A U-238 nucleus (mass = 238 units) decays, transforming into an alpha particle (mass = 4.00 units) and a residual thorium nucleus (mass = 234 units). If the uranium nucleus was at rest, and the alpha particle has a speed of 1.50 × 10^7 m/s, determine the recoil speed of the thorium nucleus
2.56 × 10^5 m/s
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Light of wavelength 600 nm in air goes into a medium where the index of refraction is 1.73. What is the frequency of this light in the medium?
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B. 
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The oldest known features of Mercury's surface formed:
A) about 4.6 billion years ago. B) about 3.9-3.2 billion years ago. C) just under 4 billion years ago. D) less than a billion years ago.
A body is oscillating up and down at the end of a spring. Let's consider when the body is at the top of its up-and-down motion.The net force on the body has its largest magnitude
a. True b. False Indicate whether the statement is true or false
Which of the terrestrial planets have the most similar atmospheric compositions?
A. Venus and Mars B. Mercury and Venus C. Earth and Mercury D. Earth and Venus E. Earth and Mars