Una jeringa hipodérmica tiene un émbolo con una área transversal de 2.5 cm2

y una aguja de 5.0 x 103
cm2
. a) Si se
aplica una fuerza de 1.0 N al émbolo, ¿qué presión manométrica habrá en la cámara de la jeringa? b) Si hay una pequeña
obstrucción en la punta de la aguja, ¿qué fuerza ejercerá el fluido sobre ella? c) Si la presión sanguínea en una vena es
de 50 mm Hg, ¿qué fuerza deberá aplicarse al émbolo para inyectar fluido en la vena?

Contains chemical energy. a. heat b. light c. natural gas

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.

Difference between natural and artifical magnet