How could the student estimate the average speed in the first 8 hours

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?

An uplifted block of rock between two normal faults

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?