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The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.
Physics is the scientific study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. [1] Physics is one of the most fundamental scientific disciplines. [2] [3] [4] A scientist who specializes in the field of physics is called a physicist.
On 12 April 2018, the police said that Rakesh Kumar, who leaked the class 12 economics paper, had leaked class 10 mathematics paper also. [40] Consequently, the Central Board of Secondary Education has put in place a system of "encrypted" question papers, which are supposed to be printed by the schools half an hour before the exam starts.
The team for the International Physics Olympiad is selected based on a rigorous procedure of theory and practical examinations (Normally, 3 each) at OCSC Physics.60% (240 marks) weightage is given to the theory exam, and 40% (160 marks) to the practical one, akin to that at the International Physics Olympiad. The difficulty level is similar to ...
But if one requires an exact solution or a solution describing strong fields, the evolution of both the metric and the stress–energy tensor must be solved for at once. To obtain solutions, the relevant equations are the above quoted EFE (in either form) plus the continuity equation (to determine the evolution of the stress–energy tensor):
It is also not clear whether there is any principle by which string theory selects its vacuum state, the physical state that determines the properties of our universe. [11] These problems have led some in the community to criticize these approaches to the unification of physics and question the value of continued research on these problems. [12]
Free response questions require test takers to respond to a question or open-ended prompt with a prose response. In addition to being graded for factual correctness, free response questions may also be graded for persuasiveness, style, and demonstrated mastery of the subject material.
Conceptual problems are often formulated as multiple-choice questions, making them easy to use during in-class discussions, particularly when utilizing active learning, peer instruction, and audience response. An example of a conceptual question in undergraduate thermodynamics is provided below: