I have a question on the grade you awarded me. I have a question on metaphysics. I'm having real trouble figuring out why on doesn't work in your example sentence. D (related) has a wider meaning: it indicates questions that have something to do with the course. In particular, related includes questions about the subject matter of the course.
Physics Forums expert math and physics blog. Read and learn from expert math and science articles, tutorials, and guides. Test your science knowledge with our quiz.
Step by step homework help Stuck on a problem? Quickly find explainers, videos, and results from the web for math, history, chemistry, biology, physics, and more.
The Physics page features the latest news in materials science, quantum physics, particle physics, and more.
Here contains the collection of expert physics articles that deal with physics topics. These span all skill ranges and may include astronomy and cosmology topics.
In physics, tensors are often a mixture of several vector spaces and several dual spaces. It also makes sense to sort both kinds as the tensor product isn’t commutative. Type (p,q) Tensors Definition: A tensor of type of with contravariant and covariant components is an element (vector) of By (1) this tensor is linear in all its components.
Join Physics Forums, where students, scientists, and enthusiasts come together to explore and discuss the current understanding and practice of various scientific fields.
All undergraduate physics majors are shown how the counterintuitive aspects (“mysteries”) of time dilation and length contraction in special relativity (SR) follow from the light postulate, i.e., that everyone measures the same value for the speed of light c, regardless of their motion relative to the source (see this Insight, for example).