The Sun makes most of its energy by the proton-proton cycle
a. True
b. False
Indicate whether the statement is true or false
True
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Concrete cubes at 60ºF are heated in a kiln which is at 400ºF and with a convective heat transfer coefficient of 5 Btu/hr?ft2?0F. Using thermal conductivity of 0.79 Btu/hr?ft?ºF, specific heat of 0.21 Btu/lbmºF, and thermal diffusivity of 8.3 x 10^-6 ft^2/s, determine the center temperature and the corner temperatures after 3 hours.
What will be an ideal response?
A single slit is illuminated at normal incidence with a parallel beam of light having a wavelength of The entire central band of the diffraction pattern is observed at ±90°
The illumination is now replaced by a nonrelativistic beam of electrons, each having a kinetic energy of 980 eV. When this beam hits the slit at normal incidence, at what angle will the first minimum of the electron diffraction pattern occur? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19 J) A) 0.095 mrad B) 0.071 mrad C) 0.046 mrad D) 0.12 mrad E) 0.14 mrad
Which one of the following is the correct electronic configuration for the sodium atom?
A) 1 s12 s23 p62 s2 B) 1 s22 s13 p62 s2 C) 1 s12 s22 p6 D) 1 s22 s22 p63 s2 E) 1 s22 s22 p63 s1
The solar neutrino problem was solved when it was discovered that neutrinos ________ during the time they take to reach the Earth
Fill in the blank(s) with correct word