The point in the phase diagram where the vapor pressure curve ends is called the
A) critical point.
B) triple point.
C) melting point.
D) boiling point.
E) double point.
A
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A hypothetical planet has a mass of one-half that of the earth and a radius of twice that of the earth. What is the free-fall acceleration on the planet in terms of g, the free-fall acceleration at the surface of the earth?
A) g B) g/2 C) g/4 D) g/8 E) g/16
A. +x direction B. -x direction C. +y direction D. -y direction E. +z direction F. -z direction T. The field is zero.
Wien's Law: What is the wavelength of the most intense light emitted by a giant star of surface temperature 5000 K? The constant in Wien's law is 0.00290 m ? K.
A. 576 nm B. 578 nm C. 580 nm D. 582 nm
In the Northern Hemisphere, winter shadows are longer because ________.
A. the Sun moves through the sky closer to the horizon B. the Sun is in the sky for a longer period of time C. the Sun is in the sky for a shorter period of time D. the Sun moves through the sky farther from the horizon E. None of these choices is correct.