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Air flows in a 20-cm-diameter duct at 120-C and 120 kPa with a mass flux of 5 kg=s. The circular duct converts to a 20-cm square duct in which the temperature and pressure are 140-C and 140 kPa, respectively. Determine the velocities in both sections of the duct.
Each croquet ball in a set has a mass of .50kg. The green ball travels at 10.5m/s and strikes a stationary red ball. what is the final speed of the red ball after the collision
A 3250 kilogram airplane takes 12.5 minute to achieve its cruising altitude of 10.0 kilometer and cruising speed of 850 km/h. find what is the efficiency of the engines
The rain-soaked shoes of a man may explode if ground current from nearby lightning vaporizes the water. compute what average current is required to vaporize the water
Find the change in the force of gravity between two planets when the distance between them is decreased by eight
In exercising, a weight lifter loses 0.124 kg of water through evaporation, find the change in the internal energy of the weight lifter
Two 18 cm diameter charged disks face each other, 25 cm apart. Both disks are charged to - 30 nC. What is the electric field strength at the midpoint between two disks.
An ideal gas in a container is at a temperature of 78.5°C. What is the average translational kinetic energy of a gas
The following two lists give the diameters and sound frequencies for three loudspeakers. find the common diffraction angle
In an experiment, a rectangular block with height h is allowed to float in two separate liquids. In the first liquid,which is water, it floats fully submerged. In the second liquid it floats with height h/5 above the liquid surface. What isthe relati..
If the torque required to loosen a nut that is holding a flat tire in place on a car has a magnitude of 40.0 N•m, determine what minimum force must be exerted by the mechanic
A spherical balloon has a radius of 7.5 m, and is filled withhelium. How large a cargo can it lift, assuming that the skin andstructure of the balloon have a mass of 800 kg
A bar magnet is oriented with its magnetic dipole moment at 38.5° to the direction of a 0.0145-T magnetic field, Find the magnitude of the magnet\'s magnetic dipole moment
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