As you comb your hair, electrons are rubbed onto the comb, which becomes

A) negatively charged.
B) positively charged.
C) ionized.


Answer: A

Physics & Space Science

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The superposition of two waves ?      and      ? at the location x = 0 in space results in

A. beats at a beat frequency of 3 Hz. B. a pure tone at a frequency of 153 Hz. C. a pure tone at a frequency of 156 Hz. D. beats at a beat frequency of 6 Hz. E. beats at a frequency of 156 Hz.

Physics & Space Science

An object is dropped from a tall building. The net force acting on the object is the difference between the object's _________ and the force of air resistance

Fill in the blank(s) with correct word

Physics & Space Science

Which of the following characteristics are held in common by both gravitational and electrostatic forces when dealing with either point masses or charges?

a. potential energy is a function of distance of separation b. forces are conservative c. inverse square distance law applies d. all of the above choices are valid

Physics & Space Science

Which of the following is a prototype of a new class of objects defined by the International Astronomical Union (IAU) as dwarf planets?

A) Pluto B) Uranus C) Titan D) Triton

Physics & Space Science