Physics
Thermodynamic
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#97 Numerical: Calorimeter of water equivalent 100 g is at 20°C. 200 g water at 80°C is mixed; final T˜
A) 40°C
B) 50°C
C) 60°C
D) 70°C
#98 Numerical: Convert 500 cal to joules (J˜4.186).
A) 1190 J
B) 1674 J
C) 2093 J
D) 2500 J
#99 Numerical: 2 mol ideal monoatomic gas expanded at constant P from 300 K to 360 K. Work˜
A) nR?T = 2×8.31×60 J
B) (3/2)nR?T
C) 0
D) nCp?T
#100 The SI unit of electric charge is
A) Coulomb
B) Ampere
C) Volt
D) Ohm
#101 The charge on an electron is
A) 1.6×10\(^{-19}\) C
B) 1.6×10\(^{-20}\) C
C) 1.6×10\(^{-21}\) C
D) 1.6×10\(^{-22}\) C
#102 The law of conservation of charge states that
A) Charge can be created
B) Charge can be destroyed
C) Charge can be transferred
D) The total charge in an isolated system remains constant
#103 Coulomb’s law states that the force between two point charges is
A) Directly proportional to the product of charges
B) Inversely proportional to the square of the distance
C) Both A and B
D) Neither A nor B
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