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Two infinitely long, straight wires are charged uniformly with C/m. One runs along the x axis and one runs along the y axis. Make a sketch of the electric field lines in the xy plane. Discover an expression for the electric field E~ at any point in the xy plane as a function of x and y.
A 4.0-kg rock is dropped from a height of 21.0 m. At what height is the rock's kinetic energy twice its potential energy? ?? m A cylinder of gas is at room temperature (20°C). The air conditioner breaks down, and the temperature rises to 49°C. Wha..
An object has a kinetic energy of 310 J and a momentum of magnitude 22.1 kg · m/s. Find the mass of the object
An electron with kinetic energy 3.90 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 12.0 cm. find the frequency of circling
Four identical charges (+3.0µ C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A jet boat pumps high-velocity water horizontally out the rear to provide forward thrust. A 1500-lb jet boat pumps 25.0 gal/s of water while traveling at 30.00 mph. The water exits the rear of the boat with a velocity of 70 mph.
It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm; the calculation is similar. A person's leg measures 39 cm between the knee and the hip, with an average leg diamete..
A camber carriers her drinks in an ice chest made of styrofoam. The chest is 40 cm x 45 cm x 70 cm, and the walls and lid are 2.5 cm thick. What is the rate of heat flow through the walls of the box
a large storage tank open to the atmosphere at the top and filled with water develops a small hole in its side at a
question a box sits on a horizontal wooden board. the coefficient of static friction between the box and the board is
What is the angle of total internal reflection (critical angle) for a glass-to-water interface
If a visible photon with wavelength 434 nm is emitted from an atom in a hydrogen gas lamp, what energy state was the atom in before the photon was emitted? That is, what was the number for that state?
What will be the speed if the string is replaced by one made of the same material and under the same tension however having twice the radius? (Answer in m/s)
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