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A 2-kg ball B is traveling horizontally at 3 m/s when it strikes 2-kg ball A. Ball A is initially at rest and is attached to a spring with constant 15 N/m and unstretched length of 1.2 m. Knowing the coefficient of restitution between A and B is 0.9 and friction between all surfaces in negligible, determine the normal force between A and the ground when it is at the bottom of the hill.
a glass beaker with water is placed inside a bell jar and the jar is subjected to vacuum. the room temperature was
show how did you do the maintenance during your workshop machines were sent to your workshop from a big
if the u.s. fleet of vehicles suddenly became 15 more fuel efficient how much annual emissions of co2 would that
a thermoelectric device cools a small refrigerator and discards heat to the surroundings at 25c. the maximum electric
a 6.44 kg steel ball is at a height of 8.12 meters above the floor traveling at a velocity of 4.69 ms and has an
two tanks are connected by a valve and line as shown below. the volumes are both 1 m3. tank anbspcontains r-134a at
Determine the phase or phases in a system consisting of H2O at the following conditions and sketch p-v and T-v diagrams shown the locations of each state?
package is dropped from the plane which is flying with a constant horizontal velocity of vA = 150 ft/s at a height h = 1500 ft. Determine the radius of curvature of the path of the package just after it is released from plane at A.
natural gas at 70 f and standard atmospheric pressure of 14.7 psi is compressed isentropically to a new absolute
a 9 m3 tank has two sections separated by a membrane both of which contain nitrogen gas. the nitrogen in section a has
compressed liquid water at 42 c and 8 mpa steadily flows into a boiler and exits as a saturated vapor at 8 mpa. the
a particle at rest is located at point 325 with units of ft. it is subjected to an acceleration in units of fts2 of a
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