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What force must be applied to push a carton weighing190 newtons up a 11° incline, if the coefficient of kineticfriction is 0.5. Assume the force is applied parallel to the incline and the velocity is constant.
An energy-efficient lightbulb, taking in 23.0 W of power, can produce the same level of brightness as a conventional lightbulb operating at power 100 W. The lifetime of the energy-efficient bulb is 10 000 h and its purchase price is $4.00, whereas..
A silicon sample is doped with phosphorus at 1.17 parts per 1.00*10^6, Calculate the number of free (conduction) electrons per unit volume of the doped silicon in conduction electrons per cm^3
A step-down transformer (turns ratio = 1:8) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train, What is the current in the primary coil?
A person decides to use an old pair of eyeglasses to make someoptical instruments. What is the maximum angular magnification he can produce
Consider water vapor, H2O, at 26 °C. What percentage of water vapor molecules have a speed within 1 m/s of the most probable speed
A rectangular container measuring 22cm multiplied by 48cm multiplied by 72cm is filled with water. What is the mass of this volume of water in kilograms and grams.
Two waves are traveling in the same direction along a stretched string. The waves are 45.0° out of phase. Find the amplitude of the resultant wave
when the mass has its maxiimum positive velocity is its distance from the equillibrium position maximum minimum or some
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -89\mu C. How many excess electrons does she get
The lowest frequency standing wave pattern that can be made on a certain string on a cello is 220Hz (which is a musical "A" note). calculate the frequency of the 3rd overtone
A 132- (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1930. Find the acceleration of the rocket
A 0.080 T magnetic field is perpendicular to a circular loop of wire with 100 turns and radius 30cm. what is the magnitude of the induced emf
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