Process of Science: How we can test that a so-called "standard candle" is indeed standard?
What will be an ideal response?
We have to measure both the absolute luminosity of many examples of a standard candle through observations of their apparent brightness and independent measures of their distance. Only once absolute luminosities are fully calibrated in this way, can we then reverse the process and use their apparent brightness to infer distances.
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Parallel Wires: An object is hung using a metal spring. If now a current is passed through the spring, what will happen to this system?
A. The spring will contract, raising the weight. B. The spring will extend, lowering the weight. C. The weight will not move. D. The spring will begin to swing like a pendulum. E. None of these are true.
The ________ spitting of the spectral lines is due to a strong magnetic field present
Fill in the blank(s) with correct word
Falsifying a theory: The steady state universe was an alternate hypothesis to the Big Bang. Summarize this hypothesis, and explain the two observations which disproved it
What will be an ideal response?
Pierre performs a maneuver with his yo-yo called "around the world", where he swings the yo-yo in a vertical circle. When the yo-yo is at its highest point, which forces provide the centripetal acceleration?
a. friction b. gravity c. normal force d. tension e. Two of the above choices are correct.