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21.
What is the process by which a gas changes directly from a solid to a gas without passing through the liquid phase called?
Explanation:
22.
Which of the following is a measure of a system's disorder and randomness?
Explanation:
23.
What is the SI unit of electric potential difference?
Explanation:
24.
Which type of current flows in only one direction and does not change over time?
Explanation:
25.
What type of lens is used to correct farsightedness?
Explanation:
26.
Which phenomenon occurs when light waves change direction as they pass through a medium with a different refractive index?
Explanation:
27.
Which of the following is a measure of an object's resistance to changes in rotational motion?
Explanation:
28.
What is the SI unit of pressure?
29.
Which of the following statements is true about the second law of thermodynamics?
Explanation:
30.
What is the SI unit of power?