Question 1
The figure below shows a digram of part of a vernier callipers that has a zero error of -0.02cm. Determine the length of the object measured using vernier callipers
Answer
Question 2
100cm3 of sea water of density 1150kg/m3 is mixed with 100cm3 of fresh water of density 1000kg/m3. determine density of the mixture.
Answer
Question 3
Two identical spring balances X and Y each weighing 0.125N are arranged as shown in the diagram
What is the reading on spring balance X
Answer
3.5 + 0.125 = 3.625N
Question 4
The reading of mercury barometer is at 70.0cm. What is the pressure at the place in N/m2. {Assume density of mercury is 1.36 x 104 kg/m3}
Answer
Question 5
Using the kinetic theory of matter, explain why solids expand when heated
Answer
Molecule in a solid are closely packed and when heated, forces of attraction between them are weakened. They move apart so they need more space