Category: Physics

What are 2 interesting facts about the crust? The crust is the thinnest layer of the Earth. It has an average thickness of about 18 miles (30km) below land, and around 6 miles (10km) below the oceans. The crust is the layer that makes up the Earth’s surface and it lies on top of a […]

What is the oxidation number of H in H2SO4? +6 What type of reaction is H2SO4? Sulfuric acid reacts with most metals in a single displacement reaction to produce hydrogen gas and the metal sulfate. Is H2SO4 a acid? Sulfuric Acid, H2SO4 is a chemical compound made up of two hydrogen atom, one sulfer atom, […]

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 controls the temperature of the earth? Water vapor and clouds are the major contributors to Earth’s greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet’s temperature ultimately depends on the atmospheric level of carbon dioxide. Does being dehydrated raise your temperature? Signs of worsening dehydration are increased body temperature, heart […]

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 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 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? […]