Science
Gregor Raýman
science
A prime number is
... a natural number greater one not divisible without a remainder by any natural number other than itself and one.
... the diagonal in a square matrix that goes from the upper left corner to the lower right corner.
... the count of all subsets of a set.
... the smallest root of an equation.
(x-1)2 =
x2 + 1
x2 - 2x + 1
x2 + 2x + 1
x2 + 2x - 1
How many planets are in our Solar system?
7
8
9
10
Solar these planets are known planets of our Solar system: Mercury, Venus, Earts, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto
How many legs does a spider have?
4
6
8
12
Water consists of hydrogen and oxygen. What is the relation between those two elements in water?
One atom of hydrogen to one atom of oxygen
Two atoms of hydrogen to one atom of oxygen
One atom of hydrogen to two atoms of oxygen
depends on the temperature
The symbol for water is H2O. There are two hydrogen atoms and one oxygen atom in one water molecule.
There is no air on the Moon. If we let two stones fall from the same height (2m), one of them 1kg and the other 1g heavy, which one will hit the ground first?
The small one, its inertia are 1000x smaller, so it can accelarte more quickly.
The big one, its weight is 1000x bigger, so the the gratiation of the Moon attracts it with 1000x bigger force.
Both will hit the ground at the same time
Neither the small, nor the big one.