Does tire pressure have an effect on gas mileage? Your manual for your car recommends your tires to have a tire pressure of 22 psi. You design an experiment to see is tire pressure affects gas mileage. You fill your car up with gas, check the tire pressure to make sure it is at 22 psi, reset the odometer trip to “zero”, and drive your car until your tank of gas is empty. To have an accurate reading, you check your tire pressure every 2 days. Once the first tank of gas is emptied, you fill your car up again with the same gas from the same gas station. You now increase your tire pressure to 32 psi, reset the odometer trip to “zero”, and drive your car until your tank of gas is empty. To have an accurate reading, you check your tire pressure every 2 days. Once the second tank of gas is emptied, you fill your car up again with the same gas from the same gas station. You now decrease your tire pressure to 15 psi, reset the odometer trip to “zero”, and drive your car until your tank of gas is empty. To have an accurate reading, you check your tire pressure every 2 days. 10. Refer to the experiment described above. The dependent variable in this experiment is...

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.