A toy balloon has an internal pressure of 1.25 atm and a volume of 4.0 L. If the temperature where the balloon is released is 100 C, what will happen to the volume when the balloon rises to an altitude where the pressure is 0.85 atm and the temperature is –250 C?

Naoki's bicycle has a mass of 10 kg. if naoki sits on her bicycle and starts pedaling with a force of 168 n, causing an acceleration of 2.8 m/s2, what is naoki's mass?

Can someone me with these questions plz.

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's