Energy is transferred by waves
a) in the same direction as the propagation of the wave
itself
b) only if the waves are in resonance with each other.
c) only when the waves propagate through a physical
material.
d) only if the waves are longitudinal.
a
You might also like to view...
Two very long parallel wires carry currents in the positive x direction. One wire (current = 15 A) is coincident with the x axis. The other wire (current = 50 A) passes through the point (0, 4.0 mm, 0). What is the magnitude of the magnetic field at the point (0, 0, 3.0 mm)?
A. 3.8 mT B. 2.7 mT C. 2.9 mT D. 3.0 mT E. 0.6 mT
What is the source of the energy the Sun radiates to us?
A) chemical reactions B) nuclear fission reactions C) nuclear fusion reactions D) magnetic explosions E) cosmic rays
A 1.8-kg block is projected up a rough 10° inclined plane. As the block slides up the incline, its acceleration is 3.8 m/s2 down the incline. What is the magnitude of the force of friction acting on the block?
a. 5.0 N b. 3.8 N c. 4.2 N d. 4.6 N e. 6.5 N
The electron orbiting the proton in the hydrogen atom is at a distance of 
m. What is the magnitude of the electric force between the proton and the electron?
a. 
b. 
c. 
d. 
e. 