S3, 4 Topical Physics Guiding Questions Caltec S.3

CALTEC-ACADEMY-MAKERERE PHYSICS TOPICAL GUIDING QUESTIONS--2020 DENSITY 1. To calculate the density of an object, which one of the following must be known? i. Height ii. Volume iii. Area iv. Mass v. Weight A. i and ii B. ii and v. C. iii and iv D. ii and iv 2. A block of wood 10m x 5m x 4m has a mass of 80 000 kg. What is the density of this wood? A. 2000kgm-2 B. 4000 kgm-2 C. 200 kgm-2 D. 400 kgm-2 3. The density of gold is 19.3 gcm-2. What is the mass of 10cm3 gold? A. 19.3 g B. 0.193g C. 1.93g D. 193g 4. What is the mass of the copper cube having each side 2cm? ( take dcopper = 9 gcm-3) A. 0.18g B. 72g C. 180g D. 36g 5. What is the volume of 60g wood? ( d wood = 0. 6 gcm-3 ) A. 10cm3 B. 36cm3 C. 100cm3 D. 360cm3 6. Study the table below and use it to spot the correct answer. From the values shown in the table which material has the biggest volume? A. K B. L C. M D. N 7. What is the volume and mass of the block which measures by 2m, by 3m by 5m if its density is 1500 kgm-3? A. 50m3; 75 000 kg B. 100 m3; 75 000 kg C. 30m3; 75 000 kg D. 30 m3; 75 000 kg 8. Two litres of corn oil has a mass of 1. 85kg. What is the density of the oil? A. 1850 kgm-3 B. 925 kgm-3 C. 185 kgm-3 D. 92.5 kgm-3 9. If an object of volume 0.02m3 weighs 500 N in a liquid of density 2000 kgm-3, what is the weight in air? A. 900 N B. 1000 N C. 400 …