Contemporary plays can be considered modern in the sense that they reflect current societal issues, values, and cultural norms. They often incorporate modern technology, language, and themes that are relevant to today's audience. However, the term "modern" can also refer to a specific historical period in theater, typically the late 19th and early 20th centuries, so in that sense, contemporary plays may not be considered modern. Overall, the classification of contemporary plays as modern depends on the context and definition being used. **

A modern 12-liter 4-cylinder gasoline engine can last anywhere from 150,000 to 300,000 miles with proper maintenance and care. Factors such as driving habits, maintenance schedule, and environmental conditions can all impact the lifespan of the engine. Regular oil changes, tune-ups, and following the manufacturer's recommended maintenance schedule can help extend the life of the engine. **

One liter of milk is heavier than one liter of water. This is because milk has a higher density than water due to the presence of proteins, fats, and other compounds. Therefore, even though both liquids occupy the same volume, the milk will weigh more than the water. **

Both 1 liter of milk and 1 liter of water have the same weight, which is 1 kilogram. This is because the density of water is 1 kg/L, and the density of milk is also very close to 1 kg/L. Therefore, the weight of 1 liter of milk and 1 liter of water is the same. **

Both 1 liter of feathers and 1 liter of iron have the same volume, so they would weigh the same. However, the feathers would take up much more space than the iron due to their lower density. This is a classic riddle that plays on the misconception that feathers are lighter than iron, when in fact, the weight is the same when measured in the same volume. **

No, 1 liter of oil is not the same as 1 liter of water. While both are measured in liters, they have different densities and properties. Oil is less dense than water, so 1 liter of oil will weigh less than 1 liter of water. Additionally, oil and water do not mix together, as they have different chemical compositions. Therefore, 1 liter of oil and 1 liter of water are not the same. **

If you have 1 liter of water and you pour it into a container with a volume of 500 milliliters, the container will overflow as it cannot hold the entire liter. However, if you pour the 1 liter of water into a container with a volume of 2 liters, there will be extra space left in the container. This is because the container has a larger volume capacity than the amount of water you poured into it. **

3-liter cars refer to vehicles that have an engine with a total displacement of 3 liters, which is a measurement of the total volume of all the cylinders in the engine. These cars typically have larger engines, which can provide more power and performance compared to smaller engine sizes. The 3-liter engine size is often found in sports cars, luxury vehicles, and some SUVs, offering a balance between power and fuel efficiency. **