$A$ gas cylinder can withstand a pressure of $15 \, atm$. The pressure in the cylinder is $12 \, atm$ at $27 \, ^oC$. Up to what temperature in $^oC$ will the cylinder not burst?

Cinnabar is the ore of

The contrapositive of the statement "If two numbers are not equal,then their squares are not equal" is

$A$ rifle of $20 ~kg$ mass can fire $4$ bullets per second. The mass of each bullet is $35 \times 10^{-3} ~kg$ and its final velocity is $400 ~ms^{-1}$. What force must be applied on the rifle so that it does not move backwards while firing the bullets (in $~N$)?

Compared to blood,our lymph has:

$A$ block of mass $8\, kg$ is at rest on a rough inclined plane as shown in the figure. The magnitude of the net force exerted by the surface on the block will be ......... $N$.