Question 4736:

A uniform beam HK of length \(10 \mathrm{~m}\) and weighing \(200 \mathrm{~N}\) is supported at both ends. A man weighing, \(100 \mathrm{~N}\) stands at a point \(P\) on the beam. if the reactions at \(\mathrm{H}\) and \(\mathrm{K}\) are respectively \(800 \mathrm{~N}\) and \(400 \mathrm{~N}\), then the distance HP is ____________

A. \(4 \mathrm{~m}\)
B. \(3 \frac{1}{3} \mathrm{~m}\)
C. \(3 m\)
D. \(6 \frac{2}{3} \mathrm{~m}\)
E. \(7 \mathrm{~m}\)

Question 4737:

What are the units of thermal conductivity?

A. Kg.m.sec \({ }^{2}\)
B. Joule. \(\sec ^{-1} \mathrm{~m}^{-1} \mathrm{k}^{-1}\)
C. \(\mathrm{kg} \cdot \mathrm{m}\)
D. Newton. \(\sec ^{-1} \mathrm{~m}^{-1} \mathrm{k}^{-1}\)
E. \(m^{1}\)

Question 4738:

A \(500 \mathrm{~kg}\) car which was initially at rest travelled with an acceleration of \(5 \mathrm{~m} / \mathrm{s}^{2}\), its kinetic energy after 4 seconds was ____________

A. \(10^{5} \mathrm{~J}\)
B. \(2.5 \times 10^{3} \mathrm{~J}\)
C. \(2 \times 10^{3} \mathrm{~J}\)
D. \(5 \times 10^{3} \mathrm{~J}\)

Question 4739:

An air force jet flying with a speed of \(335 \mathrm{~ms}^{-1}\) went past an anti-aircraft gull. How far is the aircraft Ss later when the gun was fired?

A. \(8.38 \mathrm{~m}\)
B. \(3.350 \mathrm{~m}\)
C. \(670 \mathrm{~m}\)
D. \(1675 \mathrm{~m}\)
E. \(67 \mathrm{~m}\)

Question 4740:

In a D.0 circuit a 10 microfarad (mf) capacitor is placed in series with a 10-ohm resistor. The total resistance of the combination is ____________

A. 10 ohms
B. 1 ohm
C. Zero
D. 20 ohms
E. Infinite