As the sun appears to travel along the ecliptic, its position relative to the celestial equator changes. the ecliptic crosses the celestial equator twice. these points are known as the equinoxes (vernal and autumnal). they occur twice a year, around march 21 and september 22, respectively. where on earth would you have to be for the sun to be directly overhead at noon on these dates?

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

answer: a. same unit

explanation:

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.