Acid is not transparent. In its liquid form, acids are typically colorless or have a slightly yellowish tint. However, they are not transparent as they can be seen and have a distinct appearance. Additionally, some acids can emit fumes or have a cloudy appearance, further indicating that they are not transparent. **

To make a transparent silicone case transparent again, you can try cleaning it with a mild soap and water solution. Gently scrub the case with a soft cloth or sponge to remove any dirt or residue that may be causing it to appear cloudy. If the case is still not clear, you can try using a small amount of rubbing alcohol or vinegar to help restore its transparency. Additionally, you can also try using a silicone polish or protector specifically designed for clear silicone products to bring back its original shine. **

To make a transparent silicone case transparent again, you can try cleaning it with a mild soap and water solution. Gently scrub the case with a soft cloth or sponge to remove any dirt or grime that may be causing it to appear cloudy. If the case is still not clear, you can try using a small amount of rubbing alcohol on a cloth to wipe away any stubborn residue. Additionally, you can try using a silicone polish or protector to restore the transparency of the case. **

The two transparent white fast shapes in the sky are likely to be clouds and contrails. Clouds are formed from condensed water vapor in the atmosphere and can appear as white, fluffy shapes moving quickly across the sky. Contrails, on the other hand, are formed from the water vapor in aircraft exhaust and can also appear as thin, white lines moving rapidly through the sky. Both of these phenomena are common sights in the sky and can create the illusion of fast-moving, transparent white shapes. **

The two transparent white fast figures in the sky are likely clouds and airplanes. Clouds are made up of water droplets or ice crystals suspended in the atmosphere, appearing white due to the way they scatter sunlight. Airplanes, on the other hand, are man-made flying vehicles that can appear as fast-moving white figures in the sky due to their altitude and speed. Both clouds and airplanes are common sights in the sky and can be easily mistaken for each other due to their appearance. **

To convert transparent TIFF files to transparent PNG files, you can use image editing software such as Adobe Photoshop or GIMP. Open the TIFF file in the software, then save or export the file as a PNG with the transparency option enabled. This will preserve the transparency of the original TIFF file in the PNG format. Additionally, there are online tools and converters available that can also help with this conversion process. **

Yes, there is transparent metal. One example is aluminum oxynitride, also known as ALON, which is a transparent ceramic material that has the strength of metal. ALON is used in military applications such as bulletproof glass and armor due to its transparency and durability. While it is not a traditional metal, ALON demonstrates that transparent materials with metal-like properties can be created. **

Transparent spheres are three-dimensional objects that are completely see-through, allowing light to pass through them without distortion. They are typically made of materials such as glass or plastic that have high transparency, giving them a clear and smooth appearance. Transparent spheres are often used in various applications such as decorative ornaments, scientific instruments, and optical lenses due to their ability to transmit light effectively. **