Why is steam so powerful?

Why is steam so powerful? The water is still nearby, but it’s now in a gaseous form called steam. This form of water is also called water vapor, and it’s very powerful stuff. This is because steam has a lot of energy. This is because as you continue to add more heat, more water molecules […]

What countries use coal for electricity?

What countries use coal for electricity? Top coal-fired power generating countries China. Producing 4,360.9TWh of power from coal-fired facilities, China occupies the first place in the list. US. The US continues to generate a significant amount of its electricity from coal. India. Japan. South Korea. How much energy is in 1kg of coal? 1kg of […]

How many alternate universes are there?

How many alternate universes are there? One obvious question that arises, then, is exactly how many of these parallel universes might there be. In a new study, Stanford physicists Andrei Linde and Vitaly Vanchurin have calculated the number of all possible universes, coming up with an answer of 10^10^16. How many universes are there in […]

Why did NASA stop using space shuttles?

Why did NASA stop using space shuttles? In 2004, President Bush gave a speech that outlined the end of the shuttle era, without clearly identifying what would come next (or how much it would cost). This decision left NASA in limbo, as they were suddenly dependent on the Russians for access to space. Is the […]

What are the two most important properties of stars?

What are the two most important properties of stars? A star can be defined by five basic characteristics: brightness, color, surface temperature, size and mass. Brightness. Two characteristics define brightness: luminosity and magnitude. Color. A star’s color depends on its surface temperature. Surface Temperature. Size. Mass. What is the most important characteristic of a star […]

What is a good U value for insulation?

What is a good U value for insulation? The best insulating materials have a U-value of close to zero – the lower the better. Building regulations currently stipulate that for a new building, the elements must have maximum U-values as follows: Wall – 0.3 W/m2k. Roof – 0.15 W/m2k. What is the most energy efficient […]

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