It is common to experience muscle soreness and fatigue after training, which may make it difficult to lift your arm. This is usually temporary and should improve as your muscles recover. However, if you are experiencing severe pain, weakness, or limited range of motion in your arm, it may be a sign of an injury and you should consult a healthcare professional for further evaluation. **

The left arm can't lift the dumbbells because it may be weaker or less coordinated than the right arm. This could be due to muscle imbalances, lack of strength training, or a previous injury that affects the left arm's ability to lift weights. It's important to address these issues through targeted exercises and gradually increasing the weight to improve the left arm's strength and coordination. **

The amount of weight one can lift with one arm varies greatly depending on the individual's strength, fitness level, and training. On average, a person with moderate strength may be able to lift around 20-30% of their body weight with one arm. However, elite athletes or individuals who specifically train for strength may be able to lift significantly more weight with one arm. It is important to gradually increase weight and always use proper form to prevent injury. **

It is normal to experience muscle fatigue and soreness after a workout, which may temporarily limit your range of motion or make it difficult to lift your arm. This is often a sign that your muscles have been challenged and are in the process of repairing and strengthening. It is important to listen to your body and give yourself time to rest and recover before engaging in intense physical activity again. If the inability to lift your arm persists or is accompanied by severe pain, it is advisable to consult a healthcare professional for further evaluation. **

Rubber seals can be made elastic by adding plasticizers to the rubber compound. Plasticizers help to increase the flexibility and stretchability of the rubber, making it more elastic. Additionally, the rubber can be vulcanized, a process that involves heating the rubber with sulfur to create cross-links between the polymer chains, which increases its elasticity. Proper formulation of the rubber compound and curing process are also important factors in ensuring the rubber seals are elastic. **

To clean moss from rubber seals, start by brushing off as much of the moss as possible using a stiff brush or a scraper. Then, mix a solution of warm water and mild detergent, and use a sponge or soft brush to scrub the affected areas. Rinse the seals thoroughly with clean water and dry them with a clean cloth. To prevent future moss growth, consider applying a commercial moss and mildew remover or using a mixture of water and white vinegar as a natural alternative. Regularly cleaning and maintaining the rubber seals will help prevent moss from accumulating in the future. **

To clean black rubber seals on windows, start by mixing a solution of warm water and mild detergent. Use a soft-bristled brush or cloth to gently scrub the rubber seals with the soapy solution. Rinse the seals thoroughly with clean water and dry them with a clean towel. To prevent future buildup, you can apply a silicone-based lubricant to the seals after cleaning. **

One can find cheap rubber pants, rubber gloves, rubber shirts, and rubber boots at stores that specialize in workwear or outdoor gear, such as hardware stores, department stores, or online retailers like Amazon or eBay. Additionally, thrift stores or second-hand shops may also have these items at a lower cost. It's important to compare prices and quality before making a purchase to ensure you are getting the best deal. **