$A$ particle of mass $200\,g$ executes a simple harmonic motion. The restoring force is provided by a spring of spring constant $80\,N/m$. The time period is .... $sec$.

$A$ man of $50\, kg$ mass is standing in a gravity-free space at a height of $10\, m$ above the floor. He throws a stone of $0.5\, kg$ mass downwards with a speed of $2\, m/s$. When the stone reaches the floor,the distance of the man above the floor will be ........ $m.$

Identify the figure:

In the $Al_{2}Cl_{6}$ dimer,which of the following statements is true regarding the $Al-Cl$ bonds?

Which electron is associated with the least energy?

In which plant group are the sporophylls arranged spirally along an axis to form distinct compact structures called strobili or cones?