Light sound heat and basic concepts of nuclear physics in daily life. - One Line Questions

1. Boiling point of water at standard atmospheric pressure is: — 100 degrees Celsius
2. What is the audible range of frequency for a normal human ear? — 20 Hz to 20,000 Hz
3. What is the approximate speed of light in a vacuum? — 3 x 10^8 meters per second
4. Which of the following is an example of the Doppler Effect? — The change in pitch of a siren as it passes
5. Which of the following is a source of sound in everyday life? — A vacuum cleaner
6. The color of an object is determined by the wavelength of light that it: — Reflects
7. What causes an echo? — Reflection of sound
8. Which of the following is a safety concern associated with nuclear power plants? — Management of radioactive waste
9. The pitch of a sound is determined by its: — Frequency
10. The energy produced by the Sun is a result of: — Nuclear fusion
11. Nuclear fission is a process that: — Splits a heavy nucleus into lighter nuclei
12. The primary application of nuclear fusion in power generation is currently: — Under active research and development
13. The process by which heat is transferred through liquids and gases is known as: — Convection
14. The process of heat transfer that does not require any medium is called: —
15. Which phenomenon explains why a person feels warmer when standing near a fire? — Radiation
16. What is the primary method of heat transfer in the Earth's atmosphere? — Convection
17. A thermos flask is designed to minimize heat transfer by which of the following methods? — Conduction, Convection, and Radiation
18. The process of heat transfer through solids is primarily by: — Conduction
19. Which type of lens is used to correct myopia (nearsightedness)? — Concave lens
20. Which of the following is a good insulator of heat? — Glass
21. The unit of frequency is: — Hertz
22. Which property of light allows us to see images in a mirror? — Reflection
23. What is the primary form of energy released in nuclear reactions (both fission and fusion)? — Kinetic and electromagnetic energy
24. Nuclear fusion requires extremely high temperatures and pressures to overcome the electrostatic repulsion between: — Atomic nuclei
25. The process of converting a solid directly into a gas is called: — Sublimation
26. The loudness of a sound is determined by its: — Amplitude
27. What is the main product released during nuclear fission of Uranium-235? — Neutrons and a large amount of energy
28. What is the unit of sound intensity? — Watt per square meter (W/m²)
29. What is the term for sound with a frequency higher than the upper audible limit of human hearing? — Ultrasound
30. The phenomenon of light bending around obstacles is known as: — Diffraction
31. Fahrenheit and Celsius are scales for measuring: — Temperature
32. Which property of sound allows us to distinguish between a trumpet and a violin playing the same note? — Timbre
33. Which of the following is a common application of radioactive isotopes in industry? — Measuring the thickness of materials
34. The Sun generates energy through which nuclear process? — Nuclear Fusion
35. What is the term for the emission of electrons from a metal surface when light shines on it? — Photoelectric effect
36. Which element is commonly used as fuel in nuclear power plants for fission? — Uranium-235
37. The image formed by a plane mirror is: — Virtual and erect
38. Which phenomenon of light is responsible for the blue color of the sky? — Scattering
39. Which phenomenon of light is responsible for the formation of a rainbow? — Refraction and Dispersion
40. When light enters from air to water, it bends towards the normal. This phenomenon is called: — Refraction
41. What is the phenomenon where light bends as it passes from one medium to another? — Refraction
42. When light passes through a prism, it splits into its constituent colors. This phenomenon is called: — Dispersion
43. Which of the following is a form of electromagnetic radiation that carries heat? — Infrared radiation
44. Radioactive isotopes are used in medicine for: — Diagnostic imaging (e.g., PET scans)
45. Half-life is a concept related to: — The rate of radioactive decay
46. What is the 'chain reaction' in nuclear fission? — The splitting of a nucleus by a neutron, releasing energy and more neutrons that cause further fissions
47. A musical instrument produces sound through: — Vibration
48. Which color of light has the longest wavelength? — Red
49. Sound travels fastest in which medium? — Steel
50. Absolute zero temperature is the theoretical temperature at which: — All molecular motion ceases
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