Acompany that is concerned about the environment wants to encourage the use of their fuel cell cars, so they are putting together information to sell the cars. they want to be sure their material is accurate. which piece of information is true about fuel cell cars? fuel cell cars are cheaper to buy. fuel cell cars reduce use of non-renewable fossil fuels fuel cell cars are more powerful than gasoline-powered vehicles. fuel cell cars allow for the safe storage of hydrogen gas at filling stations

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light