A mass is suspended vertically from a spring so it is at rest at the equilibrium position. The mass is pulled straight down to an extension x and released so that it oscillates about the equilibrium position. The acceleration of the mass is zero when the mass is
A. at its maximum upward travel.
B. at the equilibrium point.
C. at its maximum lower travel.
D. somewhere between the equilibrium point and maximum extension.
B. at the equilibrium point.
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Radioactive Decay: Isotope A has a decay constant of 0.723 s-1 and isotope B has a decay constant of 0.514 s-1. Which isotope has a longer half-life?
A. isotope A B. isotope B
The image of our galaxy in radio emission from CO, mapping the distribution of molecular clouds, is closest to the image of our galaxy in
A) 21-cm-line radio emission from atomic hydrogen. B) visible light, showing the edges of supernova bubbles. C) visible light, which is closest to how the night sky appears from Earth. D) X-rays from hot gas bubbles in the disk. E) infrared emission from interstellar dust grains.
The Fahrenheit scale has a ______________ degree size than the Celsius scale
Fill in the blank(s) with correct word
What is the acceleration of an object in free fall at Earth's surface?