There are thousands of sizes, shapes and types of bearings. Roller bearings, ball bearings, needle bearings, and tapered roller bearings are the main types. Sizes range from small enough to use a small motor to a large bearing to support the rotating parts of a hydroelectric power plant. These large bearings are 10 feet (3.04m) in diameter and require a crane to be installed.
In these bearings, the ball bearings that rolls back and forth between the inner and outer rings is called the raceway. The balls are kept in cages which distribute them evenly throughout the game. In addition to these parts, there are also many additional parts for special bearings, such as seals to keep oil or grease and dirt from entering, or screws to hold the bearings in place. We won't care about those special things.
Small steel plain bearings (12 mm in diameter) has a volume of 905 cubic mm and a mass of 7.28 g, the specific heat is 0.49 kJ / kg K; In other words, 0.49 kJ of energy is used to lift 1 kg of material into 1 Kelvin.
Now consider what happens if we heat it from room temperature to the temperature of the sun and suppose we can keep it in spheres of the same size:
• Sun surface (5778 K → 5478 K temperature increase): The steel sphere has 19550 J of thermal energy necessary to increase this temperature. Similar to the potential energy of the platform divers, 3 people jump from the platform 10 meters into the water or 1.2g of corn (when feeding), the specific heat of the water is 4186 kJ / kg K, so the bearings can carry 58 ml of water from room temperature to boiling in fact, we received a local flash which was bubbling with air for a few seconds and then the water bump hot was not detected, even a few meters away.
Sun core (15 million K): The steel sphere has an additional energy of 53.5 MJ, which is equivalent to the energy that London buses 45 meters into the water from the platform at 10 meters, sufficiently to boil 1.56 liters of gasoline (in operation) or with 160 liters of water, the animated boiling zone is much larger, allowing the hot gas to expand for a period of time before being crushed under the water pressure around the bubble, then cooled with boiling water. The net effect of temperature may not be noticeable beyond 100m.
In any case, the impact on the ocean surface is not felt. If you have a London bus at the same temperature (mass equal to 1.74 million bearings), the effects can be even more exciting.
One question remains: at 15 million K, does a bearing (mostly steel) behave like a small star, even if it is unstable? Probably not because the density is not high enough. The actual density of the solar core is approximately 150 grams per cubic cm. Which is much higher than iron The solar core is made up of 33% hydrogen, 65% helium and 2% other substances including iron, so the iron in our bearing is not not subjected to the subsequent fusion reaction.
For details, please visit : www.abdultraders.com
- Passing the Certified Business Analysis Professional CBAP certification exam needs a lot of confidence, especially to get certified on the first attempt
- Legitimate provincial fleece carpets were, and still are, made for individual homegrown use, to be utilized as bedding just as floor covers, made by