15. What is the principle of equivalence in general relativity? A. Gravitational mass is equivalent to inertial mass B. Energy and mass are interchangeable C. Time dilation occurs in a gravitational field D. Space and time are interconnected 16. Which of the following is NOT a branch of classical physics? A. Optics B. Thermodynamics C. Quantum mechanics D. Acoustics 17. The study of the motion of fluids is called: A. Hydrodynamics B. Electromagnetism C. Geophysics D. Thermodynamics 18. In which year did Max Planck propose the quantum hypothesis? A. 1900 B. 1913 C. 1925 D. 1932 19. What is the primary difference between classical mechanics and quantum mechanics? A. Classical mechanics deals with macroscopic objects, while quantum mechanics deals with microscopic objects B. Classical mechanics describes the motion of objects, while quantum mechanics describes the motion of fluids C. Classical mechanics is deterministic, while quantum mechanics is probabilistic D. Classical mechanics relies on the concept of force, while quantum mechanics relies on the concept of energy 20. The speed of light in a vacuum is approximately: A. 3.00 x 10^8 m/s B. 1.50 x 10^8 m/s C. 9.81 x 10^8 m/s D. 6.67 x 10^8 m/s 21. Who first proposed the existence of a gravitational force between masses? A. Galileo Galilei B. Johannes Kepler C. Isaac Newton D. Nicolaus Copernicus
15. What is the principle of equivalence in general relativity? A. Gravitational mass is equivalent to inertial mass B. Energy and mass are interchangeable C. Time dilation occurs in a gravitational field D. Space and time are interconnected 16. Which of the following is NOT a branch of classical physics? A. Optics B. Thermodynamics C. Quantum mechanics D. Acoustics 17. The study of the motion of fluids is called: A. Hydrodynamics B. Electromagnetism C. Geophysics D. Thermodynamics 18. In which year did Max Planck propose the quantum hypothesis? A. 1900 B. 1913 C. 1925 D. 1932 19. What is the primary difference between classical mechanics and quantum mechanics? A. Classical mechanics deals with macroscopic objects, while quantum mechanics deals with microscopic objects B. Classical mechanics describes the motion of objects, while quantum mechanics describes the motion of fluids C. Classical mechanics is deterministic, while quantum mechanics is probabilistic D. Classical mechanics relies on the concept of force, while quantum mechanics relies on the concept of energy 20. The speed of light in a vacuum is approximately: A. 3.00 x 10^8 m/s B. 1.50 x 10^8 m/s C. 9.81 x 10^8 m/s D. 6.67 x 10^8 m/s 21. Who first proposed the existence of a gravitational force between masses? A. Galileo Galilei B. Johannes Kepler C. Isaac Newton D. Nicolaus Copernicus
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