Which of the following statements best describes the idea behind the Gas Chromatograph/Mass Spectrometer Experiment on board the Viking landers?
A) soil with living organisms in it should contain organic molecules
B) radioactive gases should be produced when radioactive nutrients are added to a soil sample
C) living organisms in the soil should incorporate carbon from atmospheric gases
D) living organisms in the soil should give off gases when they metabolize nutrients
A
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Two in phase coherent sources emitting harmonic waves of wavelength ? are separated by a distance d
What is the minimum non-zero value of d for which constructive interference occurs everywhere along the line that passes through the locations of the two sources? A) ?/4 B) ? C) 2? D) ?/2 E) 4?
A 50. ? resistor is placed in series with a 40. mH inductor. At what frequency will the current in such a circuit lag the applied voltage by exactly 45°?
What will be an ideal response?
A 10-V battery is connected to a 15-? resistor and an unknown resistor R, as shown. The current in the circuit is 0.40 A. How much heat is produced in the 15-? resistor in 2.0 min?
A. 0.40 kJ B. 0.19 kJ C. 0.29 kJ D. 0.72 kJ E. 0.80 kJ
Which condition of motion must be met with regard to a charged particle if it is in the process of emitting electromagnetic radiation?
a. accelerates b. moves at the speed of light c. moves at constant velocity d. moves parallel to a uniform magnetic field