If the critical angle for a glass–air boundary is 45º, what is the refractive index of the glass?
The volume of a fixed mass of gas at 0º C is 200 m\(^3\). What is its volume at 273º C at constant pressure?
The device that operates using the magnetic effect of electric current is
Calculate the decay constant of a radioactive isotope of half-life 138.5 s.
How long will it take to heat 4 kg of water from 30ºC to 65ºC using an electric kettle taking 5 A from a 240 V supply?
(Specific heat capacity of water = 4200 J kg\(^{-1}\) K\(^{-1}\))
