In nickel-silver copper alloys, the major alloy elements are nickel and _________.
Fill in the blank(s) with the appropriate word(s).
zinc
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The spring tides occur during the new and full lunar phases
Indicate whether the statement is true or false
First Law of Thermodynamics: An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat. What is the change in the internal (thermal) energy of the athlete?
A. -225 kJ B. -1075 kJ C. 1075 kJ D. 225 kJ E. 276 kJ
What is the common name for pyrite (FeS2)?
A rock is dropped from a vertical cliff. The rock takes 3.00 s to reach the ground below the cliff. A second rock is thrown vertically from the cliff. It takes 2.00 s to reach the ground below the cliff from the time it is released. With what velocity was the second rock released?
A) 4.76 m/s upward B) 5.51 m/s downward C) 12.3 m/s upward D) 4.76 m/s downward E) 12.3 m/s downward