Can a vector have a negative direction? Vectors having the same length as a particular vector but in the opposite direction are called negative vectors. The magnitude, or length, of a vector, cannot be negative; it can be either be zero or positive. The negative sign is used here to indicate that the vector has […]
What is it called when the server misses the serve in tennis?
What is it called when the server misses the serve in tennis? Singles – a tennis game played by two players. Second Service – the second serve that the server is allowed after missing the first serve. This serve must be successful or the server will lose the point (called a double fault). What is […]
How much heat and pressure is needed for fusion?
How much heat and pressure is needed for fusion? Fusion requires temperatures of about 100 million Kelvin (approximately six times hotter than the sun’s core). At these temperatures, hydrogen is a plasma, not a gas. Plasma is a high-energy state of matter in which all the electrons are stripped from atoms and move freely about. […]
What are the special VFR minimums?
What are the special VFR minimums? If the reported weather is less, a pilot can request a Special VFR Clearance. Several conditions must be met; the visibility must be at least one statue mile, the pilot must remain clear of clouds and at night, the pilot must be instrument rated in an IFR capable aircraft. […]
How can extinction affect humans?
How can extinction affect humans? As species disappear, infectious diseases rise in humans and throughout the animal kingdom, so extinctions directly affect our health and chances for survival as a species. The rise in diseases and other pathogens seems to occur when so-called “buffer” species disappear. Is extinction good or bad? Nevertheless, extinctions can have […]
Where is a delta found?
Where is a delta found? Deltas are located at river mouths. They usually exist at the mouth of a river entering an ocean. However, deltas can also be found where rivers meet a lake. While less common, sometimes deltas occur inland. What is Delta short answer? A delta is a triangular piece of land which […]
What is the wavelength of 1 hertz?
What is a mass defect and why is it important?
What is a mass defect and why is it important? The nuclear mass defect is a fundamental property of a nucleus and is a fixed value corresponding to a certain amount of binding energy for that nucleus. Mass defect and binding energy are important factors in the energy involved in nuclear reactions. Is binding energy […]
What is the percentage of radioactive nuclei left after 3 Half Lives pass?
What is the percentage of radioactive nuclei left after 3 Half Lives pass? Thus the half-life of a nuclear decay process is the time required for the number of unstable nuclei to decrease from [A]0 to 1/2[A]0….Radioactive Decay Rates. Number of Half-Lives Percentage of Reactant Remaining 2 50%2=25% 12(12)(100%)=25% 3 25%2=12.5% 12(12)(12)(100%)=12.5% n 100%2n (12)n(100%)=(12)n% […]