Buy an air conditioner. Another way is to put fans in the room and get the air circulating
No, if you are not in the room you are just wasting electricity.
No. The heat that is generated by cooling the inside is usually given off at the back of the refrigerator. If you leave the door open then everything will become room temperature.
It depends on what the room is being used for in my opinion. You would need a huge air conditioning to cool off that big of a room and the air conditioning still might not cool the entire room.
You need to leave the room and let them cool off same with your brother
If you opened the refrigerator door a person can cool themselves off. It would not be energy efficient though to try to cool an entire room or house through use of a refrigerator. A refrigerator would not be capable of cooling that large of an area.
Cross ventilation can cool a room with no appliances.
leave it to cool in a cool room to about room temperature and then refridgerate.
No, air conditioners do not take in outside air to cool a room. They recirculate and cool the air that is already inside the room.
To turn off the radiator in your room, locate the valve on the side of the radiator and turn it clockwise until it is fully closed. This will stop the flow of hot water and the radiator will gradually cool down.
I would say yes if they are heavy enough.
No. While the air conditioner is on, keep the windows closed to keep the cool air from escaping to the outside.
No, a humidifier does not cool a room. It adds moisture to the air, which can make the room feel warmer and more comfortable, but it does not lower the temperature.