What happens to the speed of sound in air when the pressure increases at a constant temperature
The operation of a photovoltaic cell is possible by the action of
A concave mirror of focal length 20cm produces an erect image that is four times the object, the object distance from the mirror is
The resultant of the force shown above is
A circular parallel plate capacitor with radius 6cm is separated by 0.12cm. Calculate the capacitance of the capacitor [\(\pi\) = 3.142, ε\(_0\) = 8.85 x 10\(^{-12}\)Nm\(^2\)C\(^2\)]
