1]What do u mean by:

Philosopher's wool
2]what will happen if door of refrigerator is open
3]How can we increase life of Daniel cell?

1. I never heard of it but according to this dictionary link it is zinc oxide.

http://www.ask.com/dic?q=philosophers'+wool&o=0&l=dir&page=1

2. The refrigerator will get warm. The electric bill will increase because the refrig will run longer. Surely you ask in jest.

3. Less current can be drawn from the cell is one way. Another is to increase the concentrations of the solutions.

1] Philosopher's wool refers to a substance known as zinc oxide or zinc white. It is a fine white powder that is used in various applications, such as in the production of ceramics, paints, and cosmetics. The name "Philosopher's wool" is derived from the ancient belief that philosophers could turn base metals into gold, and zinc oxide's white appearance resembles wool.

To get more detailed information about Philosopher's wool, you can search for it on reputable websites, such as scientific journals, encyclopedia articles, or chemistry-related websites. These sources will provide you with a comprehensive explanation of what Philosopher's wool is, its characteristics, and its applications.

2] If the door of a refrigerator is left open, several things can happen:

a) Increase in energy consumption: Refrigerators are designed to maintain a cool internal temperature. When the door is open, warm air from the room enters the refrigerator, causing the internal temperature to rise. As a result, the refrigerator needs to work harder to bring the temperature back down, leading to increased energy consumption.

b) Food spoilage: When the refrigerator door is open, the cold air inside escapes, and the temperature rises. This can cause perishable food items like fruits, vegetables, and dairy products to spoil more quickly as they are exposed to warmer temperatures.

c) Freezer malfunction: If you have a separate freezer compartment in your refrigerator, leaving the door open can cause the freezer to overwork and potentially malfunction. This can result in the food stored in the freezer thawing, leading to wastage.

To avoid these issues, always make sure to close the refrigerator door tightly after use.

3] To increase the lifespan of a Daniel cell (also known as a Daniell cell), which is an early type of electric battery, there are a few steps you can take:

a) Proper maintenance: Regularly check and clean the electrodes and the electrolyte solution. Clean any corrosion from the electrodes using appropriate cleaning agents or gently scrub them with a brush.

b) Electrolyte concentration: Ensure that the concentration of the electrolyte solution is within the recommended range. This can help maintain the proper chemical reactions within the cell and prevent degradation.

c) Temperature control: Avoid exposing the Daniel cell to extreme temperatures. High temperatures can accelerate chemical reactions, leading to faster degradation. Similarly, freezing temperatures can affect the cell's performance.

d) Usage patterns: Avoid excessive and prolonged discharge of the battery. If possible, charge the battery before it fully discharges.

By following these steps, you can help extend the life of a Daniel cell. Additionally, consulting specific literature or resources on electrochemistry can provide you with more in-depth information on the topic.