Give a definition for density, and provide the SI units for it. Make a prediction about the approximate weight (in Newtons) of the air in the room you are currently occupying by taking the following steps: Measure the dimensions of the room in ft. Calculate the volume of this space and convert it in cubic meters. Use the density of air at sea level (1.225 kg/m3 ) and calculate the mass of the air in the space. Multiply your calculated mass by the acceleration due to gravity to find the weight in Newtons (N). Include your calculations and answer the question How does the result compare to your predicted weight