Ahelium balloon with a volume of 2.75 l and pressure of 1.04 atm and 27 °c flies in the sky and reaches an altitude where the temperature is -15 °c and the pressure is 0.530 atm. calculate the final volume of the balloon

Explanation for basic character?

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

Which metals are called noble metals