Answer: C. An object used to aim at other objects in a game
Explanation: In computer games, a crosshair is used to pinpoint targets, that is, it aims at objects in a game, such as a person to be shot. It derives its name from a term used in guns, the cross hairs in guns are used to direct the bullet at its target.
Games that use crosshairs increase the player's accuracy to hit a target. This addition to computer games became popular in computer games in the 1990s.
The Cold warr occurred first
Do you need to know why the bill of rights was written ? .
Answer:
Mohs hardness, rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised (1812) by the German mineralogist Friedrich Mohs. The Mohs hardness of a mineral is determined by observing whether its surface is scratched by a substance of known or defined hardness.
Related Topics: hardness
To give numerical values to this physical property, minerals are ranked along the Mohs scale, which is composed of 10 minerals that have been given arbitrary hardness values. The minerals contained in the scale are shown in the Table; also shown are other materials that approximate the hardness of some of the minerals. As is indicated by the ranking in the scale, if a mineral is scratched by orthoclase but not by apatite, its Mohs hardness is between 5 and 6. In the determination procedure it is necessary to be certain that a scratch is actually made and not just a “chalk” mark that will rub off. If the species being tested is fine-grained, friable, or pulverulent, the test may only loosen grains without testing individual mineral surfaces; thus, certain textures or aggregate forms may hinder or prevent a true hardness determination. For this reason the Mohs test, while greatly facilitating the identification of minerals in the field, is not suitable for accurately gauging the hardness of industrial materials such as steel or ceramics. (For these materials a more precise measure is to be found in the Vickers hardness or Knoop hardness) Another disadvantage of the Mohs scale is that it is not linear; that is, each increment of one in the scale does not indicate a proportional increase in hardness. For instance, the progression from calcite to fluorite (from 3 to 4 on the Mohs scale) reflects an increase in hardness of approximately 25 percent; the progression from corundum to diamond, on the other hand (9 to 10 on the Mohs scale), reflects a hardness increase of more than 300 percent.
<span>c) movement from rural areas to urban areas
d) decreased number of immigrants to the united states
migration movements can be described in two ways: there was a migration from the rural area to urban area, where industries offer better and steadier jobs than rural one. second, there was a migration from countries towards the US, as the country was an example of what technology could do and many hope to find a better life there.</span>
