A temporary magnet should be made from _______?
A temporary magnet should be made from _______?
A. Copper
B. Tin
C. Iron
D. None
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Phosphorus is an essential component of one of the following biological molecules:
Phosphorus is an essential component of one of the following biological molecules:
A. Amino acids
B. Nucleic acids
C. Carbohydrates
D. NoneWhich is the hottest planet in our Solar system?
Which is the hottest planet in our Solar system?A. Venus
B. Neptune
C. Mars
D. None of theseThe average kinetic energy of the molecules of a body determines?
The average kinetic energy of the molecules of a body determines?A. heat
B. temperature
C. internal energy
D. noneThe number of electrons of a neutral atom is automatically known if one knows the?
The number of electrons of a neutral atom is automatically known if one knows the?
A. Atomic number
B. Atomic weight
C. Number of orbitals
D. noneDialysis is used for the treatment of__________?
Dialysis is used for the treatment of__________?A. Kidney failure
B. Heart weakness
C. Brain diseases
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Which of the following is used as a lubricant?A. Graphite
B. Silica
C. Diamond
D. Iron oxideGraphite is best suited for lubrication in air. It is a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant.