Example of items that changed chemically

On a cold day, when the air temperature is 0°c, you empty your lungs and take a deep breath, filling your lungs with 4.2 l of air. if you hold your breath until the temperature of the air in your lungs reaches 37°c, what is the volume of the air in your lungs at that point, assuming the pressure does not change?

What is the final velocity of the initial velocity of 25 and -50?

Identify some abiotic characteristics of the tundra biome.