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Why After three half-lives what fraction of a radioactive sample remains?
After three half-lives, only 1/8 (or 12.5%) of the original radioactive sample remains. This is because each half-life reduces the amount of radioactive material by half, so after three half-lives, you would have (1/2) * (1/2) * (1/2) = 1/8 of the original sample remaining.
What do the different movements of watches?
The two main categories are mechanical and quartz. Mechanical watches are split into two categories: manual and self-winding (aka automatic watch). Mechanical watches are powered by a wound spring that drives the gears. Automatic watches have a small spinning weight (called a rotor) that helps wind the spring which powers the watch. Manual watches rely on the watchwearer to wind the crown (knobs on a watch). Quartz watches are mostly powered by batteries and use the fast vibration of a quartz crystal to keep time.
If the mass remains constant what happens to the acceleration of an object is the unbalanced force on it is tripled?
If the mass of the object remains constant and the unbalanced force on it is tripled, the acceleration of the object will also triple. According to Newton's second law of motion (F=ma), acceleration is directly proportional to the force applied, so increasing the force by three times will result in the acceleration being three times greater.
What is a chronograph movement as apposed to an automatic or quartz movement?
Typically, "Chronograph" does not describe the movement of a watch, but rather the "complication" of a watch's movement. A watch's complication is anything that provides advanced functionality, such as moon-phase display or perpetual calendar. In this case, "Chronograph" refers to a watch that is capable of stopwatch functionality in addition to timekeeping. Usually this is built into three separate dials for hours, minutes, and seconds. Such a watch can have any movement type (automatic, quartz), and can also have several complications at once. Note that digital watches with stopwatch functionality are considered "digital chronographs", and there is also the "analog-digital chronograph". Some online retailers confuse complications with the actual movement (putting "chronograph" for the movement), so further research should be done to determine whether the watch actually uses quartz or automatic movement.
What are three examples of reference points that are stationary reltive to earth?
Mount Everest: Its height remains constant regardless of the movement of the Earth. The North Pole: It acts as a fixed point for navigation as the Earth spins on its axis. Local post office: Its location on the Earth's surface remains stationary even as the Earth rotates.
What percentage of the halite remained after three minutes?
5
Does quartz split in three directions?
No, quartz doesn't have distinctive cleavage, it will tend to break with a conchoidal fracture.
What is the origin of quartz?
Quartz is a naturally occurring mineral found in all three rock types.
How long is three quarters?
Three quarters is equivalent to three-fourths of a whole, which can be expressed as 0.75 in decimal form or 75% in percentage terms. In terms of time, three quarters of an hour is 45 minutes.
Does quartz have three prominent cleavage directions developed at right angles to one another so that it breaks into cubes?
No, quartz has no cleavage.
What is three-eights in percentage?
three-eights in percentage = 37.5%
Is quartz a three-dimensional framework silicate?
Yes, quartz is a three-dimensional framework silicate. It is composed of silicon-oxygen tetrahedra linked in a continuous framework structure, where each silicon atom is bonded to four oxygen atoms. This arrangement gives quartz its characteristic hardness and crystal structure.
Is quartz igneous?
Theoretically yes, though any given sample of quartz may contain inclusions (non-quartz stuff trapped inside) making it heterogeneous.
What percentage of three is five?
The percentage of three that is five is 166.67%.
What fraction of a sample remains after three half lives?
An eighth remains.
How many quartz in 3 cups?
Three cups = 3/4 quart.
What percentage of an hour is 45 minutes?
Well, isn't that a happy little question! If we think about it, an hour has 60 minutes in total. So, if we have 45 minutes, we can simply divide 45 by 60 to find the percentage. That would be 75%, which means you're not too far off from a full hour of time. Just a few minutes short, but still a beautiful part of the whole hour!
