What is the energy released for the reaction where the products are 0.0051 u less than the reactants? (1 u = 931.5 MeV/c2)
a. 7.6 MeV b. 5.2 MeV
c. 4.8 MeV d. 8.5 MeV
c
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Which is true about cold dark matter?
a) Cold dark matter interacts strongly with ordinary baryonic matter via the strong force. b) Cold dark matter particles travel faster than the speed of light. c) Cold dark matter particles travel more slowly than hot dark matter particles. d) Cold dark matter exists only within planets and stars but not in other parts of galaxiesor intergalactic space. e) Cold dark matter emits X-rays, but no other forms of radiation.
How do we believe the Barringer crater formed?
What will be an ideal response?
A certain utility transformer is designed to step up the emf from 1 kV to 25 kV. If the primary has 1000 turns of wire, how many turns of wire does the secondary have?
A. 25,000 B. 4000 C. 2500 D. 40 E. 25 F. Some other result (specify). T. One needs more information to answer.
The enclosed mass M( A) concentrated in the center
B) spread out over a large range of radii
C) distributed like a doughnut, with a hole in the center