A 1 cm long section of a blood vessel has a constriction that reduces the inner diameter from 4 mm at the entrance to 2 mm at the exit. Ignore the effect of gravity and assume that viscosity is negligible. Compared to the pressure at the entrance the pressure at the exit is: Group of answer choices lower higher or lower depending on blood ma

A 1 cm long section of a blood vessel has a constriction that reduces the inner diameter from 4 mm at the entrance to 2 mm at the exit. Ignore the effect of gravity and assume that viscosity is negligible. Compared to the pressure at the entrance the pressure at the exit is: Group of answer choices lower higher or lower depending on blood ma

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There is a maximum depth at which a diver can breathe through a snorkel tube because as the depth increases, so does the pressure difference, which tends to collapse the diver’s lungs. Since the snorkel connects the air in the lungs to the atmosphere at the surface, the pressure inside the lungs is atmospheric pressure. What is the external–internal pressure difference when the diver’s lungs are at a depth of 6.1 m (about 20 ft)? Assume that the diver is in freshwater. (A scuba diver breathing from compressed air tanks can operate at greater depths than can a snorkeler, since the pressure of the air inside the scuba diver’s lungs increases to match the external pressure of the water.)
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A 1.50 mL syringe has an inner diameter of 5.50 mm, a needle inner diameter of 0.230 mm, and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. What is the minimum force the nurse needs to apply to the syringe? The nurse empties the syringe in 2.10 s. What is the flow speed of the medicine through the needle?
An ambu (artificial manual breathing unit) device is connected to a patient. Ambu and lungs of the patient are formed a closed system. The pressure value of the closed system PI = 755mmHg, the initial volume of lungs is VL=5L. The initial volume of ambu is VA=1L. Ambu is manually controlled and when it is squeezed to 50% of its initial volume the lungs volume is increased by AV. AV= 582 mL. What will be pressure value (in terms of mmHg) of the closed system after the ambu is squeezed? (PS=?)
A box has a length of 1.3 cm, a width of 6.4 cm, and a height of 3.2 cm. Its mass is 9.8 kg. The box sits at rest on a horizontal floor. What is the pressure of the box on the floor?
Under normal circumstances, the vitreous humor, a jelly-like substance in the main part of the eye, exerts a pressure of up to 24 mmmm of mercury that maintains the shape of the eye. If blockage of the drainage duct for aqueous humor causes this pressure to increase to about 50 mm of mercury, the condition is called glaucoma. What is the increase in the total force (in newtons) on the walls of the eye if the pressure increases from 24 mm to 50 mm of mercury? We can quite accurately model the eye as a sphere 2.2 cm in diameter. Express your answer in newtons.
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