Half life of radium is 1580 years. It remains 1/16 after the…..

Half life of radium is 1580 years. It remains 1/16 after the…..
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Half life of radium is 1580 years. It remains 1/16 after the….. A. 1580 years B. 3160 years C. 4740 years D. 6320 years
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If half life period of radium is 1600 years, its average life period will be:

Description : If half life period of radium is 1600 years, its average life period will be:

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A circular solid of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in joules is 1. 395 2. 790 3. 1580 4. 3160

Description : A circular solid of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in joules is 1. 395 2. 790 3. 1580 4. 3160

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79.93 × 35.02 -59.93 × 85.08 + 74.98 × 44.04 =? a) 1420 b) 1000 c) 1580 d) 870 e) 1260

Description : 79.93 × 35.02 -59.93 × 85.08 + 74.98 × 44.04 =? a) 1420 b) 1000 c) 1580 d) 870 e) 1260

Last Answer : ? ≈ 80 × 35-60 × 85 + 75 × 44 =2800 – 5100 + 3300 = 1000 Answer: b)

P and Q invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and P’s share is Rs. 855, the total profit is: A.Rs. 1435 B.Rs. 1500 C.Rs. 1538 D.Rs. 1580

Description : P and Q invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and P’s share is Rs. 855, the total profit is: A.Rs. 1435 B.Rs. 1500 C.Rs. 1538 D.Rs. 1580

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P, Q and R jointly thought of engaging themselves in a business venture. It was agreed that P would invest Rs. 3250 for 6 months, Q, Rs. 4200 for 5 months and R, Rs. 5,000 for 3 months. P wants to be the working member for which, he was to receive 10% of the profits. The profit earned was Rs. 3700. Calculate the share of Q in the profit. A) Rs. 1800 B) Rs. 1260 C) Rs. 1580 D) Rs. 1940

Description : P, Q and R jointly thought of engaging themselves in a business venture. It was agreed that P would invest Rs. 3250 for 6 months, Q, Rs. 4200 for 5 months and R, Rs. 5,000 for 3 months. P wants to be the ... Calculate the share of Q in the profit. A) Rs. 1800 B) Rs. 1260 C) Rs. 1580 D) Rs. 1940

Last Answer : Answer: B) For managing, P received = 10% of Rs. 3700 = Rs. 370. Balance = Rs. (3700 - 370) = Rs. 3330. Ratio of their investments = (3250 x 6) : (4200 x 5) : (5000 x 3)  = 19500 : 21000 : 15000  = 13 : 14 : 10 Q's share = Rs. 3330x 14 / 37 = Rs. 1260

`""^(226)Ra` disintegrates at such a rate that after 3160 years, only one fourth of its original amount remains . The half life of `""^(226)Ra` will b

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The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be __________ of its original weight. (A) 1/2 (B) 1/4 (C) 1/8 (D) 1/16

Description : The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be __________ of its original weight. (A) 1/2 (B) 1/4 (C) 1/8 (D) 1/16

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What fraction of an original sample of a radio isotope remains after 3 half-life periods?

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What fraction of an original sample of a radio isotope remains after 3 half-life periods?

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The half life of cobalt 60 is 5.3 yers after 10.6years how much of the original cobalt 60 remains?

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The activity of a radioactive element reduces to `(1//16)th` of its original value in 30 years. Find its half life?

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The characteristic of non-linear pharmacokinetics include : (A) Area under the curve is proportional to the dose (B) Elimination half-life remains constant, (C) Area under the curve is not proportional to the dose (D) Amount of drug excreted through remains constant

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The plasma half life of aspirin (along with salicylic acid released from it): A. Remains constant irrespective of dose B. Is longer for antiinflammatory doses compared to that for analgesic dose C. Is shorter for antiinflammatory doses compared to that for analgesic dose D. Can be shortened by acidifying urine

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Initial amount of the radioactive element with half life 10 days is 16 g. What amount in gm of this element will remain after 40 days?

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The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm. (A) 1/4 (B) 1/8 (C) 1/2 (D) 1/16

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Who discovered radium?

Description : Who discovered radium?

Last Answer : The Curies

Who discovered radium? -General Knowledge

Description : Who discovered radium? -General Knowledge

Last Answer : Radium was discovered by Marie Sklodowska-Curie and her husband Pierre Curie on 21 December 1898, in a uraninite (pitchblende) sample from Jáchymov. While studying the mineral earlier, the Curies removed uranium from it and found that the remaining material was still radioactive.

Who discovered radium ?

Description : Who discovered radium ?

Last Answer : Radium scientist Mary Curie discovered.

What is the signal of radium ?

Description : What is the signal of radium ?

Last Answer : Ra Radium signal

What is the symbol of radium ?

Description : What is the symbol of radium ?

Last Answer : The symbol of radium is Ra

In what year was radium discovered ?

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Last Answer : In 1899 , Pierre and Marie Curie discovered radium.

Who Discovered Radium ?

Last Answer : Discovered Radium (Madame Curie and Pierre Curie)

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Last Answer : Need answer

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What is the first decay product of radium?

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How many pages does Radium Girls have?

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If the nucleus of a radium-226 atom is unstable what causes the nucleus to spontaneously decay?

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The beach sands of Kerala are rich in – (1) Calcium (2) Radium (3) Thorium (4) Manganese

Description : The beach sands of Kerala are rich in – (1) Calcium (2) Radium (3) Thorium (4) Manganese

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The chief raw material used for manufacturing Rayon is : (1) Nylon (2) Cellulose (3) Silicon (4) Radium and Argon

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Which of the following is used as a moderator in nuclear reactors? (1) Thorium (2) Graphite (3) Ordinary water (4) Radium

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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

Description : 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 caused radioactive pollution along the coast of Kerala? (1) Plutonium (2) Zinc (3) Thorium (4) Radium

Description : Which of the following caused radioactive pollution along the coast of Kerala? (1) Plutonium (2) Zinc (3) Thorium (4) Radium

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The moderator used in a nuclear reactor is – (1) Uranium (2) Radium (3) Ordinary water (4) Graphite

Description : The moderator used in a nuclear reactor is – (1) Uranium (2) Radium (3) Ordinary water (4) Graphite

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Which adioactive pollutant has recently drawn the attention of the public due to its occurrence in the building materials? (1) Radium (2) Radon (3) Thorium (4) Rlutonium

Description : Which adioactive pollutant has recently drawn the attention of the public due to its occurrence in the building materials? (1) Radium (2) Radon (3) Thorium (4) Rlutonium

Last Answer : (3) Thorium Explanation: Thorium, a naturally occurring radioactive element, four times more abundant than uranium in the earth's crust.

Which of the following elements is not radioactive? (1) Radium (2) Plutonium (3) Zirconium (4) Uranium

Description : Which of the following elements is not radioactive? (1) Radium (2) Plutonium (3) Zirconium (4) Uranium

Last Answer : (3) Zirconium Explanation: Zireonium is a lustrous, greywhite, strong transition metal that resembles titanium. Zirconium is mainly used as a refractory and pacifier, although it is used in small amounts as an alloying agent for its strong resistance to corrosion.

In a nuclear reactor the material use for absorbing neutrons is – (1) zinc (2) radium (3) lead (4) cadmium

Description : In a nuclear reactor the material use for absorbing neutrons is – (1) zinc (2) radium (3) lead (4) cadmium

Last Answer : (4) cadmium Explanation: One isotope of cadmium, 113Cd, absorbs neutrons with very high probability if they have an energy below the cadmium cut-off and transmits them otherwise. The cadmium ... below the cut-off are deemed slow neutrons, distinguishing them from intermediate and fast neutrons.

The long range potential of nuclear energy in India depends on its reserves of – (1) thorium (2) uranium (3) plutonium (4) radium

Description : The long range potential of nuclear energy in India depends on its reserves of – (1) thorium (2) uranium (3) plutonium (4) radium

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Which one of the following is used for dating very old objects of archaeological importance? (1) Phosphorus-31 (2) Tritium (3) Radium (4) Carbon-14

Description : Which one of the following is used for dating very old objects of archaeological importance? (1) Phosphorus-31 (2) Tritium (3) Radium (4) Carbon-14

Last Answer : (4) Carbon-14 Explanation: Radiocarbon dating (usually referred to as simply carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 (140 to estimate the age ... (fraction) of 14C declines at a fixed exponential rate due to the radioactive decay of14C.

Which one of the following is not a radioactive element? (1) Uranium (2) Thorium (3) Radium (4) Cadmium

Description : Which one of the following is not a radioactive element? (1) Uranium (2) Thorium (3) Radium (4) Cadmium

Last Answer : (4) Cadmium Explanation: Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two ... show radioactive properties while the fourth one does not show any kind of radioactive properties.

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

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

Last Answer : (3) Uranium Explanation: Uranium is used to produce a chemical and nuclear reaction which makes a lot of heat.

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

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

Last Answer : (1) Uranium Explanation: The actinides (or actinoids) are the chemical elements with atomic numbers between 90 and 109 inclusively. They occur between Groups 3 and 4 in Period 7 of the periodic table. ... scale, it is also used as a power source in smaller devices such as the heart pacemaker.

Uranium eventually decays into a stable isotope of — (1) Radium (2) Thorium (3) Lead (4) Polonium

Description : Uranium eventually decays into a stable isotope of — (1) Radium (2) Thorium (3) Lead (4) Polonium

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In a nuclear reactor, one of the following is used as a fuel. (1) Coal (2) Uranium (3) Radium (4) Diesel

Description : In a nuclear reactor, one of the following is used as a fuel. (1) Coal (2) Uranium (3) Radium (4) Diesel

Last Answer : (2) Uranium Explanation: Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 has the distinction of being the only naturally occurring fissile isotope. Uranium-238 is ... uranium-233, can be produced from natural thorium and is also important in nuclear technology.