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A 100-watt lightbulb uses an average power of 100 W when it is connected to an rms source of 120 V. What is its resistance? What is the maximum current in the bulb?
Brian is trying to pull Julie on a sled across a flat snowy field. Brian pulls on a rope attached to the sed. His pulling force is directed forward and upwards at a 30 degree angle above horizontal. Julie's mass is 50kg and the sleds mass is 8kg. If ..
A uniform shaft, fixed at one end & free at other, is twisted so that each cross - section rotates through an angle proportional to the distance from the fixed end. If the shaft is released from rest in this position, determine the s
Three sinusoidal waves of the same frequency travel along a string in the positive direction of an x axis. find the phase constant of the resultant wave
500 mL of a liquid with a coefficient of volume expansion of 267x10-6/oC fills to the brim a container that has a coefficient of volume expansion of 99x10-6/oC. how much of the liquid will overflow the container
A physics book slides off a horizontal tabletop with a speed of 1.10 meter per second. Obtain the height of the tabletop above the floor
A gun isfired vertically into a 1.10 kg block of wood at rest directlyabove it. If the bullet has a mass of 21.0 g and a speed of 245m/s, how high will the block rise into the air
A singly charged ion of mass m is accelerated from rest by a potential difference ?V. It is then deflected by a uniform magnetic field (perpendicular to the ion's velocity) into a semicircle of radius R. What is the ratio of the masses of the ions
a 0.41 kg soccer ball approaches a player horizontally with a velocity of 17 m/s to the north. what impulse was delivered to the ball by the player
If the person applies of a force of 15 N on each handle and the blades are 3.5 cm long, how much force is applied to the branch?
An electron is at the origin. (a) Calculate the electric potential VA at point A, x = 0.310 cm. V (b) Calculate the electric potential VB at point B, x = 0.770 cm. V What is the potential difference VB - VA
you want to lift a 500-lb object with a lever. you can place a falcrum under a long board a distance of 1.5 ft from the object. how long is the board (total length) needed to lift the object
The radii of the wheels of a compound wheel and axle are 2cm, 5cm,and 10cm.It is found to have an efficiency of 90%. If a 500 kg load is lifted by the machine, how much effort in newtons is applied? what frictional force acts? Show a diagram of the s..
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