Discover Questions

How does object approaching speed of light affect spacetime? What is the contrapositive for the following statement? A∩Bc=∅ if A⊆B. Bc = B complement? Find values of x for which 4x^4+12x^3-19x^2+8x-1>=0
2.solve z-x-y=6 x^2+y^2+z^2=14 z^3-x^3-y^3=36 for values of x,y,z(unique soln)? The Hubble Space Telescope orbits Earth 613 km above Earth's surface. What is the period of the telescope's orbit? If space of the Universe is considered a vacuum how could it expand would it be most likely that its galactic expansion as gravity changes?