What do you observe after adding the drop of ink or Potassium Permanganate ? How much time does it take for the colour to spread evenly throughout the water ?

A helicopter is ascending vertically with a speed of 8.0 "ms"^(-1) . At a height of 12 m above the earth, a package is dropped from a window. How much time does it take for the package to reach the ground ?

When we added crystals of potassium permanganate to the water, the colour of water will be changed. What will be the reason for it?

What do you observe in the experiment of dropping a fist of Bengal gram seeds in water?

A helicopter is ascending vertically with a speed of 8.0 ms^(-1) .At a height of 120 m above the earth ,a package is dropped from a window.How much time does it take for the package to reach the ground?

It is very Interesting to observe a touch-me-not (Atti-patti or mimosa) plant. Touch it. Record your observations. How.much time does it take to return to its previous position?

Take some water in a wide mouthed bowl. Put an iron nail in it. What do you observe ? Put an empty iron tin in that bowl. What do you observe ?Also try to observe whether a wooden piece floats on water. What happens when a wooden bowl is dipped in water ? what is your conclusion from the above activity?