JAMB Physics Past Questions & Answers - Page 111

I. A scalar quantity has only magnitude
II. A scalar quantity has both magnitude and direction
III. A vector quantity has both magnitude and direction
IV. A vector quantity has only magnitude.

Which of the above statement is/are correct?

A block of a substance X will sink in a liquid V but float liquid Z. Which of the following statements is NOT correct about the densities of the three substances?

A boy moving with a velocity of 3 ms^-1 is brought to rest by a constant force after travelling 15m. Calculate the retardation.

The length of a side of a metallic cube at 20° C is 5.0cm. Given that the linear expansively of the metal is 4.0 × 10^-5K^-1, find the volume of the cube at 120° C

The smallest unit on the sleeve of a micrometer screw gauge is 0.5mm. There are fifty divisions on the thimble of the screw gauge.
What is the smallest length that can be measured with this instrument?