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

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

f is prop to m1xm2 double m1 double force

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it