Physics, 22.05.2020 02:02 oofoofoof1
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?
Answers: 2
Physics, 22.06.2019 00:30
Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.
Answers: 2
Physics, 22.06.2019 05:00
Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.
Answers: 1
Physics, 22.06.2019 05:50
Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.
Answers: 2
Physics, 22.06.2019 07:00
Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.
Answers: 3
Una jeringa hipodérmica tiene un émbolo con una área transversal de 2.5 cm2
y una aguja...
y una aguja...
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