Author Question: A material is a good conductor because it A) has numerous free electrons. B) has ... (Read 53 times)

drink · **on:** Jul 29, 2018

A material is a good conductor because it

A)

has numerous free electrons.
B)

has unattached protons.
C)

is not an insulator.
D)

is an insulator.
E)

is a metal.

Question 2

A 60-W bulb is operating at an efficiency of 6.20. What is the number of photons per second given off by the bulb assuming the wavelength of light to be 580 nm?

A)

5.42 1018 photons/s
B)

10.8 1018 photons/s
C)

16.2 1018 photons/s
D)

21.7 1018 photons/s
E)

25.3 1018 photons/s