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A particle (m = 3 kg) slides down a fric...

A particle (m = 3 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1.5 m) the kinetic energy of the prarticle (in J) is : Figure drawn is schematic and not to scale , take g = `10 ms^(-2)`

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B
In carbon, only s and p-orbitals are available for fonding and therefore, it can accommodate only four pairs of electrons around it. This would limit the maximum covalence to four in carbon.
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