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A uranium atom is ionized seven times, losing seven electrons in the process. Its resulting mass is 3.90×10?25 kg and it is given a kinetic energy of 3000 eV. If it circles in a magnetic field at a radius of 3.00 m, what is the strength of the magnetic field?
The air inside a bicycle tire pump has 172 joules of work done on it as 64.8 joules of heat is conducted away from it
A generator rotates at 88Hz in a magnetic field of 2.6×10?2T . It has 1200 turns and produces an rms voltage of 120V and an rms current of 57.0A, What is the area of each turn of the coil
A small omnidirectional stereo speaker produces waves in all directions that have an intensity of 8.50W/m2 at a distance of 4.00m from the speaker. At what rate does this speaker produce energy
A transformer with 1760 turns on the primary and 347 turns on the secondary is used in an electric slot car racing set to reduce the input voltage amplitude of 170 V from the wall output. What is the current amplitude in the primary coil
Two charged objects experience a mutual repulsive force of N. If the charge of one of the objects is reduced by a factor of and the distance separating the objects is increased by a factor of , what is the new force?
An empty capacitor is capable of storing 1.0 × 10-4 J of energy when connected to a certain battery. how much energy could this modified capacitor store
A sound wave from a siren has an intensity of 86.2 W/m2 at a certain point, compute the intensity level of the sound wave due to the ambulance
A ball is thrown at an angle of 30.9 degrees above the horizontal at a speed pf 8.77 m/s. What is the vertical component of the ball's velocity
On a touchdown attempt, a 95.0 kg running back runs toward the end zone at 3.75 m/s. What are the initial and final kinetic energies of the system
Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnit..
An ideal refrigerator does 160 J of work to remove 570 J of heat from its cold compartment during each cycle. What is the refrigerator's coefficient of performance
The equation of a transverse wave on a string is y = (2.0 mm) sin[ (20 m-1)x - (600 s-1)t)]. Find the linear density of this string in grams per meter
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