Metals are known to have abundant free electrons. A metallurgical scientist wants to detect the presence of metals in a rock sample. Which of the following best explains the type of detection instrument that the metallurgist should use?
A.) An X-ray detector, because X-rays are produced due to high energy collision of electrons
B.) An X-ray detector, because X-rays are emitted from the nucleus containing neutrons and protons
C.) Special cameras, because infrared rays are produced due to the interaction between free electrons
D.) Special cameras, because infrared rays are produced by very hot objects like metallic rocks
Answers
Answer:
hey mate here is your answer..
you take 1 gram of silver ,you can draw it into a wire that is nearly 2 kilometers long or you can even beat into sheet that is only 0.0000003 meters thick ,amazing isn't it??
Zinc is more reactive than Iron but when dipped in dilute HCl Iron rod will suffer severe corrosion than Zinc, But the same iron and zinc rod when dipped in the same dilute HCl simultaneously Zinc will corrode protecting the iron .
When you are cooling some liquid very rapidly then its freezing point shifts at more lower end (more negative) and if you are heating a solid at rapid rate then its melting point shifts upward that is more positive .
Steels can have a maximum of 2% carbon content .
More the carbon content more brittle will be the Iron structure.
Iron doesn't easily corrodes in basic medium therefore cements are made basic to support TMT rods for longer times.
In Russia FCC metals are used in more than 90% of applications.
Metal Foams have higher toughness than parent metals.
Tensile strength is the design criteria for brittle material and yield strength is the design criteria for ductile materials.
For brittle materials compression strength is 10000 times better than Tensile strength.
More rapid cooling of Iron melt having some carbon content more harder will be the resultant phase and the maximum content acceptable of carbon in Iron is 6.67%.
If a rod of iron having different illumination then Darker region will corrode rather than brighter one.
Deformed or stretched Rod has much higher strength than the original Metallic rod.
Sapphire which is inherently optically transparent may become translucent , opaque or colored by just a small change in its structure.
Piezoelectric materials can produce electricity on the application of pressure./
hope it's helpful for you..
For the metal detection,the X-ray will be used. (option A)
- Firstly, X-rays are widely used in different kind of foreign object detection purposes including all kind of metal detection.
That's why,the usage of special camera as mentioned in Option C and D are not applicable.
- Secondly,the x-rays are produced by the high energy collison of the electrons and that's why Option B is also not applicable.
So,the correct answer is option A.