A 5.0 MHz ultrasound beam is used to measure blood flow in a vein. The reflected sound returns with a frequency shift of 3.2 kHz. The ultrasound beam makes a 60° angle with the direction of blood flow. The speed of sound in soft tissue is 1540 m/s. What is the velocity of the red blood cells?

True or False: the conjugate base of H2O is O2-.

True or False: if the isotope below contains 13 protons, it must contain 14 neutrons. 27Al

Which of the following type of emitted radiation is a positively-charged particle with a negligible mass?

Decrease blood pressure; usually taken orally to reduce chronic hypertension, although some may be given intravenously in an emergency.

A rock concert with intensity 3.7 × 10⁻¹ W/m² has a sound level of approximately

Manage symptoms of rheumatoid arthritis (pain and swelling), slow joint destruction, and preserve joint function:

True or False: a solution that comprises 7.11 x 10-8 M H3O+ and 1.41 x 10-7 M HO- is considered basic.

True or False: if the isotope below contains 27 protons, it must contain 27 neutrons. 60Co

True or False: a solution that comprises 1.00 x 10-7 M H3O+ and 1.00 x 10-7 M HO- is considered basic.