Question 4751:

Which of these statements is correct about cathode rays. They are fast moving ____________

A. Atoms
B. Neutrons
C. Electrons
D. Ions

Question 4752:

Which of the following has the highest surface tension.

A. Soapy wate
B. Cold wate
C. Warm wate
D. Salt wate

Question 4753:

A truck traveling with a velocity of \(40 m / s\) applies the brakes and comes to a halt after 20 seconds. What is the distance traveled by the truck before coming to a halt

A. 40 m
B. 800 m
C. 400 m
D. 10 m

Question 4754:

If the linear expansitivity of a metal rod is \(4 \times 10^{-5}\) per C, what will be the new length of thr rod if it heated heated from \(15^{\circ} C\) to \(95^{\circ} C\) from its original length of \(20 cm\)

A. \(0.064 cm\)
B. \(0.64 cm\)
C. \(20.64 cm\)
D. \(20.064 cm\)

Question 4755:

\(44 KJ\) of heat was used in raising the temperature of \(2 kg\) of paraffin oil from \(360 K\) to \(370 K\). Calculate the specific heat capacity of paraffin oil

A. \(2.2 J / kg / K\)
B. \(22 \times 10^{3} J / kg / K\)
C. \(22 \times 10^{5} J / kg / K\)
D. 220 I kg / K