For a medium to transmit a wave, the medium must

a. reflect the wave
b. absorb the wave completely
c. allow light to pass but not sound
d. permit the wave to travel through it

Alightning strike consists of charge moving from a cloud to the ground . in one particular case, the electrons in a lightning strike are confined to travel within a radius of 1.5 m and to move at a speed of 5.0 x 10 m/s. if the density of electrons in the strike is 10'15 electrons/m what current is carried by the lightning ?

While listening to operatic solos, musicians process the lyrics and the tunes in separate brain areas. this most clearly illustrates the functioning of different

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging