Category: Physics

What charges can move easily? Electrons can move more easily in some objects than in others. If you put a charge on things like glass, plastic, rubber, and wood, that charge stays where you put it. We say the charges are static, and we call this static electricity. Materials like glass and plastic are called […]

What is attenuation formula? Attenuation for electrical signals has a formula: Attenuation (dB)= 10 X log(PI/PO) Where PI is input power and PO is the output power. PI is the power applied at one end of the cable, while PO is the wattage at the end of the cable. An attenuator is a passive or […]

What happens if your cones are damaged? Damage to cone cells can result in decreased clarity of vision (reduced visual acuity) when looking straight ahead (central vision), a reduced ability to see colors and an abnormal sensitivity to light (photophobia). In some cases, affected individuals may not be able to see color at all. How […]

Why does it take so much energy to keep the electrons of an atom close together? The energy released in fission is due to the electrostatic repulsion of protons. Normally the strong nuclear force manages to overcome this electrostatic repulsion, when protons and neutrons are very close together in a nucleus. What happens to the […]

Is a curved line a function? Non-linear means the graph is not a straight line. The graph of a non-linear function is a curved line. A curved line is a line whose direction constantly changes. A cautionary note: Economists are accustomed to designate all lines in graphs as curves – both straight lines and lines […]

What do numbers on a topographic map mean? Horizontal distance is found on the scale. As you look at the map, notice that the contour lines enclose smaller and smaller areas. The smallest circles represent the tops of peaks, and some are marked with x’s with numbers next to them. The numbers are the elevation […]

Is gravity stronger in different parts of the world? Gravity is what holds our world together. However, gravity isn’t the same everywhere on Earth. Gravity is slightly stronger over places with more mass underground than over places with less mass. Where is gravity maximum on earth? Variation of acceleration due to gravity (g) with latitude: […]

How does a pycnometer measure density? Dry the sides and weigh the full pycnometer on the analytical balance. Measure the temperature of the water. Use the known density of water located in the CRC handbook to determine the volume of water contained in the full pycnometer flask. Be certain to use the known density value […]

How do we use matter in daily life? So the food that we eat everyday consists atoms as well as molecules. Therefore, the food are also a kind of matter without which we cannot survive. 3. The clothes that we wear, all the necessary things like pencil, brush, utensils all are made of matter. Why […]

What are the two types of astronomy? Since the 20th century there have been two main types of astronomy, observational and theoretical astronomy. Observational astronomy uses telescopes and cameras to observe or look at stars, galaxies and other astronomical objects. What are the fields of astronomy? We can divide astronomy into 4 sub-fields: ASTROPHYSICS: Applying […]