A circuit joins points A, B, C and D into a single square loop. The voltage drop from A to B, B to C and C to D are -5.2V, 2.1V, and 1.0V, respectively. If one were to measure the voltage drop from C to B, one would obtain:

A. 2.1V
B. -4.1V
C. -6.1V
D. -2.1V
E. 4.1V
F. 6.1V


D. -2.1V

Physics & Space Science

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State the Equivalence of Physical Laws postulate of special relativity

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A supersonic plane passes overhead at a speed of 500 m/s. If you hear the sonic boom (shock wave) 4.00 s after the plane is directly overhead, at what altitude is the altitude the plane flying? Assume the speed of sound in air is 340 m/s

A) 1.36 km B) 2.16 km C) 1.85 km D) 2.45 km E) The plane is not flying fast enough to produce a shock wave.

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