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How is the direction of an electric field defined? andHow is the strength of an electric field indicated withelectric field lines?
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the line of longest wavelength
An object of mass m moves in a circle of radius R under the influence of a force of magnitude F.
1 how long does it take a plane traveling at a constant speed of 160 ms to fly once around a circle whose radius is
A certain atom of has 89 protons. Assume that the nucleus is a sphere with radius 7.25 fm, find the magnitude of the electric field produced by the protons
suppose the gas in a hot air balloon has density 0.800 kgm3. what volume must the balloon exceed in order to lift a
The steel E string of a violin is under a tension of 46.0 N. The diameter of the string is 0.170 mm and the length under tension is 35.0 cm. Find the unstretched length of this string and the work needed to stretch the string. (Give your answers with..
write a two to three page paper in which you1.provide at least three reasons for believing in the accuracy or
A gas is compressed at a constant pressure of 0.800 atm from9.00 L to 2.00 L. In the process,400 J of energy leaves the gas by heat. What would be the change in its internal energy
a piece of balsa wood with density 0.12gcm3 with mass of 30g in air is affixed to alead sinker with a mass of 400g.
If a 25-gram bullet with a speed of 330 m/s travels 15 cm into a tree before stopping, what's the average force exerted to stop the bullet
you have a compound microscope with a barrel of length 161 mm. the focal lengths of the objective and the eyepiece are
Two balls attached to strings have the same mass and volume, but are made of different materials. Which ball exerts a greater net force on the block
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