From the following which one is correct with respect to Bomb calorimeter? 1. Δ H < 0, W = 0
2. Δ U < 0, W = 0
3. Δ H = 0, W = 0
4. Δ U = 0, W = 0

And a) oxygen i believe

Fine out you self hx

Standing in the sunlight and feeling the heat on your face (uv radiation is entering the skin, converting to infrared radiation, and is absorbed by your tissues)orstanding near a fire and feeling the heat on your skin (infrared radiation transfer)