The ground state is the lowest energy level in an atom
a. True
b. False
Indicate whether the statement is true or false
True
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Which of the following facilities are needed to produce a plutonium A-bomb?
A) enrichment plant B) nuclear reactor C) Both of the above. D) a fusion bomb E) All of the above.
The concept of entropy tells us how exothermic reactions are
A) favored over endothermic reactions. B) not as favorable as endothermic reactions. C) just as effective as endothermic reactions. D) the reverse of endothermic reactions.
Waves on a particular string travel with a velocity of 10 m/s. A high-speed photograph shows that successive peaks are 0.40 m apart along the string. The frequency of the waves is
A. 25 Hz. B. 15 Hz. C. 20 Hz. D. 5 Hz. E. 10 Hz.
An electric heater draws an average power of 1100 watts when plugged into a 110 V rms outlet. Calculate the resistance of the heater and the rms current.
A. 11 ?, 10 A (rms) B. 110 ?, 10 A (rms) C. 10 ?, 11 A (rms) D. 10 ?, 110 A (rms) E. 0.09 ?, 11 A (rms)