To calculate the heat needed to boil a pot of water at 100c, what do you need to know? a. the mass and latent heat of fusion b. the mass and amount of work done c. the mass and latent heat of vaporization d. the mass, temperature change, and specific heat capacity

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength