1. 1. C. Read carefully. Encircle the letter of the correct answer. What can be inferred from these two containers? A cup of boiling water and a tea pot of boiling water? a. Both have the same amount of heat b. Both have different temperature Both have same temperature but different amount of heat d. Both have the same amount of heat but different amount of temperatures 2. In which medium does sound travel the fastest? a. solid b. liquid c. gas d. vacuum 3. What is the speed of sound in air if the temperatures changes from 25 C to 45 C? a. 358 m/s b. 343 m/s C. 373 m/s d. 479 m/s 4. When do light refract or bend? a. When light enters different medium b. When speed of light changes of as it enter a different medium c. When light is absorbed d. Both statement A and B are correct 5. Bending of light depends on the following phenomena. Which statement is correct? a. The angle of incidence is equal to the angle of refraction b. The angle of incidence is almost greater than the angle of refraction. c. The angle of incidence is always lesser than the angle of refraction. d. The angle of incidence and the angle of refraction may vary depending on the density medium. 6. How to find speed of a sound wave? a. multiplying frequency and wavelength b. multiplying frequency and amplitude c. multiplying the crest and trough d. dividing frequency and amplitude 7. In which temperature is the sound the loudest? a. 35 C b. 45 C C. 49 C d. 55 C​