Although an increased use of accessory ventilatory muscles coupled with rapid, shallow breathing may signal impending diaphragmatic fatigue, which of the following signs is typically seen in critically ill patients with ventilatory failure and diaphragmatic fatigue?
Read DetailsA tetherball spinning around a pole is shown in the figure. The ball has a tangential velocity of vT. The rope that ties the ball to the top of the pole makes an angle of q with the vertical. There is a tension, T, applied to the ball by the rope, and the ball has weight, W. Four different free body diagrams (excluding the acceleration) are shown for this system. Choose which one is correct. The letter A, B, C, or D is indicated inside the drawing of the ball. . . . .
Read DetailsA platinum wire is used to determine the melting point of indium. The resistance of the platinum wire is 2 Ω at 20°C and increases to 3.072 Ω as indium starts to melt. What is the melting point of indium? (The temperature coefficient of resistivity for platinum is 3.9 × 10-3 (°C)-1)
Read DetailsA charged particle of mass 2 g is subjected to a 6 T magnetic field which acts at a right angle to its motion. If the particle moves in a circle of radius 20 cm at a speed of 5 m/s, what is the magnitude of the charge on the particle?
Read DetailsThe drawing shows four situations in which a positively charged particle is moving with a velocity v→{“version”:”1.1″,”math”:”v→”} through a magnetic field B→{“version”:”1.1″,”math”:”B→”}. In each case, the magnetic field is directed out of the page toward you, and the velocity is directed to the right. In only one of these drawings is the magnetic force F→{“version”:”1.1″,”math”:”F→”} physically reasonable. Which drawing is it?
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