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When you exhale 4 l in five seconds through a trachea of 18 mm diameter, what is the pressure decrease due to Bernoulli's effect? The glottis is the space between the vocal cords, and its diameter can be controlled by muscles. What is the pressure difference if the glottis is closed down to a diameter of 2 mm?
A thin, 70.0g disk with a diameter of 7.50cm rotates about an axis through its center with 0.270J of kinetic energy
Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. Estimate the net force that ultimately stops the person
a particle with mass 2.30 g and charge 10.0 c enters through a small hole in a metal plate with a speed of 8.50 ms at
A 297 turn solenoid has a radius of 5.00 cm and a length of 20.0 cm. Find the inductance of the solenoid
Kim says that she was less than 10 ft away from the president when she took a picture of him with her 45-mm focal length camera lens. How close was Kim to the president when she took the picture
A 130kg mail bag hangs by a vertical rope 3.6mlong. A postal worker then displaces the bag to a position 2.2m sideways from its original position, What horizontal force is necessary to hold the bag in the new position
the volume of a gas is decreased by a constant external pressure of 0.200atm, changing from 2.10 litters to 0.58 litters. during this compression
Let's say you have a prescription for contacts of -2 diopters. Estimate how far you will be able to focus
A girl delivering newspapers covers her route by traveling 7.00 blocks west, 4.00 blocks north, and then 3.00 blocks east. What is her resultant displacement
During the spin cycle of your clothes washer, Find the angular displacement of the tub during a spin of 82.9 s
A man pushes a 37 kg lawn mower using a handle inclined 30.0 degrees from the horizontal. He pushes with 80 N directed along the handle. What's the normal force on the mower
A parallel plate capacitor has plates of area A and seperation of d and is charged to a potential difference of V.Derive expressions for the new potential difference
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