Matt made a list of materials that conduct heat and electricity he noted that most materials that conduct heat also conduct electricity Matt concluded that only metals conduct both heat and electricity how would you respond to Matt's conclusion? A) Matt is correct; only metals conduct both heat and electricity.
B) Matt is correct even though he did not test many objects; all metals behave alike.
C) Matt should have tested more objects. There are other objects that conduct heat but not electricity.
D) Matt should have tested more substances. There are other substances that conduct heat and electricity.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

Which component of the earth’s atmosphere is decreased due to photosynthesis?