Ninety percent of all stars fuse helium to form carbon and lie on the main sequence
Indicate whether the statement is true or false
F
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What is the very first step of the scientific method? a. Design an experiment. b. Form a hypothesis
c. Analyze results. d. Generate a conclusion. e. Perform an experiment.
Impedance: A 120-V rms voltage at 1.00 kHz is applied to a resistor and an inductor in series. If the impedance of this circuit is 110 ?, what is the maximum value of the current?
A. 1.54 A B. 1.09 A C. 1.84 A D. 1.04 A
What is thought to lie at the center of Jupiter?
A) a hot sea of liquid metallic hydrogen B) gaseous hydrogen and helium, for Jupiter is not differentiated like Earth C) a fusion core like the Sun's, with hydrogen being turned into helium D) a solid core of crystalline helium E) a massive core of rocky materials with some iron mixed in
A beam of white light in air passes through the transparent object shown. Dispersion is observed to occur. From the diagram we can tell that
A. the object behaves as a concave mirror. B. the object acts as a converging lens. C. the index of refraction is larger for blue light than red. D. the index of refraction is larger for red light than blue.