Related Questions

  1. Source S₁ is producing, 10¹⁵ photons per second of wavelength 5000Å
  2. A projectile is fired at an angle of 45° with the horizontal
  3. A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls
  4. A mixture consists of two radioactive materials A₁ and A₂ with half lives of 20s
  5. An explosion blows a rock into three parts. Two parts go off at right angles to each other