Not that long, use it as soon as you can. After maybe two hours it will be drier and sour.
it is in solid state
So long as it was kept at room temperature, it should be fine to eat after it was left out overnight.
Yes, temperature can affect the pH of lemon juice. As temperature increases, the chemical reactions in the lemon juice can be altered, which may change the pH level. Generally, warmer temperatures can decrease the pH of lemon juice.
I have no idea at all what your question means. Take a piece of iron and put it in a room whose temperature is 32 degrees, and before long the iron's temperature will be 32 degrees. Put a piece of iron into a room that is at 105 degrees, and before long the iron's temperature will be 105 degrees.
To make lemon water, squeeze fresh lemon juice into a glass of water and mix well. You can also add lemon slices for extra flavor. Enjoy it cold or at room temperature.
at room temperature about 4 hours
Butter can last for days at room temperature. But it is not recommended to leave it out for that long.
not too long
The temperature of the water will be the ambient (room) temperature. A broken piece of cutlery makes no difference to the temperature.
After an hour or so at room temperature, meat should be cooked.
Either it is at 390°C or at room temperature. It can't be both.
The gold will retain its original properties and characteristics when it solidifies at room temperature. It will form back into a solid piece of gold with the same purity and composition as before melting.