In beta minus decay, the number of protons in the nucleus is
A) decreased by 1.
B) decreased by 2.
C) increased by 1.
D) increased by 2.
E) remains unchanged.
C
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Uncertainty Principle Using Momentum and Position: Suppose that the speed of an electron traveling 2.0 km/s is known to an accuracy of 1 part in 105 (i.e., within 0.0010%). What is the least possible uncertainty within which we can determine the position of this electron? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 2.0 mm B. 5.8 mm C. 14 mm D. 14 cm E. 8.5 nm
What happens when an interstellar cloud fragment shrinks?
A) It first becomes opaque. B) Density rises. C) Temperature rises. D) Pressure rises. E) All of the above.
A car travels along east and its velocity decreases. The acceleration of the car is in which of the following directions?
A) Eastward B) Westward C) Northward D) Southward E) Cannot be determined without additional information.
In an AC series circuit the capacitive reactance is 217 ? and frequency is 56 Hz. What is the capacitance?
a. 2.62E–5 F b. 8.23E–5 F c. 1.31E–5 F d. 1.85E–5 F e. 3.71E–5 F