An exerciser of mass 90.0 kg walks up a flight of stairs that are 12.0 meter high. What is the energy of the exercise in Calories?
A. 8.55
B. 7.32
C. 4.66
D. 2.53
E. 1.85
D. 2.53
Physics & Space Science
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The shortest day of the year for the Northern Hemisphere is December 21.
Indicate whether the statement is true or false.
Physics & Space Science
Water has its ________ density at 4.°C
A) average B) maximum C) minimum
Physics & Space Science
Molecular clouds are mapped using _____ gas instead of the most-abundant hydrogen because itradiates at radio wavelengths more efficiently
a. oxygen III b. oxygen II c. helium II d. carbon monoxide e. carbon dioxide
Physics & Space Science
What is the kinetic energy of a 0.135 kg baseball thrown at 40.0 m/s?
a. 54.0 J b. 87.0 J c. 108 J d. 216 J
Physics & Space Science