Classify each statement below as an observation or as an inference based on the current big bang model. (note that the helium abundance is defined as the mass of helium relative to the mass of hydrogen.)
1. photons of the cosmic microwave background have traveled through space for almost 14 billion years.
2. the cosmic microwave background is radiation left over from the big bang.
3. large-scale structures look about the same in all directions.
4. the temperature of the cosmic microwave background varies slightly with direction.
5. the cosmic microwave background temperature is 2.73 k.
6. the helium abundance is at least 25% in every galaxy studied so far.
7. fusion during the universe's first five minutes produced 75% hydrogen and 25% helium.
8. large-scale structure grew around density variations present in the early universe.
Answers: 1
Physics, 22.06.2019 16:00, postorivofarms
The process of predicting values that extend beyond the range of data points is called absolute value extrapolation interpolation prediction for any given: )
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Physics, 22.06.2019 16:30, xxaurorabluexx
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
Answers: 1
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