Which of the objects below has an atmosphere consisting mostly of carbon dioxide?
a. Earth
b. Mercury
c. Earth's Moon
d. Venus
e. None of the other choices are correct.
d
RATIONALE: Note that the % composition of carbon dioxide is similar between Mars and Venus but Venus has one more percent.
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The heat of fusion for lead at 327.0 
22.9 kJ/kg and the specific heat of lead is 0.130 kJ/kg
What is the energy needed to melt 100 grams of lead starting at 0
?
A. 3.56 kJ B. 4.23 kJ C. 6.54 kJ D. 7.02 kJ E. 7.76 kJ
Through what potential difference must an electron (starting from rest) be accelerated if it is to reach a speed of 3.0 × 10^7 m/s?
a. 5.8 kV b. 2.6 kV c. 7.1 kV d. 8.6 kV e. 5.1 kV
How it is that Insull's apartment building allows more efficiency in the distribution and supply system?
What will be an ideal response?
Mars has two moons, Phobos and Deimos
a. True b. False Indicate whether the statement is true or false