Because electromagnetic radiation (EMR) of sufficient energy can excite electrons from stable orbitals, EMR is considered to travel in packets of energy called _________.
Fill in the blank(s) with the appropriate word(s).
photons
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A Mack truck and a Mini Cooper traveling at the same speed collide head-on. The vehicle to undergo the greatest change in velocity will be the
A) Mini Cooper. B) Mack truck. C) same
A stopping potential of 3.2 V is needed for radiation whose wavelength is 200 nm. What is the work function (in eV) of the material?
a. 4.0 b. 3.0 c. 5.0 d. 6.0 e. 2.0
Consider an LRC circuit. The impedance of the circuit increases if R increases. When is this statement true?
A) always true B) true only if XL is less than or equal to XC C) true only if XL is greater than or equal to XC D) true only if XL is equal to XC E) never true
An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two electrons is
A) 0.25 V. B) 0.5 V. C) 1 V. D) 2 V. E) 4 V.