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A ball is released from the bottom of an elevator which is travelling upward with a velocity of 2m/s. If the ball strikes the bottom of the elevator shaft in 3s, determine the height of the elevator from the bottom of the shaft at the instant the ball is released.Also find the velocity of the ball when it strikes the bottom of the shaft.
two 500 ml samples were completely mixed together the first sample contained 0.002 M Na2CO3 while the second contained 0.004 N NaOH. what volume of 0.02 N sulfuric acid would need to be added to neutralize the solution
A dense sand has an effective friction angle of 43 and c'=0. A dry, 2.8-inch diameter sample is tested in drained triaxial shear with a confining pressure of 2500 psf. What axial load, P (in pounds), will be required to fail the sample?
The basic barometer can be used to measure the height of abuilding. If the barometric readings at the top and at the bottomof a building are 28.7 and 29.7 in Hg, respectively, determine the height of the building in feet.
When in use, a fishing rod can be approximated to act as a cantilevered beam. Assume that the force (P) is applied to the end of the beam by a fish while the fisherman rigidly holds the other end of the beam.
The company engineer decides that this is too good, that it is not necessary to be this efficient, and proposed that part of the flue gas be bypassed around the electrostatic precipitator so that the recovery of fly ash (particulates) from the flu..
The angle of the release is 30 degrees. Determine the horizontal distance the shot travels from the point of release to the point where it hits the ground.
A civil engineering student contends that 60 mph is safe in a van because of the higher driver's eye height. If all other design inputs are standard, what must the driver's eye height in the van be for the student's claim to be valid
On a large lake without waves, how far from shore is a sailboat when the top of its 8m mast disappears from view of a person whos eye height is 1.5 m above the waters edge
Wheeling-Pittsburg steel is investigating whether it should replace some of its basic oxygen furnace equipment now or wait to do it later. The cost later (3 years from now) is estimated to be 1,700,000.
The perpendicular distance between two parallel tangents of a reversed curve is 20m. The azimuth of the back tangents of the curve is 270 00 and the azimuth of the common tangent is 310.
A jet aircraft flies at a speed of 600 mph at an altitude of 40,000 ft. The atmosphere is the standard atmosphere. (1) What is the air pressure outside the aircraft (2) What is the Mach number of the flow around the aircraft
To verify the constant of a particular prism, a straight line EFG is laid out. The EDM instrument is first set up at E, with the following measurements recorded: EG = 426.224 m, EF = 277.301 m.
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