This natural fiber obtained from the stems of a plant of the nettle family has found popularity in modern fibers with a high wet strength, absorbent but dries quickly, it can be spun or woven, has a high rot and mildew resistance and elasticity 50 percent greater than that of CHEM-92; Multiple Choice: What transuranic element is often used in satellites as a source of heat or power? w) Plutonium-238 x) Strontium-90 y) Cesium-137 z) Uranium-235

This natural fiber obtained from the stems of a plant of the nettle family has found popularity in modern fibers with a high wet strength, absorbent but dries quickly, it can be spun or woven, has a high rot and mildew resistance and elasticity 50 percent greater than that of CHEM-92; Multiple Choice: What transuranic element is often used in satellites as a source of heat or power? w) Plutonium-238 x) Strontium-90 y) Cesium-137 z) Uranium-235
by

1 Answer

Answer :

ANSWER: W -- PLUTONIUM-238
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Related questions

In a breeder reactor, new fuel is formed as non-fuel uranium-238 absorbs a neutron and ultimately becomes which of the following fissionable atoms: w) uranium-235 x) plutonium-239 y) uranium-239 z) neptunium-239

Description : In a breeder reactor, new fuel is formed as non-fuel uranium-238 absorbs a neutron and ultimately becomes which of the following fissionable atoms: w) uranium-235 x) plutonium-239 y) uranium-239 z) neptunium-239

Last Answer : ANSWER: X -- PLUTONIUM-239

Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical compound. x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.

Description : Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical ... x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.

Last Answer : ANSWER: Z -- SLIGHTLY LIGHTER THAN URANIUM-238.

Radioactive isotope of Uranium used in Nuclear Bomb is ? A.92 U 235 (Answer) B.92 U 234 C. 92 U 233 D. 92 U 238

Description : Radioactive isotope of Uranium used in Nuclear Bomb is ? A.92 U 235 (Answer) B.92 U 234 C. 92 U 233 D. 92 U 238

Last Answer : A.92 U 235 (Answer)

The radioactive element most commonly detected in humans is: w) potassium-40 x) cobalt-60 y) iodine-131 z) plutonium-238

Description : The radioactive element most commonly detected in humans is: w) potassium-40 x) cobalt-60 y) iodine-131 z) plutonium-238

Last Answer : ANSWER: W -- POTASSIUM-40

Name the element discovered upon its extraction from pitchblende? w) platinum x) uranium y) iridium z) plutonium

Description : Name the element discovered upon its extraction from pitchblende? w) platinum x) uranium y) iridium z) plutonium

Last Answer : ANSWER: X -- URANIUM

For which of the following reasons is plutonium-238 used for generating electricity on spacecraft? w) It is an alpha emitter with long half-life. x) It is a beta emitter with high specific power. y) It occurs abundantly in nature. z) It has low specific power.

Description : For which of the following reasons is plutonium-238 used for generating electricity on spacecraft? w) It is an alpha emitter with long half-life. x) It is a beta emitter with high specific power. y) It occurs abundantly in nature. z) It has low specific power.

Last Answer : ANSWER: W -- IT IS AN ALPHA EMITTER WITH LONG HALF-LIFE. 

Let us consider emission of `alpha`particle from uranium nucleus: `._(92)^(235)U - ._(2)He^(4) to ._(90)Th^(231)` `{:(e = 92, e = 0, e = 90),(p = 92,

Description : Let us consider emission of `alpha`particle from uranium nucleus: `._(92)^(235)U - ._(2)He^(4) to ._(90)Th^(231)` `{:(e = 92, e = 0, e = 90),(p = 92,

Last Answer : Let us consider emission of `alpha`particle from uranium nucleus: `._(92)^(235)U - ._( ... evolve energy C. annihilation D. absorption in the nucleus

Which of the following isotopes is not present in natural uranium? (A) U-238 (B) U-234 (C) U-235 (D) U-232

Description : Which of the following isotopes is not present in natural uranium? (A) U-238 (B) U-234 (C) U-235 (D) U-232

Last Answer : (D) U-232

Enrichment of uranium is done to increase the concentration of__________ in the natural uranium.(A) U-238(B) U-233(C) U-235(D) Pu-239

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Last Answer : (C) U-235

Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206))` `t_(1//2)`

Description : Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206))` `t_(1//2)`

Last Answer : Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha ... 2.303)/(4.5 xx 10^(9)) xx 0.693 log 4`

Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206))` `t_(1//2)`

Description : Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206))` `t_(1//2)`

Last Answer : Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, ... be A. 5.25 B. 0.125 C. 12.5 D. 1.25

The principle behind a breeder reactor is: w) U-235 undergoes fission. x) U-238 is converted to Pu-239, which undergoes fission. y) Deuterium undergoes fission. z) Cobalt-60 undergoes fission.

Description : The principle behind a breeder reactor is: w) U-235 undergoes fission. x) U-238 is converted to Pu-239, which undergoes fission. y) Deuterium undergoes fission. z) Cobalt-60 undergoes fission.

Last Answer : ANSWER: X -- U-238 IS CONVERTED TO Pu-239, WHICH UNDERGOES FISSION. 

The isotope of Uranium capable of sustaining chain reaction is - (1) U-235 (2) U-238 (3) U-239 (4) N.O.T.

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Last Answer : (1) U-235 Explanation: Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table.

Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.

Description : Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.

Last Answer : ANSWER: Y -- NEUTRONS MODERATED TO RELATIVELY LOW ENERGIES.

U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent. (A) 85(B) 50 (C) 3 (D) 97

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Last Answer : (C) 3

Which among the following `"is"//"are"` fissible? a)`._(92)U^(235)` b)`._(92)U^(238)` c)`._(94)Pu^(239)` d)`._(94)Pu^(238)`

Description : Which among the following `"is"//"are"` fissible? a)`._(92)U^(235)` b)`._(92)U^(238)` c)`._(94)Pu^(239)` d)`._(94)Pu^(238)`

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The nucleus `._(92)^(235)U` decays according to `._(92)^(238)U rarr ._(92)^(234)Th + ._(2)^(4)He`. Calculate the kinetic energy of the emitted `alpha`

Description : The nucleus `._(92)^(235)U` decays according to `._(92)^(238)U rarr ._(92)^(234)Th + ._(2)^(4)He`. Calculate the kinetic energy of the emitted `alpha`

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Which of the following nuclear materials is fissile? (A) Uranium-238 (B) Thorium-232 (C) Plutonium-239 (D) None of these

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Last Answer : (C) Plutonium-239

Which of the following is not a naturally occurring nuclear fuel? (A) Uranium-238 (B) Thorium-233 (C) Plutonium-239 (D) None of these

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Last Answer : (C) Plutonium-239

Of the following, which non-fissioning element is used in the cooling water of nuclear power plants to help control the rate of the fission reaction by absorbing neutrons: w) zirconium x) boron y) krypton z) cesium

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Last Answer : ANSWER: X -- BORON

A gaseous organic compound that is best known for its use in preservative solutions has the chemical formula HCHO (read: H - C - H CHEM-92; Short Answer: Give me the name and atomic number of the element I am thinking about. It occupies the same column in the periodic table as selenium. Under standard conditions of temperature and pressure this element is a clear, odorless gas. This element is one of the essential ingredients in the burning process.

Description : A gaseous organic compound that is best known for its use in preservative solutions has the chemical formula HCHO (read: H - C - H CHEM-92; Short Answer: Give me the name and atomic number ... element is a clear, odorless gas. This element is one of the essential ingredients in the burning process.

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Which of the following is artificially produced as it does not occur in nature? (A) Uranium-235 (B) Uranium-233 (C) Plutonium-239 (D) Both (B) and (C)

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Last Answer : (D) Both (B) and (C)

Which of the following is a non-fissile material? (A) Plutonium-239 (B) Uranium-235 (C) Uranium-233 (D) Thorium-232

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Thorium-232 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material. (A) Thorium-233 (B) Uranium-235 (C) Uranium-233 (D) Plutonium-239

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A fast reactor uses: w) an extremely short time to get to the maximum operating reactivity. x) uranium-235 as fuel. y) heavy water as a coolant. z) essentially unmoderated neutrons.

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Last Answer : ANSWER: Z -- ESSENTIALLY UNMODERATED NEUTRONS.

Most of the transuranic elements were first created: w) in Germany x) at Argonne National Laboratory y) in California z) in Russia

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Uranium (`""_(92)U""^(238)`) decayed to `""_(82)Pb""^(206)`. The process is `""_(92)U""^(238)underset(xalpha,ybeta)to.""_(82)Pb""^(206)` `t""_(1//2)of

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The atomic number of uranium is 92 and its atomic mass is 238.how many neutrons does the most common isotope of uranium have.?

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Which one of the following is radioactive ? (1) Cesium (2) Platinum (3) Strontium (4) Thorium

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The speed of light through a single-mode optical fiber is approximately: w) c (equal to 3 x 108 m/s) x) 70 percent of c y) 80 percent of c z) 90 percent of c

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Last Answer : ANSWER: Y -- AN ANGLE GREATER THAN THE CRITICAL ANGLE 

Quantity of fissionable material (i.e. U-235) in natural uranium is __________ percent. (A) 0.71 (B) 6.31 (C) 99.29 (D) 12.73

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Last Answer : (A) 0.71

An element that does not occur in nature but can be produced artificially is – (1) thorium (2) radium (3) plutonium (4) uranium

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An element that does not occur in nature but can be produced artificially is (1) thorium (2) radium (3) plutonium (4) uranium

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Which of the following elements has the highest electronegativity? w) Lithium x) Iodine y) Cesium z) Oxygen

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Last Answer : ANSWER: D -- OXYGEN

Which of the following metals is a solid at room temperature, yet melts in your hand? w) gallium x) cesium y) sodium z) magnesium

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Last Answer : ANSWER: W -- GALLIUM

Which of the following metals melts in your hand? w) gallium x) cesium y) sodium z) magnesium

Description : Which of the following metals melts in your hand? w) gallium x) cesium y) sodium z) magnesium

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Which of the following four elements has the largest atomic radius? Is it: w) strontium x) francium y) calcium z) bromine

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Last Answer : ANSWER: X -- FRANCIUM

The element which is commonly used in nuclear for producing electricity by nuclear fission is – (1) Radium (2) Plutonium (3) Uranium (4) Deuterium

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The radioactive element used in heart pacemakers is – (1) Uranium (2) Deuterium (3) Plutonium (4) Radium

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The element which is commonly used in nuclear for producing electricity by nuclear fission is (1) Radium (2) Plutonium (3) Uranium (4) Deuterium

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The radio-active element used in heart pacemakers is (1) Uranium (2) Deuterium (3) Plutonium (4) Radium

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Nuclear energy is a mineralbased energy source. It is derived from (1) uranium (2) thorium (3) plutonium (4) All of the above

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The energy dissipated when a car hits a tree at 70 miles per hour is ABOUT how much greater than that dissipated at 50 miles per hour? w) 20 percent x) 40 percent y) 70 percent z) 100 percent

Description : The energy dissipated when a car hits a tree at 70 miles per hour is ABOUT how much greater than that dissipated at 50 miles per hour? w) 20 percent x) 40 percent y) 70 percent z) 100 percent

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Consider the following nuclear reactions: `""_(92)""^(238)Mto.""_(y)""^(x)N+2.""_(2)""^(4)He, ""_(x)""^(y)Nto ""_(B)""^(A)L+2beta""^(+)` The number of

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Consider the following nuclear reactions: `""_(92)""^(238)Mto.""_(y)""^(x)N+2.""_(2)""^(4)He, ""_(x)""^(y)Nto ""_(B)""^(A)L+2beta""^(+)` The number of

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An element that does not occur in nature but can be produced artificially is-----? A. Plutonium (Answer) B. Uranium C. Radium D. Thorium

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Assertion `(A):` `._(92)U^(238) (IIIB)overset(-alpha)rarrAoverset(-alpha)rarrB overset(-beta)rarrC` Reason `(R):` Element `B` will be of `II A ` group

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The chemical symbol for Plutonium is: w) Pl (read: P - L) x) Pu y) Pt z) Pm

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Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235. (A) 1 (B) 2 (C) 3 (D) 7

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