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Question: Air enters a duct at a pressure of 30 psia, a temperature of 100°F, and a velocity of 580 ft/sec. At some other point in the duct, the pressure is found to be 12 psia. Assuming that the flow is isentropic, find the temperature and Mach number at this point in the flow.
An artillery shell of mass 10.00 kg, lying at rest on the ground, accidentally detonates, exploding into three pieces of shrapnel. find the angle at which the remaining piece of shrapnel travels
A dentist uses a mirror to examine a tooth that is 1.25 cm in front of the mirror. The image of the tooth is formed 5.0 cm behind the mirror. Determine the mirror's radius of curvature
A rocket-powered hockey puck has a thrust of 4.0 Newton and a total mass of 1.0 kilogram. Determine how far does the puck land from the base of the table in meters
In the Challenger Deep of the Marianas Trench, the depth of seawater is 10.9 km and the pressure is 1.16 x 10^8Pa (about 1.15 x 10^3 atm). What is the density of seawater at this depth
A 37.0 kg child runs with a speed of 2.50 m/s tangential to the rim of a stationary merry-go-round, Calculate the initial kinetic energy of the system
A point charge Q = 6.30 x 10-6 C is at the center of a conducting spherical shell of radius R = 18.50 cm. The total charge of the shell is -6.30 x 10-6 C. What is the field just outside the shell
A 0.47 m long guitar string, of cross-sectional area 1.0 10-6 m2, has Young's modulus Y = 1.90 109 N/m2. By how much must you stretch the string to obtain a tension of 10 N
The nucleus of a 125Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fm in diameter. It has 54 protons and charge q = +54e. What is the proton's acceleration
A force does +130J of work while it acts on a moving object and its direction is in the same direction as the object's displacement. How much work does this force do as the angle between it and the object's displacement is 56°.
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 20 m. What is the magnitude of the acceleration of the car
Barometric pressure in the eye of a hurricane is 0.91atm (27.2 in of mercury). How does the level of the ocean surface under the eye compare with the level under the distant fair-weather region where the pressure is 1.0atm.
An 80-N crate slides with constant speed a distance of 5.0 m downward along a rough slope that makes an angle of 30 ° with the horizontal
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