Elliptical galaxies contain a mix of old and young stars
a. True
b. False
Indicate whether the statement is true or false
False
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An electromagnetic wave with a peak magnetic field component of 1.59 × 10^?7 T has an associated peak electric field component of what value? (?0 = 4? × 10^?7 T?m/A, ?0 = 8.85 × 10^?12 C2/N?m2 and c = 3.00 × 10^8 m/s)
a. 2.10E–2 N/C b. 5.30E–9 N/C c. 4.77E+1 N/C d. 1.89E+8 N/C e. 5.99E–6 N/C
Intensity of Sound: A barking dog delivers about 1.0 mW of power, which is assumed to be uniformly distributed in all directions. What is the intensity level in decibels at a distance 5.00 m from the dog? The threshold of human hearing is 1.0 × 10-12 W/m2.
A. 61 dB B. 63 dB C. 65 dB D. 68 dB
The part of a shadow where only a fraction of the Sun is blocked is called
What will be an ideal response?
In a certain process a gas ends in its original thermodynamic state. Of the following, which is possible as the net result of the process?
A. It is adiabatic and the gas does 50 J of work B. The gas does no work but absorbs 50 J of energy as heat C. The gas does no work but loses 50 J of energy as heat D. The gas loses 50 J of energy as heat and does 50 J of work E. The gas absorbs 50 J of energy as heat and does 50 J of work