Everyday Science
Which radioactive element is used in making artificial pacemaker of heart:
Uranium 235
Plutonium 238
Thorium
Radium
Plutonium 238
Plutonium-238
Pacemakers are used to stimulate a regular heartbeat when the body’s natural electrical pacing system is irregular or not transmitting properly. Over the years, various power sources have been used for pacemakers, including a radioactive material called plutonium-238.
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B. water
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A. uniform
B. not uniform
C. zero
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In the body, the weight of blood is about
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B. 1/5th of body
C. 1/8th of body
D. 1/4th of body
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C. Carbon
D. Copper
The energy stored in coal is
A. kinetic energy
B. potential energy
C. chemical energy
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A human breath per minute is
A. 16-30 times
B. 16-20 times
C. 15-20 times
D. 15-18 times
Symbol of Copper is
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B. Cl
C. Co
D. Cu
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