Discover Questions

Compared to the Sun, a white dwarf star is
A.larger and hotter
B.smaller and hotter
C.larger and cooler
D.smaller and cooler? 2x-y=5 -4x+2y=-10
can someone explain why the answers are infinite? the final answer i got was 0/-8x but shouldn't x=0, not infinite? If all objects in a system have non-zero momentum then the system has a non-zero momentum? Why does Zinc reduce Cr3+ but not Mn3+? Astronomy question: When viewing Jupiter through my 4 inch refractor, the planet appears only as a huge bright blob. Any way I can dim it?