This famous photograph taken by the Voyager spacecraft shows
A) Earth as viewed from the outskirts of the solar system.
B) a close-up of the rings of Neptune.
C) the cloud of gas and dust in which our solar system was born.
D) the Sun as viewed from the next-nearest star.
A) Earth as viewed from the outskirts of the solar system.
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The longest wavelength of visible light is _____
A) 400 nanometers B) 500 nanometers C) 700 nanometers D) 900 nanometers
A 120 N traffic light is located at the midpoint of a cable between two poles. The cable makes and angle of 30
to the horizontal at each pole. What is the tension in the cable?
A. 60.0 N B. 90.0 N C. 140 N D. 110 N E. 120 N
What is the internal energy of 50 moles of neon gas (molecular mass = 20 u) at 20.0°C? (R = 8.31 J/mol/K)
a. 1.8E+5 J b. 8.1E+5 J c. 2.1E+3 J d. 1.2E+4 J e. It depends on the container size, which is not given.
A neutral atom has an electron configuration of 1s22s22p63s23p2. How many protons does it have in its nucleus?
A) 5 B) 11 C) 14 D) 20 E) 26