How much energy is released when 1.40 ?g of 3H have decayed to 3He? The mass of 3He is 3.016029 u, the mass of 3H is 3.016049 u, and 1 u = 931.494 MeV/c2
A) 23,900 J B) 71,700 J C) 830 J D) 7970 J E) 11,900 J
C
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A mineral can be composed entirely of one element.
a. true b. false
Alpha Centauri A and B have an average orbital separation of about 23 AU and a period of about 80 years. Approximately what is the sum of their masses? If we presume that Alpha Centauri A is a star like our Sun, what is Alpha Centauri B's mass?
What will be an ideal response?
A researcher is investigating a cubic crystal with x rays. He is looking at Bragg reflection from the planes parallel to the cube faces
He finds that when using x rays of 0.165 nm a strong first maximum occurs when the beam makes an angle of 23.5° with the planes. What is the spacing of adjacent atoms in the crystal?
______________ is the only moon in the solar system to have retrograde motion
a. Ganymede b. Europa c. Callisto d. Titan e. Triton