The most accurate way of finding the distance to some very far away stars might be by observing
A. the rate of variation in their luminosity.
B. their motion relative to nearby stars.
C. their orbiting planets.
D. the variation in their position in the night sky on successive nights.
Answer: A
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If two benzene rings are linked by an oxygen atom it is an _________linkage.
Fill in the blank(s) with the appropriate word(s).
An object rests on an inclined surface. If the inclination of the surface is made steeper, what does the normal force on the object do?
A) increase B) decrease C) stays the same D) The normal force is zero N. E) Cannot be determined without additional information.
A 3.00 m organ pipe is open at both ends and contains air. The velocity of sound in air is 331 m/s. What is the frequency of the lowest frequency mode?
A. 39.5 Hz B. 40.2 Hz C. 43.1 Hz D. 47.5 Hz E. 55.2 Hz
In nuclear fission, (more/less) massive and (higher/lower) atomic number elements on the periodic table are broken into smaller and less massive nuclei. In nuclear fusion, (more/less) massive and (higher/lower) atomic number elements on the periodic table are fused into larger are more massive nuclei
What will be an ideal response?