105 is a unique number that has been used in various contexts. In mathematics, it is the sum of the first 14 prime numbers, making it an interesting number to study. In other contexts, 105 may be used as a reference to a specific quantity or value, or it may have cultural or historical significance. Ultimately, the significance of 105 depends on the context in which it is being used. **

You will need a new cartridge that is compatible with the Dual 721 turntable. The original cartridge for the Dual 721 is the Shure M75-6, but since it may be difficult to find a new one, you can consider a suitable replacement such as the Audio-Technica AT95E or Ortofon 2M Red. These cartridges are known for their compatibility with the Dual 721 and will provide good sound quality for your turntable. Be sure to check the compatibility and installation instructions before purchasing a new cartridge for your Dual 721 turntable. **

To change a radiator thermostat without a union nut, you will need to first turn off the heating system and allow the radiator to cool down. Next, use an adjustable wrench to carefully unscrew the existing thermostat head from the valve body. Once removed, you can then install the new thermostat head by screwing it onto the valve body in a clockwise direction. Finally, turn the heating system back on and test the new thermostat to ensure it is working properly. **

Wrapping aluminum foil around the radiator thermostat is not recommended. The thermostat is designed to measure the temperature of the room and adjust the radiator accordingly. Wrapping it in aluminum foil can interfere with its ability to accurately sense the temperature, leading to inefficient heating and potential damage to the thermostat. It's best to leave the thermostat uncovered and unobstructed for proper functioning. **

I'm sorry, but I cannot determine if "Virus 105" is a specific virus without more information. If you suspect that your computer or device has been infected with a virus, it is important to run a reputable antivirus program to scan for and remove any potential threats. Additionally, it is important to keep your operating system and software up to date, use strong passwords, and be cautious of suspicious emails or websites to help prevent virus infections. **

The perception of temperature is influenced by the scale used to measure it. In the Fahrenheit scale, 105°F is closer to the upper end of the scale, which makes it sound hotter. On the other hand, in the Celsius scale, 40°C is not as close to the upper end of the scale, so it may not sound as extreme. Additionally, people in different regions may be more accustomed to using one scale over the other, which can also impact their perception of temperature. **

Trigonometry 105 is an advanced level course that builds upon the fundamental concepts of trigonometry. It covers more complex topics such as inverse trigonometric functions, trigonometric identities, and applications of trigonometry in real-world problems. Students in Trigonometry 105 will delve deeper into the relationships between angles and sides of triangles, as well as learn advanced techniques for solving trigonometric equations and proving trigonometric identities. Overall, Trigonometry 105 aims to provide a comprehensive understanding of trigonometry and its applications in various fields. **

It is generally considered healthy for adults to have a body temperature of 97-99 degrees Fahrenheit (36.1-37.2 degrees Celsius). A temperature of 105 degrees Fahrenheit (40.6 degrees Celsius) is considered very high and could indicate a serious medical condition such as heat stroke, severe infection, or other underlying health issues. It is important to seek medical attention immediately if you or someone else has a temperature of 105 degrees Fahrenheit. **