a stone is projected horizontally with 20 metre per second from the top of a tall building calculate its position in velocity after 3 seconds neglecting the air resistance .

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

level 4 to level 2 : ))

it's c (engineer's do their work with mechanical stuff not on any living being)

4d^55s^1 ( third choice)