Why did it take astronomers until 1995 to discover the first exoplanet orbiting another star like the sun?

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

Which two particles are found in the center of an atom

Of is j/kg·k. if a 2.6 kg of isk to k, is ?