Huygen’s principle relates to:

A reduction of intensity to one half its original value is _________ dB.

A sound wave leaves the transducer, travels through blood with a speed of 1560 m/s.  One second later the returning echo is received by the transducer. What was the depth of the reflector?

The intensity of a beam is 50 mW/cm2.It is increased by 3 dB. What is the new intensity?

During reception, timing delays of the electrical signals are used to increase image quality.  What is this called?

In a transverse wave, particles move in a direction perpendicular to the direction that the wave propagates.

As sound travels through the body, the amplitude ____________ .

If 1.00 mole of PCl3 and 1.00 mole of Cl2 are placed in a 2.00-L container, the following equilibrium is reached. PCl3 (g) + Cl2 (g) ⇌ PCl5 (g) Kc = 20.0 at the temperature maintained. What is the equilibrium concentration of ?

The area imaged on the surface by a sensor in a satellite is referred to as _______.

The _____, also known as straight set wrap, is a wrapping pattern in which all the rods within a panel move in the same direction and are positioned on equal-sized bases.