Problem a spherical hot air balloon is neutrally buoyant in, Ask an Expert

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Problem: A spherical hot air balloon is neutrally buoyant in air at an ambient temperature of 0 degrees Celsius with a load of 500 kg. The mass of the balloon and all connective gear is an additional 100 kg. The radius of the balloon is 10.0 m.

Part A: What is the temperature of the air inside the balloon?

I need help to find the temperature of the air inside the balloon.

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