Recent content by sanphy

ya because problems always confuse and try to divert attention from actual meaning

genu. you did that correctly and I think that true also that Uf-Ui is the answer

HallsofIvy, actually i mean making an astronomical telescope(gazing planets and other constellations). Alseth advices for a reflective telescope, and I am very much acuainted with the Newtonian reflective telescopes , but the concave mirrors are not readily available here in INdia. I m thinking...

So may be i would go for a reflecting telescope,

how much magnifying power can I get, I want to a > 60X

I want to make an astronomical telescope, can anybody help. I need specifications for the lenses.

i want to make an astronomical telescope, can anybody help, give any specifications

thanks clem

Well this is indeed not a nuclear or particle physics question and is a mass-energy question. I tried to solve but the mass comes out as 2.67 * 10^11 kg. I think this could be correct.:approve::biggrin:

The question is: Ice at 0 degree C turns into Water at 0 degree C and thus gains 1 Kg of mass. What is the original mass of ice?