Fluorosis disease is caused due to the reaction of ...... with excess of fluoride in the body.

When a body moves in a circular path,no work is done by the force since,

$A$ light string passing over a smooth light pulley connects two blocks of masses $m_1$ and $m_2$ (vertically). If the acceleration of the system is $g / 8$,then the ratio of the masses $m_1 : m_2$ is

If $A$ and $B$ are two independent events such that $P(B)=\frac{2}{7}$ and $P(A \cup B^c)=0.8$, then $P(A)$ is equal to:

Identify the organism shown in the given figure.

Which of the following statements is true?