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A small drop of water is suspended motionless in air by auniform electric field that is directed upward and has a magnitudeof 8500 N/C. The mass of the waterdrop is 3.20 10-9kg.
How many excess protons reside on the drop?
In a mass spectrometer, a singly charged ion having a particular velocity is selected by using a magnetic field of 0.1 T perpendicular to an electric field of 8.00 102 V/m. What is the mass of the ion
An Airbus A310 is initially moving down the runway at 4.5 m/s preparing for takeoff. The pilot pulls on the throttle so that the engines give the plane a constant acceleration of 1.6 m/s2
Forces of 11.0 N norths, 19.5 N east, and 15.90 N south are simultaneously applied to a 3.70 kg mass as it rests on an air table. What is the magnitude of its acceleration.
Use the virial theorem to derive the Bonnor-Ebert instability. Explain the physics of the Bonnor-Ebert instability in as much detail as possible.
A beam of electrons is first accelerated (from rest) through a region of electric potential difference V=10 keV and then made to go through a slit of width a. What is the value of the momentum (px) of each electron
A cubical piece of heat-shield tile from the space shuttle measures 0.11 m on a side and has a thermal conductivity of 0.059 J/(s m ·C°). How much heat flows from the outer to the inner surface of the tile in six minutes
A car traveling at 18 {rm m/s} runs out of gas while traveling up a 24.0^circ slope. How far up the hill will it coast before starting to roll back down.
A power line, running above the ground at the top of 8.0 m high poles, carries a current of 90 A. What is the magnitude of the magnetic field produced by this wire at the ground
The far point of a nearsighted person is 8.5 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
A box is dropped from the height of 2000 m. Find the time taken by the box to reach the ground
A charge +8.2 ?C is placed at the center of the hollow spherical conductor with the inner radius 3.3 cm and outer radius 5.0 cm. What is the total charge on the interior surface
A fireman 54.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 22.0° above the horizontal. at what height will the stream of water strike the building
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