Category: Physics

When the circuit is closed which bulb will glow first? Answer: (a) When switch B is closed and switch A is open, no bulb will glow because the circuit is not complete in this case. (b) When switch B is open and switch A is closed, bulbs 1, 2 and 3 will glow. Is a […]

What is the importance of fiber optics? Fiber optic is one of the most important technologies that use light. Fiber optic cables transfer the information from one end to another. One end of the fiber connects to a LED or laser that transmits information; the other end is connected to a device designed to recognize […]

What is the main role of T cells in the immune response? T cells (also called T lymphocytes) are one of the major components of the adaptive immune system. Their roles include directly killing infected host cells, activating other immune cells, producing cytokines and regulating the immune response. Why are they called B cells and […]

Can you tell when an earthquake is coming? No. Neither the USGS nor any other scientists have ever predicted a major earthquake. We do not know how, and we do not expect to know how any time in the foreseeable future. An earthquake prediction must define 3 elements: 1) the date and time, 2) the […]

What is shown about scientific theories by the shift in belief of spontaneous generation? What is shown about scientific theories by the shift in belief of spontaneous generation to the use of other observations to explain where mold and moss come from? Theories usually are false. Theories are not useful. How was spontaneous generation disproved? […]

How do you convert cross multiply? How Does it Work? Multiplying the top and bottom of a fraction by the same amount doesn’t change its value. Step 1: Multiply the top and bottom of the first fraction by the bottom number of the second fraction. Step 2: Multiply the top and bottom of the second […]

What is the meaning of conceptual? Filters. The definition of conceptual is something having to do with the mind, or with mental concepts or philosophical or imaginary ideas. An example of conceptual is when you formulate an abstract philosophy to explain the world which cannot be proven or seen. What is conceptual design in database? […]

When a ceiling fan is switched on it makes 10 rotation? Correct Answer: (c) 30 ∴ the required number of rotations = 40 – 10 = 30. When a ceiling fan is switched off its angular velocity falls to half while it makes 36 rotation? When a ceiling fan is switched off, its angular velocity […]

How do you calculate the net force? Formula of Net Force FN is the force acting on a body. When the body is at rest, the net force formula is given by, FNet = Fa + Fg. What is the meaning of net force? Net force is the vector sum of forces acting on a […]

Where is the electric field the largest? Electric field strength is greatest where the lines are closest together and weakest where lines are furthest apart. What is the symbol for electric field? Symbols for physical quantities and their international units symbol quantity symbol E, E electric field N/C, V/m ΦE electric flux N m2/C, V […]