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One of the concrete pillars that supports a house is 2.3 m tall and has a radius of 0.69 m. The density of concrete is about 2.2 x 103 kg/m3. Find the weight of this pillar in pounds (1 N = 0.2248 lb).
A 1480{\rm kg} car pulls a 320{\rm kg} trailer. The car exerts a horizontal force of 3900{\rm N} against the ground in order to accelerate. What force does the car exert on the trailer
A metal strip 2.0 cm wide and 0.1 cm thick carries a current of 24 A in a uniform magnetic field of 2.4 T, as shown below. The Hall voltage is measured to be 4.27 V. Calculate the drift velocity of the electrons in the strip
A 4.1-m-tall, 30-cm-diameter concrete column supports a 2.0×10^5kg load. By how much is the column compressed
How much work must be done to bring three electrons. calculate the mass of an ice cube.
A spaceship of mass 2.30×106kg is cruising at a speed of 4.30×106m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
Unpolarized light of intensity I0 passes through six successive Polaroid sheets each of whose axis makes a 40? angle with the previous one
An old-fashioned (vinyl) record rotates at a constant rate of 45 rpm. how far does a point on the edge travel
A solid sphere and a shell sphere roll down an incline. Which one gets to the bottom first and why
A solenoid contains 780 coils of very thin wire evenly wrapped over a length of 17.5cm . Each coil is 2.50cm in diameter. what is the magnetic field at its center
A toy is made with three equal masses of 100 grams in the vertices of an equilateral triangle of side 7 cm. Determine the position of the center of mass of this object
pipe open at one end only has a fundamental frequency of 237 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Currently, when both pipes vibrate at their fundamental frequencies, a beat ..
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 4.0 m/s. What is the volume flow rate through the pipe
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