A 5450 m3 blimp circles Busch Stadium during the World Series, suspended in the earth’s 1.21 kg/m3 atmosphere. The density of the helium in the blimp is 0.178 kg/m3. a) What is the buoyant force that suspends the blimp in the air? b) How does this buoyant force compare to the blimp’s weight? c) How much weight, in addition to the helium, can the blimp carry and still continue to maintain a constant altitude?

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