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Which organism does not require oxygen or sunlight to live?
amm... water creatures like octopus etc.
How many minutes of sunlight changes by day?
That varies, depending on the latitude (i.e., where you live) and the time of year.
How many lines of symmetry are there in our national flag?
The answer will depend on who you are and so which country's flag you are asking about.
Why should you keep kites away from power lines?
Quite obvious really. The kite makes a live connection between the ground and the power line - ie STRAIGHT THROUGH YOU. Even if it does burn out quickly - it's simply WAY too much of a risk to even think about it. Those power lines carry a lot of current and the slightest of surges WILL KILL YOU. Not only that - but in some areas, it is illegal to have such items close to power lines.
Is it possible to construct an infinite number of lines that are perpendicular to any given line?
Yes, but only in principle. In practice, you won't live long enough. Putting it in more positive terms: No matter how many lines have already been drawn perpendicular to a given line [segment], there's always enough room for a lot more of them.
