Why material selection is important to design and manufacturing?​

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

Every winter i fly home to chicago. it takes 3 hours. what is my average speed?

When connected to a 120 v outlet, a light bulb consumed a power of 50.4 watts. what is the current flowing through it?