Mercury's magnetic field is generated by the same dynamo effect as Earth's
Indicate whether the statement is true or false
FALSE
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A perfectly black sphere 18.0 cm in diameter is held at a temperature of 215°C
(? = 5.670 × 10-8 W/m2 ? K4, Wien displacement law constant is 2.90 × 10-3 m ? K, h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s) (a) Near what wavelength does this sphere radiate most strongly? (b) If all the radiated energy were at the wavelength found in part (a), how many photons would the sphere emit each second?
Deoxyribonucleic acid (DNA) is a messenger molecule
Indicate whether the statement is true or false
When 241Am decays by emitting an alpha particle of kinetic energy 5.49 MeV, what is the recoil energy of the daughter nucleus?
A. 5.49 MeV B. 1.27 MeV C. 0.880 MeV D. 0.0930 MeV E. 0.0910 MeV
The relationship 
for an elliptical orbit follows from the fact that the satellite’s velocity is perpendicular to its position vector at the two extreme points and also from
A. Conservation of angular momentum. B. Conservation of energy. C. Conservation of momentum. D. Newton’s second law. E. Some other properties of ellipses. F. (The given relationship is false!)