A train is sounding its horn as it approaches a station. The engine driver hears a note of frequency f0 and of constant amplitude as the train slows down and…

A bar magnet is rotating at a constant rate of 120 revolutions per minute inside a circular coil of wire, causing an induced voltage across the coil. Which of the…

A 100% efficient ideal transformer has 400 turns on its primary coil and 100 turns on its secondary coil. The input voltage across the primary coil is 240 V. An…

The radioactive isotope carbon-14 is found in living material in small quantities. There areapproximately 1000 carbon-14 atoms for every 10 15 carbon-12 atoms. Whilst the material is stillliving this ratio…

A graph of kinetic energy, in joules ( y - axis) against the square of the speed in (m / s) 2 (x - axis) is plotted for an object…

Light travels through glass at a speed which is 2/3 of its speed through air.Light travels through water at a speed which is 3/4 of its speed through air.A ray…

Consider the following three statements:1 A mass of 4.0 kg requires a resultant force of 5.0 N to act on it in order toaccelerate it at 1.25 m / s…