In a ______________the atoms are in regular arrangements.
Fill in the blank(s) with the appropriate word(s).
crystal
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Kirchhoff's Rules: A multiloop circuit is shown in the figure. Find the emf ?1 if the batteries are ideal. (It is not necessary to solve the entire circuit.)
A. -4 V B. 4 V C. 44 V D. 52 V E. -52 V
Nuclear Fission and Fusion: If a 2.0-MeV neutron released in a fission reaction loses half its kinetic energy in each moderator collision, how many collisions are needed to reduce its kinetic energy to 1/25 eV?
A. 6 B. 18 C. 26 D. 30 E. 4
The stars found in nebulae like the Orion Nebula probably formed:
A) a few million years ago. B) about 10 million years ago. C) hundreds of millions of years ago. D) billions of years ago. E) at the beginning of the universe.
Concrete is sold by the cubic yard. What is the mass, in kilograms, of 1.00 cubic yard of concrete that is 5.00 times as dense as water? (1.00 m = 1.094 yd, a cubic meter of water has a mass of 1,000 kg, and density is mass per unit volume.)
A) 764 kg B) 6550 kg C) 2420 kg D) 8730 kg E) 3820 kg