An analytical laboratory balance typically measures mass to the nearest 0.1 mg.
What energy change would accompany the loss of 0.1 mg in mass?
A) 9 x 10³ J
B) 9 x 10⁶ J
C) 9 x 10⁹ J
D) 9 x 10¹² J
Chemistry question, please help?
2017-10-24 12:58 am
回答 (2)
2017-10-24 1:23 am
1 mg = 10⁻⁶ kg
Energy change, E
= m c²
= (0.1 mg) × (3 × 10⁸ m/s)²
= (0.1 × 10⁻⁶ kg) × (3 × 10⁸ m/s)²
= 9 × 10⁹ J
The answer: C) 9 × 10⁹ J
Energy change, E
= m c²
= (0.1 mg) × (3 × 10⁸ m/s)²
= (0.1 × 10⁻⁶ kg) × (3 × 10⁸ m/s)²
= 9 × 10⁹ J
The answer: C) 9 × 10⁹ J
2017-10-24 1:22 am
E = mc^2
m is mass in kg
m is mass in kg
收錄日期: 2021-04-18 17:57:05
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