A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did the gravitational force exerted by Earth on the object do on the bucket during this process?
A) 180 J
B) 90 J
C) 45 J
D) 0 J
E) 900 J
D
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What is the energy required to remove the electron from a hydrogen atom in the n = 11 state?
A) 0.112 eV B) 1.24 eV C) 13.5 eV D) 12.4 eV E) 0.141 eV
Three moles of an ideal gas with a molar heat capacity at constant volume of 4.9 cal/(mol?K) and a molar heat capacity at constant pressure of 6.9 cal/(mol?K) starts at 300 K and is heated at constant pressure to 320 K,
then cooled at constant volume to its original temperature. How much heat flows into the gas during this two-step process? A) 710 cal B) -720 cal C) 0 cal D) 120 cal E) -120 cal
Most individual star names come from Latin and have been altered through passing centuries
a. True b. False Indicate whether the statement is true or false
Why is Earth's inner core solid?
A. due to the tremendous pressure of overlying material B. due to extremely high temperature C. due to the spinning of earth D. Earth formed by liquid material piling on top of a solid sphere.