Which of the following molecules contains a ketone?

A) a
B) b
C) c
D) a or b
E) all of the above


Answer: A

Physics & Space Science

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A hypothetical star has a parallax of 0.05 arcseconds. How faraway is it?

a) 50 parsecs b) 10 parsecs c) 5 parsecs d) 0.05 parsecs e) 20 parsecs

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A series LRC circuit connected across an ac voltage source has minimum current flowing through the circuit when operating at the resonant frequency

Indicate whether the statement is true or false

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An unmarked resistor is being used in a circuit. To determine its resistance by making voltage and current measurements, one should connect

A. the voltmeter and ammeter in series with the resistor. B. the voltmeter and ammeter in parallel with the resistor. C. the voltmeter in parallel with the resistor, and the ammeter in series with the resistor. D. the voltmeter in series with the resistor, and the ammeter in parallel with the resistor.

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At the time of recombination, all of the Universe was about as hot as the core of the Sun.

Answer the following statement true (T) or false (F)

Physics & Space Science