S.4 Physics Exercise 02 Caltec S.4

S.4 PHYSICS EXERCISE 02  You are advised to personally do this tutorial first, discuss your results with it anyone, if possible; and then check out the solutions that will follow tomorrow, with Exercise 03  This exercise is marked out of 41 1. The sensitivity of a thermometer can be increased by A. Increasing the volume of the bulb B. Increasing the amount of liquid in the thermometer C. Decreasing the thickness of the stem wall D. Decreasing the diameter of the bore of the capillary tube 2. In a pinhole camera, sharper and taller images are obtained by A: widening the hole and moving the object farther B: narrowing the hole and moving the object nearer C: using a longer camera with a wider hole D: using shorter camera with a narrower hole 3. Pressure in solids depends on A. Density of the material B. Mass of the solid C. Area of contact D. Mass of the solid 4. Which one of the following statements explains why the weather is warmer on a cloudy night and quite cold on a clear night? A. clouds produce heat B. air pockets in the cloud makes clouds good insulators. C. there is no convection during cloudy nights D. the sky absorbs heat from the ground 5. When potassium dichromate dissolves at the bottom of water container, it spreads slowly throughout water by a process called A. Evaporation C. Diffusion B. Capillarity D. Convection SECTION B 1. (a) Define the following terms (i) Work (01 mark) ………………………………………………………………………………………… ………………………………………………………………………………………… (ii) Renewable sources of energy (01 mark) ………………………………………………………………………………………… …………………………………………………………………………………………. (b) Outline the energy changes that take place when a bulb lights from a dry cell. (02marks) ……………………………………………………………………………………… ………………………………………………………………… …………………… 2. (a) Define the following terms as applied to waves: (i) frequency (01 mark) ……………………………………………………………………………………… …