Yes, it is bad if the chain of the rack and pinion is broken. The rack and pinion system is crucial for steering in a vehicle, and if the chain is broken, it can lead to loss of control and unsafe driving conditions. It can also cause difficulty in steering and make it hard to turn the vehicle. It is important to have the chain of the rack and pinion system repaired or replaced as soon as possible to ensure safe and efficient driving. **

The chain 12 refers to a specific length of crochet chain made by creating 12 chain stitches. In crochet, the chain stitch is the foundation for many patterns and is used to create the initial row of stitches. The chain 12 can be used as the starting point for various crochet projects, such as creating a foundation for a scarf, blanket, or other items. It is a basic building block in crochet and is often used as the starting point for creating larger pieces. **

To calculate the pitch circle diameter of the pinion, you need to know the number of teeth on the pinion, the module (which is the ratio of the pitch circle diameter to the number of teeth), and the pressure angle. The formula to calculate the pitch circle diameter is Pitch Circle Diameter = Module x Number of Teeth. By plugging in the values of the module and the number of teeth into this formula, you can determine the pitch circle diameter of the pinion. **

To calculate the force of a rack and pinion system, you need to consider the torque applied to the pinion gear and the radius of the gear. The force can be calculated by dividing the torque applied to the pinion gear by the radius of the gear. This will give you the force exerted on the rack. Additionally, you can also consider the efficiency of the system to determine the actual force output. **

The pinion gear of an RC car is typically smaller than the spur gear. The pinion gear is the smaller gear that is attached to the motor shaft, while the spur gear is the larger gear that it meshes with. The size difference between the two gears allows for the transmission of power and speed from the motor to the wheels of the RC car. **

Streaming 12 refers to streaming content at a resolution of 1080p or Full HD. This means that the video quality is high definition, providing a clear and detailed viewing experience. Streaming at this resolution requires a stable internet connection to ensure smooth playback without buffering or interruptions. **

The price of a used 750 gold chain weighing 12 grams can vary depending on factors such as the current market price of gold, the design and craftsmanship of the chain, and the condition of the piece. As of [current date], the market price of 750 gold is [current price per gram]. A fair price for a used 750 gold chain weighing 12 grams would be the current price per gram multiplied by 12 grams, adjusted for any additional value based on the design and condition of the chain. It is recommended to research current market prices and compare prices from reputable sources before making a purchase. **

The price of a used 750 gold chain with 12 grams will depend on the current market price of gold, the design and craftsmanship of the chain, and any additional factors such as brand or condition. As of now, the price of 750 gold is around $40-50 per gram, so a 12-gram chain would be valued at approximately $480-$600 for the gold content alone. However, the final price could be higher if the chain has a unique design or is from a well-known brand. It is recommended to get the chain appraised by a professional jeweler to determine its fair market value. **