A dog whistle is typically silent to human ears because it produces sound at a frequency that is too high for us to hear. However, dogs have a much higher hearing range than humans, so they are able to hear the sound of a dog whistle. The sound produced by a dog whistle is usually around 23 to 54 kHz, which is well above the range of human hearing, making it extremely loud for dogs but inaudible to us. **

Titanium(IV) oxide, also known as titanium dioxide, is not a salt. It is a metal oxide compound, consisting of the elements titanium and oxygen. Salts are typically formed from the reaction of an acid and a base, while metal oxides are formed from the reaction of a metal with oxygen. Therefore, titanium(IV) oxide does not fit the definition of a salt. **

Survival shows can vary in their authenticity. Some shows, like "Survivorman" and "Alone," are known for their realistic portrayal of survival situations, with participants using genuine survival skills to endure in the wilderness. However, other shows may incorporate elements of scripting, staging, or assistance from the production crew to enhance the drama and entertainment value. It's important for viewers to research the specific show they are watching to understand the level of authenticity and manipulation involved. **

Yes, there are several popular survival TV series and movies that are worth watching. Some popular TV series include "Man vs. Wild," "Survivorman," and "Alone," which all follow individuals as they navigate and survive in various wilderness environments. As for movies, "Cast Away" starring Tom Hanks and "The Revenant" starring Leonardo DiCaprio are both gripping survival stories that are highly acclaimed. These shows and movies offer thrilling and intense survival scenarios that are sure to keep you on the edge of your seat. **

Yes, the titanium used in Eschenbach's Titanflex eyeglasses is real titanium. Eschenbach is known for using high-quality materials in their eyewear, and the Titanflex line specifically features frames made from a titanium alloy that is lightweight, durable, and flexible. This titanium alloy is designed to provide strength and flexibility, making it an ideal material for eyeglass frames. **

Yes, the titanium used in Eschenbach's Titanflex glasses is real titanium. Eschenbach is known for using high-quality materials in their eyewear, and the Titanflex collection specifically uses a titanium alloy that is lightweight, durable, and flexible. This titanium alloy is designed to provide strength and flexibility, making it an ideal material for eyeglass frames. **

I'm sorry, but as an AI text-based assistant, I am not capable of whistling. My primary function is to provide information and assistance through text-based communication. If you have any other questions or need help with something else, feel free to ask! **

The molar mass of titanium dioxide (TiO2) is 79.87 g/mol for titanium and 15.999 g/mol for oxygen. So, the molar mass of TiO2 is 79.87 + 2(15.999) = 79.87 + 31.998 = 111.868 g/mol. This means that 1000g of TiO2 contains 1000g / 111.868 g/mol = 8.93 moles of TiO2. Since there is one mole of titanium for every mole of TiO2, 8.93 moles of TiO2 will yield 8.93 moles of titanium. Therefore, 1000g of titanium dioxide will yield 8.93 moles * 79.87 g/mol = 712.5g of titanium. **