Respiratory exchange ratio. The respiratory exchange ratio (RER) is the ratio between the amount of carbon dioxide (CO2) produced in metabolism and oxygen (O2) used.[1] Humans typically inhale more molecules of oxygen than they exhale of carbon dioxide because air contains much more oxygen by volume.
Jackson Hole Wyoming Weather & Seasons. 1  The busiest season in Jackson is the summer, particularly in July and August where visitors can enjoy temps between 70 and 90 degrees. September is still summery in temperature (besides cold nights), but is quieter. The fall months, October and November, are unpredictable.
Guide to Tennessee weather in July. The average maximum daytime temperature in Tennessee in July is a hot 32Â°C (90Â°F) with high heat & humidity. The average night-time temperature is usually a comfortable 20Â°C (68Â°F). There are usually 9 hours of bright sunshine each day, which represents 63% of the 14 hours of daylight.