The Physics Hypertextbook

Buoyancy (also called buoyancy) is the force exerted on an object that is totally or partially immersed in a fluid.

Buoyancy is caused by the differential pressure acting on the opposite side of the object immersed in a static fluid.

The change in pressure in the fluid is usually caused by gravity (because of P = P 0 + ρ g), but buoyancy is usually opposite to the direction of the reference acceleration frame.

Probably the most important feature of visible light is color. Color is the essential nature of light, it is also an artifact of the human eye. According to Glenn Elert, author of The Physics Hypertextbook, this object does not have "color". Instead, they emit light that "looks" like colors. In other words, El is close-up, color exists only in the sidelines mind. According to NASA's mission science website, our eyes contain special cells called cones that act as receivers of this narrow band wavelength. At the lower end of the visible spectrum, light with a longer wavelength of about 740 nm is considered red; light in the middle of the spectrum is considered green; light at a wavelength of about 380 nm at the top of the spectrum is considered purple. All other colors we feel are a mixture of these colors

Our exams are based on HyperTextBook reading, writing experiments, exercises, and other materials. The main purpose of the exam is to carefully read the text and to make sure of the concepts covered in this course. As there are no makeup tests on the course and no additional credit options, students should carefully consider HyperTextBook and prepare each exam carefully. I will insist on this policy for a reason: While other students are doing enough, I think that it is unfair for some students to finish all work throughout the semester - and still courses I want to pass. Therefore, in all parts of the course, students need to complete all the tasks to qualify for the course.