The energy needed to change a He+ ion in the ground state into a He2+ ion is
a. 13.6 eV
b. 54.4 eV
c. 112.4 eV
d. 92.9 eV
e. 27.2 eV
b
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Light of a wavelength of 661.1 nm is received from a star that is emitting light of a wavelength of 659.6 nm. How fast is the star moving relative to the earth and is it moving toward or away?
A. -580 km/s away B. 580 km/s away C. -680 km/s away D. 680 km/s away
Dwarf planets are very similar to
A) larger Jovian moons B) the Earth's moon C) smaller Jovian moons D) comets
On the Kelvin scale the temperature is proportional to the average kinetic energy of the atoms or molecules whose temperature is being measured
Indicate whether the statement is true or false
A candle is 32.0 cm in front of a convex spherical mirror of radius of curvature 68.0 cm. What are the image distance and the magnification, respectively?
a. –16.5 cm, + 0.515 b. –21.8 cm, – 1.94 c. –36.0 cm, + 0.242 d. –1.9 cm, + 1.94 e. 16.5 cm, – 0.515