Post Utme Physics Past Questions and Answers

Question 1156:

Rainbow is due to

A. Absorption of sunlight in minute water droplet
B. Diffusion of sunlight through water droplets
C. Ionization of water deposits
D. Refraction and reflection of sunlight by water droplets

Question 1157:

A substance is cooled, the graph below shows how its temperature changes over time
What is happening in the portion of the graph labelled \(X Y\) ?

A. The gas is cooling
B. The liquid is freezing
C. The gas is condensing
D. The liquid is cooling

Question 1158:

Which of the following prefixes does NOT represent a fraction part of a whole unit?

A. Milli
B. Micro
C. Kilo
D. Deci

Question 1159:

The diagram shows a mercury barometer, measure atmospheric pressure
As the atmospheric pressure decreases, which distance decreases?

A. AB
B. CD
C. DE
D. BD

Question 1160:

A stone is tossed from the window of a building at an angle of \(25^{\circ}\) to the horizontal and with and initial speed of \(15 m / s\). If the stone is in flight for \(3.0 s\), how tall is the building? \(\left[g=9.8 m / s ^{2}\right]\).

A. \(2 m\)
B. \(20 m\)
C. \(23 m\)
D. \(25 m\)