Related Questions

240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
Which structure connects one bone to another bone?
A Cartilage
B Tendons
C Ligaments
D None of the above
Because it was already known that retroviruses could cause cancer in animals,It seemed only ____ to search for similar cancer causing viruses human being.
A culpable
B Charitable
C Hypothetical
D logical
The incidence of smoking among women, formerly - has grown to such a degree that lung cancer, once a minor problem, has become the chief of cancer-related deaths among women.
A pervasive........opponent
B preeminent......... cure
C minor...........antidote
D relevant..........modifier
Many more people who smoke develop lung cancer than do those who do not smoke. In the face of this evidence, how could a cigarette company representative argue against the conclusion that cigarette smoking cause lung cancer? To answer to the question, the representative could most likely say that
A Many things might cause cancer.
B A single cause may be reponsible for both smoking and cancer.
C People have the right to endanger themselves if they choose to do so.
D People may breathe die, but no one accuses breathing of causing death.
The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called
A Decoction
B Percolation
C Elutriation or elution
D None of these
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
A Thorium
B Radium
C Plutonium
D Radan
Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of
A Segar cones
B Muffles for muffle furnaces
C Insulating bricks
D Crucibles used for melting of high purity metals
Beta rays emitted by a radioactive material are
A The electrons orbiting around the nucleus
B Charged particles emitted by nucleus
C Neutral particles
D Electromagnetic radiations

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