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
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.
Density of liquid Z is greater than that of X
B.
Density of liquid V is less than that of liquid X
C.
Density of liquid Y is less than that of liquid Z
D.
Liquid Z has the greatest density of all the three substances.
E.
If liquids V and Z do not mix, liquid Z will float on liquid V.
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.
