Write the nuclear notation for the following nuclei: Hydrogen-2, Sulfur-33, and Lead-207
What will be an ideal response?
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According to our present theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system?
A) The solid material that accreted in the outer solar system included ices, while the solid material of the inner solar system consisted only less abundant metal and rock. B) There was more time for accretion in the outer solar system before the solar wind cleared the nebula away. C) The gas in the outer solar system contained a larger proportion of rock, metal, and hydrogen compound than the gas in the inner solar system. D) Gravity was stronger in the outer solar system, allowing more solid material to collect.
A long hollow cylindrical conductor (inner radius = 2.0 mm, outer radius = 4.0 mm) carries a current of 24 A distributed uniformly across its cross section. A long wire which is coaxial with the cylinder carries an equal current in the opposite direction. What is the magnitude of the magnetic field 3.0 mm from the axis?
A. 0.82 mT B. 0.93 mT C. 0.70 mT D. 0.58 mT E. 0.40 mT
A person of mass 50 kg has a de Broglie wavelength of 4.4 × 10-36 m while jogging. How fast is she running? (h = 6.626 × 10-34 J ? s)
A) 2.0 m/s B) 3.0 m/s C) 4.0 m/s D) 5.0 m/s
What is the half-life of a radioactive element?
a. Half the amount of time it takes the element to decay. b. The amount of time in which half the quantity of the element will decay. c. One-half curie of the element. d. The inverse of the number of decays per second from a sample, expressed in units of time. e. Half of the amount of the element needed for decay to proceed.