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When an earthquake occurs, energy radiates in all directions from its source. the source is also referred to as the ________?
answered Jun 16, 2018
2 votes
198k views
Scientists believe ___ were the first types of cells able to make their own food.
answered Jun 7, 2018
2 votes
57.3k views
If a bike is traveling at 12 km/hr for 20 minutes how far will it travel
answered Aug 21, 2017
1 vote
103k views
A fish tank at a pet store has 10 goldfish. In how many different ways can Brian choose 3 goldfish to buy?
answered May 28, 2017
3 votes
94.2k views
16) How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy? A) 3.37 × 1019 photons B) 3.06 × 1030 photons C) 1.81 × 1024 photons D) 4.03 ×
answered Mar 29, 2017
6 votes
43.1k views
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