Of the six layers of Earth, which is unique among the planets? Why?
What will be an ideal response?
The hydrosphere, since liquid water is found on the surface in abundance here only.
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Second Law of Thermodynamics: Which one of the following is a true statement?
A. The second law of thermodynamics is a consequence of the first law of thermodynamics. B. It is possible for heat to flow spontaneously from a hot body to a cold one or from a cold one to a hot one, depending on whether or not the process is reversible or irreversible. C. It is not possible to convert work entirely into heat. D. It is impossible to transfer heat from a cooler to a hotter body. E. All of these statements are false.
A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?
a. Bx is positive. b. Bz is positive. c. By is negative. d. By is positive. e. Bx is negative.
An atom that has more electrons than protons is a ______________ ion
a. neutral b. positive c. negative d. polyatomic
How many moons does earth have
A) none B) one C) two D) three E) four