Which statement is TRUE? Waves travel at different speeds through different materials.
Light waves and sound waves travel at the same constant speed.
Wave speed depends on the amplitude of the wave.
Light waves always travel at a constant speed, but sound waves do not.

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f