Altitude measurement in model rockets is typically done using an altimeter, which is a small electronic device that measures the change in air pressure as the rocket ascends. As the rocket climbs, the air pressure decreases, and the altimeter uses this change to calculate the altitude. Some altimeters also have built-in accelerometers to measure the rocket's velocity and can provide additional data such as maximum altitude reached and descent rate. This information is then recorded and can be used for analysis and tracking the performance of the rocket. **

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The altitude of a rocket model refers to the height or distance it can reach when launched. This is typically measured in feet or meters above the ground. The thrust of a rocket model refers to the force or power it generates to propel itself upward. This is typically measured in pounds or newtons. Both altitude and thrust are important factors in determining the performance and capabilities of a rocket model. **

The legality of a flight altitude depends on various factors such as air traffic control regulations, airspace restrictions, and the specific flight plan. Pilots must adhere to the altitude restrictions set by air traffic control and comply with any airspace regulations in the area they are flying. Additionally, the aircraft's performance capabilities and the weather conditions also play a role in determining the legal flight altitude. Therefore, without specific details about the flight and the regulations in place, it is not possible to determine the legality of the flight altitude. **

The moon's altitude refers to its angular distance above the horizon. The moon's altitude changes throughout the night as it moves across the sky. At its highest point, the moon's altitude can reach around 90 degrees, which means it is directly overhead. The moon's altitude is an important factor for astronomers and navigators when determining its position in the sky. **

Altitude difference refers to the vertical distance between two points, typically measured from sea level. It is the difference in elevation between the highest and lowest points in a given area. Altitude difference is an important factor in determining the topography and terrain of a region, and it can have significant effects on weather patterns, ecosystems, and human activities such as agriculture and transportation. **

The altitude at which a person can survive varies depending on factors such as acclimatization, physical condition, and individual tolerance. Generally, the human body can adapt to higher altitudes over time, but the threshold for survival without supplemental oxygen is typically around 18,000 feet (5,500 meters). Above this altitude, the air becomes too thin to provide sufficient oxygen for the body to function properly, leading to altitude sickness and potentially life-threatening conditions. However, with proper acclimatization and gradual ascent, some individuals can survive at even higher altitudes. **

The altitude at which one can survive varies depending on factors such as individual health, acclimatization, and the rate of ascent. Generally, humans can survive at altitudes up to around 18,000 feet (5,500 meters) without experiencing severe altitude sickness. However, prolonged exposure to altitudes above 26,000 feet (8,000 meters) without supplemental oxygen is not sustainable for most people due to the lack of oxygen at high altitudes. It is important to acclimatize properly and be aware of the symptoms of altitude sickness when ascending to high altitudes. **