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Draft tubes as shown in Fig. P12.66 are often installed at the exit of Kaplan and Francis turbines. Explain why such draft tubes are advantageous.
A 0.500 kg block is attached to one end of a 4.00 g string. The other end of the string is secured to the center of a frictionless tabletop. What type of force must the tension in the string provide
An aircraft performs a maneuver called an aileron roll. During this maneuver, the plan turns like a screw as it maintains a straight flight path, but using its ailerons to set the wings in circular motion.
A disk of radius R = 9 cm is pulled along a friction less surface with a force of F = 15 N by a string wrapped around the edge. At the instant when d = 28 cm of string has unwound off the disk, what is torque exerted about the center of the disk.
A stone is dropped into a river from a bridge 41.9 m above the water. What is the initial speed of the second stone
Let the mass of object 1 be m and the mass of object 2 be 3m. what are the velocities of the two objects after the collision
The temperature of a 1 meter long aluminum rod is 20°C. If the temperature is increased to 70°C, determine the length of the rod
An electron, traveling at a speed of 7.37 X 10^7 m/s, strikes the target of an X-ray tube. What is the wavelength of the X-ray photon
Where r is the distance between the two atoms and A,R and S positive constants with S
Electrons produced by a certain device are observed to travel in a circular path with a radius of 4.4 cm when placed in a uniform magnetic field whose strength is 47 MN/C. What is the speed of the electrons emitted by this device?
An inductor of L=0.7H and a charged capacitor C=5F with Q =20C are connected to each other. How much energy is stored in the capacitor initially? When the current in the circuit is ½ its maximum value, how much energy remains in the capacitor?
Two forces are applied to a door knob, perpendicular to the door. The first force is twice as large as the second force. Find the ratio of the torque of the first to the torque of the second
a bead is able to slidealong a small wirein the form of a parabola. the parabola is rotating with constant angular
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