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A Venturi tube may be used as the inlet to an automobile carburetor. If the 2.0-cm diameter pipe narrows to a 1.0-cm diameter, what is the pressure drop in the constricted section for an airflow of 3.0 cm/s in the 2.0-cm section? (? = 1.2 kg/m3.)
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations ("hyper gravity") on test pilots and astronauts. In this device, an arm 8.84 {rm m} long rotates about one end in a horizontal plane..
An athlete whirls a 7.49 kg hammer tied to the end of a 1.3 m chain in a horizontal circle. What is the centripetal acceleration of the hammer
A farsighted person has a near point that is 48.0 cm from her eyes. Find the focal length of the eyeglasses
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to do this
A small piece of dust of mass m = 1.6 g travels horizontally through an electric air cleaner in which the electric field is 511 N/C. What is the charge on the dust particle
find out the magnitude of an acceleration
A room is 20 ft, 2in. long and 12 ft, 5 in, wide, and the ceiling is 12 ft, 2.5 inches above the floor; what is the volume of the room in cubic feet
q1. an green hoop with mass mh 2.5 kg and radius rh 0.14 m hangs from a string that goes over a blue solid disk
A shell is fired at an angle of 30 to the horizontal with velocity of 196 m/s. Find the total time of flight, horintol range and maximum height attained
Two charges Q1=+6mC and Q2=+4mC are separated horizontally on a straight line, find the magnitude of the electric force between these charges
A 3.4cm diameter parallel-plate capacitor has a 2.5mm spacing. The electric field strength inside the capacitor is 1.5×10^5 V/m, how much is the charge on each plate
A 194 N force is needed to slide a box across a flat surface at a constant velocity. What is the coefficient of kinetic friction between the box and the floor. (Use g = 9.8 m/s2.)
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