The diagram exaggerates the sizes of Earth and the Sun relative to the orbit. If Earth were correctly scaled relative to the orbit in the figure, how big would it be?
A) about half the size shown
B) about 2 millimeters across
C) about 0.1 millimeter across
D) microscopic
D) microscopic
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In an energy diagram, what does the difference between the energy line and the potential energy line represent?
A. Change of thermal energy B. Energy leaving the system C. All of these are correct. D. Kinetic energy
A ______________ is an ultra-hot collection of electrically charged particles
a. gas b. liquid c. plasma d. solid
When an unstable O nucleus undergoes beta decay, the nucleus formed is that of
a. Oxygen. b. Neon. c. Nitrogen. d. Carbon. e. Fluorine.
What is special about the ratio distance traveled per unit of time?
A) it is constant for light B) it is relative to a frame of reference C) distance traveled very much depends on time