Only the energy of a nucleus, and not its identity, is changed when it undergoes ______________ decay
Fill in the blank(s) with correct word
gamma
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If the dark energy is described by the cosmological constant, then the _____ Universe is ____
a. open; accelerating and will not expand forever b. flat; decelerating and will expand forever c. closed; accelerating and will expand forever d. open;, decelerating and will expand forever e. flat; accelerating and will expand forever
Free Fall: A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant air resistance. If it takes the 20-kg rock a time T to reach the ground, what time will it take the 10-kg rock to reach the ground?
A. 4T B. 2T C. T D. T/2 E. T/4
Assume a gram of a substance marketed as "Pure Energy" is annihilated by a gram of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 109 watts of power?
A. 40 hrs B. 25 hrs C. 50 hrs D. 65 hrs E. 50000 hrs
Answer Question 3 using January as the date