A lens surface that is __________ bulges outward from the lens, while a lens surface that is __________ is depressed into the lens.
Answer(s): C
A lens surface that is convex bulges outward from the lens, while a lens surface that is concave is depressed into the lens.
Electrons have a __________ charge.
Answer(s): B
Electrons have a negative charge.
The four forces that act on an aircraft in flight are __________.
The four forces that act on an aircraft in flight are lift, gravity, thrust, and drag.
The particle with a __________ charge in the nucleus of an atom is a(n) __________.
The particle with a positive charge in the nucleus of an atom is a proton. The nucleus of an atom contains protons, (which have a positive electrical charge) and neutrons, (which have no electrical charge).Electrons, which have a negative charge, circle the nucleus in what is known as the orbital shell.
What is the scientific notation for 832,000?
Answer(s): D
To express a number in scientific notation, you move the decimal as many places as necessary until there is only one digit to the left of the decimal. For 832,000, you move the decimal to the left by 5 decimal places.
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