How many main frontiers of fundamental science ?
A2
B1
C4
D3
Correct answer
D. 3
Explanation
3 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Study & Learn
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
D. 3
Explanation
3 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. a = a x r
Explanation
a = a x r is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Graphite
Explanation
The function of a moderator in a nuclear reactor is to slow down neutrons so that they are more likely to cause further fission reactions. Among the options provided, C. Graphite is a good moderator. Graphite is commonly used in certain types of nuclear reactors, such as graphite-moderated reactors, because it effectively slows down neutrons due to its low atomic mass and structure. Helium, Cadmium, and Ordinary Water are not typically used as moderators in nuclear reactors. Helium has a low atomic mass but is used as a coolant in some reactors, Cadmium is often used as a neutron absorber in control rods, and Ordinary Water (H2O) is used as both a coolant and a moderator in pressurized water reactors, but it’s not as efficient a moderator as graphite.
Correct answer
A. interference
Explanation
interference is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Plasma physics
Explanation
Plasma physics is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Speed of lightB.
Explanation
Speed of lightB. is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Slow counting
Explanation
Slow counting is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. All accurately known digits and the first doubtful digit
Explanation
All accurately known digits and the first doubtful digit is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. exerts a force if the charged particle is moving perpendicular to the magnetic field lines
Explanation
exerts a force if the charged particle is moving perpendicular to the magnetic field lines is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Possess all properties
Explanation
Possess all properties is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.