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A certain lightbulb filament when hot has a resistance of205 Ω. The potential difference across the filament at acertain instant is standard household voltage, 120 V. (a) What current is flowing through the bulb at that time? (b) If the filament of the bulb is a tungsten wire having a radius of475 μm, what is the magnitude of the currentdensity in the filament?
A cubic block of lead alloy 0.1m on a side is placed in a bucket of mercury. What is the magnitude of the buoyant force
During a front-end car collision from 46.5 km/h and with air bags inflated, the acceleration limit for the chest is 60g as the car comes to rest. What force in newtons does the air bag exert on the chest of a 75.5 kg person
Sound travels at a speed of about 344 m/s in air. You see a distant flash of lighting and hear the thunder arrive 7.6 seconds later. How many miles away was the lighting strike
A fellow student of mathematical bent tells you that the wave function of a traveling wave on a thin rope isy(x,t)= 2.10mm cos[( 6.96rad/m )x+( 744rad/s )t]. Determine the average power transmitted by the wave
A narrow beam of sodium yellow light with wavelength 589 nm in vacuum, Determine the wavelength of the light in water
Consider a particle of mass m contrained to lie on the surface of a cone with it's vertex pointing down and half angle alpha. write the equations of constraint
A wheel has a rotational moment of inertia I=150. It is accelerated by a constant torque from rest to a final angular velocity of 1.0. what is the value of the torque applied
Marisa does 3.2J of work to lower the window shade in herbedroom a distance of 8.0m. How much force must Marissa exert onthe window shade
The power capacity of all nuclear power plants in the United States is 1.01 × 105 MW. In one hour, what is the total change in the mass of the nuclear fuel
While on vacation you rent a moped and go cruising around a tropical island. If you take a 10.0° banked curve with a radius of 15.0 meters at 12.0 m/s, what is the minimum coefficient of static friction between your tires and road to keep the tires f..
Joey, whose mass is 37kg , stands at rest at the outer edge of the frictionless 250kg merry-go-round, 1.9m from its center. The merry-go-round is also at rest. What is the final angular speed of the merry-go-round
A uniform thin rod of mass 4.19 kg pivots about an axis through its center and perpendicular to its length. What must the length of the rod be so that the moment of inertia of the three-body system with respect to the described axis is 0.977 kg·m2
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