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A hypodermic syringe has a plunger of area 2.5 cm2 and a 5.0 X10-3 cm2 needle.
a. If a 1.0-N force is applied to the plunger, what is the gauge pressure in the syringe's chamber?
b. If a small obstruction is at the end of the needle, what forcedoes the fluid exert on it?
c. If the blood pressure in a vein is 50 mm Hg, what force must beapplied on the plunger so that fluid can be injected into the vein?
The core of an optical fiber has an index of refraction of 1.27, What is the critical angle for total internal reflection at the core-cladding interface
A diver springs upward from a board that is three meters above thewater. At the instant she contacts the water her speed is9.00 m/s and her body makes an angleof 75.0° with respect to thehorizontal surface of the water. Determine her initial velocity..
If the inside of the vessel is maintained at atmospheric pressure 1.013 × 105 Pa, what is the net force on a porthole of diameter 16.9 cm
A 100 meter length of steel changes temperature by 30 C during the course of a day. If the coeffcient of thermal expansion of steel is 12 parts per million per C, what is the change in length of the steel
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axel through the center of the disk. the platform has a mass of 150 kg a radius of 2m and a rotational inertia of 30 kgm about the axis of ..
A syringe has an area of 0.7 cm2 at its barrel and then narrows down to an area of 0.15 mm2 at the needle end. If a force of 4.6 N is applied to the syringe, what is the force produced at the tip of the needle?
A satellite has a mass of 5555 kg and is in a circular orbit 4.20 105 m above the surface of a planet. What would be the true weight of the satellite if it were at rest on the planet's surface
An object, at the top of a very tall building, is released from rest and falls freely due to gravity. Neglect air resistance and compute distance covered by the object between times t1 = 5.5 s and t2 = 7.9 s after it is released.
a motor applies a constant tension of 2.5 kN to a cable passing over a pulley, find the work done by gravitaional force action on the crate
You have just landed on a planet. You take out a block of mass 245g , release it from rest from a height of 14.01m, What is the acceleration of gravity on this planet
A photon energy 500KeV undergoes Compton scattering from the proton that is initially at rest. (a) what is the recoil Kinetic energy of the proton in eV?
The stairs are 83 long and inclined at the angle of 31. If a player has a mass of 87, estimate his average power output on the way up. Overlook friction and air resistance.
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