All elements with an atomic number greater than what number are unstable?
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two person are waking same speed.one is walking state and another walking circle. who will go long distance
What seven colors appear to be white when mixed together?
Explain why does sun appear flat during sunrise and sunset?
A bird sitting on a naked wire carrying current feels quite safe, but when the wire between his feet is cut and joined by a very long loop of wire, the bird dies. Why?
Why so coloured clothes sometimes fade in sunlight ?
How are amps and watts related?
a ball of mass 500g moving with a velocity of 10m/s collides with another ball of mass 250g.after the impact,the second ball moved off with a velocity of 8m/s calculate the final velocity of the first ball.
Explain what is time?
The system shown in the figure is in equilibrium. The metal spheres are identical and each has a mass of 2 kg. The surface areas of the pistons are equal and 100 square centimeters each. The density of water is 1 g per cubic centimeter. Assuming that the frictions and masses of the pistons are negligible, what is the mass of G? ( g = 10N/kg )
What is Potassium Hydroxide ?
When the letters of an opposite side board are found in a mirror as reverse,why the same is not shown as up and down?
Mercury is a better barometric fluid than water because?