During an isothermal process, 5.0 J of thermal energy via the process of heating is removed from an ideal gas. What is the change in internal (thermal) energy of the gas?
A) 0 J
B) 2.5 J
C) 5.0 J
D) 10 J
A
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How many different nucleotide bases are used in nucleic acids in life on Earth (consider both DNA and RNA)?
A) 25 B) 4 C) 20 D) 5
A champion athlete can produce one horsepower (746 W) for a short period of time. If a 70-kg athlete were to bicycle to the summit of a 500-m high mountain while expending power at this rate, she would have used at least ____ J of energy.
A. 746 B. 3.43 × 105 C. 3.73 × 105 D. 7.46 × 105 E. 2.61 × 107
If we detected an Earth-like planet in the habitable zone around another star, how might we learn whether it harbored life?
What will be an ideal response?
The length and width of a standard sheet of paper is measured, and then the area is found by calculation to be 91.50 in.2 . The number of significant figures in the width measurement must be at least
a. 1. b. 2. c. 3. d. 4. e. 5.