What is the proper abbreviation for ‘kilohertz?'
a. kh
b. khz
c. Khz
d. KHz
e. kHz
e
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The tunneling current in an STM is _________dependent upon the negative of the gap between the tip and the specimen.
Fill in the blank(s) with the appropriate word(s).
A rocket is launched from the origin with an acceleration of 20.0 at an angle of 30.0 degrees above the horizontal. The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted. The rocket then falls with an acceleration of 9.80
downward. What is the maximum height?
A. 22.3 m B. 27.5 m C. 30.5 m D. 36.7 m E. 20.0 m
A simple pendulum and a mass oscillating on an ideal spring both have period T in an elevator at rest. If the elevator now accelerates downward uniformly at 2 m/s2, what is true about the periods of these two systems?
A) Both periods would remain the same. B) Both periods would increase. C) Both periods would decrease. D) The period of the pendulum would increase but the period of the spring would stay the same. E) The period of the pendulum would decrease but the period of the spring would stay the same.
If I = 0.40 A in the circuit segment shown below, what is the potential difference Va ? Vb?
a.
31 V
b.
28 V
c.
25 V
d.
34 V
e.
10 V