Which of the following observational techniques is most appropriate for measuring Doppler shifts?
A) spectroscopy (taking a spectrum)
B) imaging (taking a picture)
C) time monitoring (measuring how the amount of light changes with time)
A) spectroscopy (taking a spectrum)
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A(n)__________is a form of an atom with the same number of protons but a different number of neutrons
A) isotope B) ion C) molecule D) meteor
Cloud types associated with stable air include
A) cumulus and cumulonimbus. B) cirrostratus, altostratus, and stratus. C) cirrostratus, altocumulus, and altostratus. D) stratocumulus, stratus, and cirrostratus.
An aluminum electric tea kettle with a mass of 500 g is heated with a 500-W heating coil
How long will it take to change the temperature of 1.0 kg of water from 18°C to 98°C in the tea kettle? The specific heat of aluminum is 900 J/kg ? K and that of water is 4186 J/kg ? K. A) 5.0 minutes B) 7.0 minutes C) 12 minutes D) 15 minutes E) 18 minutes
Two very long parallel wires are a distance d apart and carry equal currents in opposite directions. The locations where the net magnetic field due to these currents is equal to zero are
A) midway between the wires. B) a distance d/2 to the left of the left wire and also a distance d/2 to the right of the right wire. C) a distance d to the left of the left wire and also a distance d to the right of the right wire. D) a distance d/ to the left of the left wire and also a distance d/ to the right of the right wire. E) The net field is not zero anywhere.