Based on the reading in “Heating Up” why is 30 ppm so significant? From the Reading in “Heating Up” who or what is responsible for the majority of CO2 being produced

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank