Stars with ˜0.4-4 solar masses swell into giants when hydrogen is exhausted in their centers
a. True
b. False
Indicate whether the statement is true or false
True
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The restoring force of a spring is proportional to the displacement of the object at the end.
Indicate whether the statement is true or false.
The deviation from the way a compass needle points from the true north direction is the magnetic declination
Indicate whether the statement is true or false
What is the highest energy of a photon in the Balmer series?
A. 1.89 eV B. 3.40 eV C. 1.51 eV D. 0.94 eV E. 0.66 eV
Which of the following provides evidence for active volcanism on Venus today and in the past?
A) the direct observation of erupting volcanoes from orbit B) the presence of sulfuric acid clouds in the atmosphere C) the detection from orbit of elevated levels of infrared radiation from volcanic features on the surface D) Both B and C