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Determine the work done in lifting a 250-lb refrigerator 4 ft vertically into a van. Alternatively, the refrigerator could be placed on a cart and rolled up a 10-ft-long ramp. What force, parallel to the ramp, is required to push the refrigerator along the ramp? (Neglect rolling resistance.)
the reliabilities of two alternative system configurations are to be evaluated . the first consists of two compnants in
particle a of mass ma 1.0 kg is at the edge of a table with height 1.0 m. it is connected to a particle b of mass mb
If the rod experienced 28% uniform strain, calculated the load at the onset of necking.
determine the work done by a 1-lb fluid system as it expands slowly within a piston-cylinder arrangement from an
water is pumped from a 200 m deep well into a 200 m tall water storage tank.a determine the power in kw that is
the hydraulic jack shown below consists of a master cylinder with a diameter of 60mm and a lifting or slave cylinder
bar ab of mass m and mass moment of inertia i 112ml2 is constrained to move within the channel as shown. the bar is
Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
zoologists estimate that the average adult cheetah can run at a speed of 100 kmhr and that the average antelope can run
an airplane wing modeled as a spring-mass system with natural frequency 40 hz is driven harmonically by the rotation of
a vapor in a cylinder is compressed frictionlessly from 20 to 60 psia in such a manner that pvconstant. the initial
a process occurs taking 5kg of mass from state a to state b. the work during this adiabatic process is 5kj. the change
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