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Currents during lightning strikes can be up to 50000 Amp (or more!). We can model such a strike as a 48500 Amp vertical current perpendicular to the earth's magnetic field, which is about 1/2 gauss. Determine what is the force on each meter of this current due to the earth's magnetic field?
question1three identical 3.60 masses are hung by three identical springs. each spring has a force constant of 4.90 and
A fixed 0.15 kg solid-disk pulley with a radius of 0.060 m is acted on by a net torque of 5.4 m�·N. What is the angular acceleration of the pulley
50.0g hard-boiled egg moves on the end of a spring with force constant k = 25.0 N/m. Its initial displacement is .300m. A damping force F_x = bv_x acts on the egg, Calculate the speed of the egg
A system consisting entirely of electrons and alpha particles has a net charge of 1.84*10^-15C and a net mass of 4.56*10^-23 kg. How many electrons and alpha particles are in this system?
a uniform rod of mass m and length l can pivot freely about a hinge attached to a wall, compute the angular acceleration of the rod
The mass of Pluto was not known until 1978 when a moon of Pluto was finally discovered. How did the discovery of this moon help
An aluminum cup contains 225 gram of water and a 40 gram copper stirrer, all at 27°C. Compute what the mass of the aluminum cup
A particle of mass 0.350 kg is attached to the 100-cm mark of a meterstick of mass 0.125 kg. Calculate the angular momentum of the system when the stick is pivoted about an axis perpendicular to the table through the 50.0-cm mark
Two plates of area 30.0 cm2 are separated by a distance of 0.0150 cm. calculate the potential difference (voltage) between the two plates
A worker pushing a 35.0-kg wooden crate at a constant speed for 11.5 m along a wood floor does 320 J of work applying a constant horizontal force of magnitude F0 on the crate. (a) Determine the value of F0. (b) If the worker now applies a force great..
A rectangular plate is rotating with a constant angular speed aboutan axis that passes perpendicularly through one corner, as thedrawing shows. The centripetal acceleration measured atcorner A is n times as greatas that measured at corner B.
nichrome wire of cross-sectional radius 0.786 mm is to be used in winding a heating coil. if the coil must carry a
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