Questions asked by Proteus
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How can sunlight damage your eyes?

Draw a graph #v(t)# for body which is moving 15 min with a velocity of 20km/h. Then this body stops for 5 min and then continue to move again for 10 min with velocity of 25 km/h.
What is the average velocity of the body?

Is it true, that we can see stars behind round objects because of somekind of light refraction?

10 friends are shaking hands because they have not seen each other for long time. Every single friend shakes hand from other.
How many times does one friend shake hands?
How many shakes of hands are there (from all of the friends)?

If there is a cup filled with water and oil and I turn it upside down which one of this liquids will be first to hit the ground?

Could any one tell me how to solve this equation?
Thanks :)

Car is driving with a speed of 36km/h. Then the car stops completely in 2 seconds. What is the negative acceleration of the car?

The PERIMETER of isosceles trapezoid ABCD is equal to 80cm. The length of the line AB is 4 times bigger than lenght of a CD line which is 2/5 the lenght of the line BC (or the lines which are the same in lenght). What is the area of the trapezoid?

Dad is 10 years older than his three sons ages combined. In how many years will dad's age be same as ages of his sons combined?

Does anybody know the genome (genetic code) of butterfly?