a key in a lock, the shape of the. must bind with the. of the recieving neuron