Question 1
Figure 1 below shows an empty beaker placed on the top of a pan calibrated in grammes
50ml of alcohol of density 0.8g/cm3 was added to the beaker. Show on the diagram the new pointer position
Answer
Mass = 50 x 0.8 = 40g
Reading = 45 + 40 = 85g
Reading = 45 + 40 = 85g
Question 2
Other than the density and the depth, state any other factor that affects the pressure of a fluid.
Answer
Gravitational field strength/ acceleration due to gravity
Question 3
Two samples of bromine vapour are allowed to diffuse separately under different conditions. One in a vacuum and the other in air. State with reasons the conditions in which bromine will diffuse faster
Answer
Bromine diffuses faster in air than in vacuum. Air is in random motion hence faster diffusion unlike in vacuum that has no matter
Question 4
An uncalibrated thermometer is placed first in melting ice then in boiling water. The lengths of the liquid column are 22mm and 79mm respectively. What temperature in 0C would correspond to a length of 63mm
Answer
Question 5
A car radiator has several thin blackened copper fins. Explain
Answer
- Several fins increase surface area for heat loss
- Black surface increase heat emission
- Cooper is a good conductor of heat hence conduct heat away
- Black surface increase heat emission
- Cooper is a good conductor of heat hence conduct heat away