Post Utme Physics Past Questions and Answers

Question 1316:

Under constant tension and constant mass per unit length, the note produced by a plucked string is \(500 Hz\) when the length of the string is \(0.90 m\). At what length is the frequency \(150 Hz\) ?

A. \(6 m\)
B. \(3 m\)
C. \(5 m\)
D. \(4 m\)

Question 1317:

Two bodies \(P\) and \(Q\) are projected on the same horizontal plane, with the same initial speed but at different angles of \(30^{\circ}\) and \(60^{\circ}\) respectively to the horizontal. Neglecting air resistance, what is the ratio of range of \(P\) to that of \(Q\) ?

A. \(1: 1\)
B. \(1: \sqrt{3}\)
C. \(\sqrt{3}: 1\)
D. \(1: 2\)