Engineering, 07.03.2020 05:46 jessicathegr823
A 100-watt [W] motor (70% efficient) is used to raise a 100-kilogram [kg] load 5 meters [m] into the air. How long, in units of seconds [s], will it take the motor to accomplish this task?
Answers: 2
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
Engineering, 04.07.2019 18:20
Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg
Answers: 2
Engineering, 04.07.2019 19:10
The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false
Answers: 2
Engineering, 04.07.2019 19:10
The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object
Answers: 1
A 100-watt [W] motor (70% efficient) is used to raise a 100-kilogram [kg] load 5 meters [m] into the...
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