What percentage of the planet’s rare earth elements are found in China?
15 percent
55 percent...
Engineering, 19.01.2021 22:10 abc236
What percentage of the planet’s rare earth elements are found in China?
15 percent
55 percent
95 percent
100 percent
Answers: 1
Engineering, 04.07.2019 16:10
An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)
Answers: 2
Engineering, 04.07.2019 18:10
What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.
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
Engineering, 04.07.2019 19:20
Air enters a horizontal, constant-diameter heating duct operating at steady state at 290 k, 1 bar, with a volumetric flow rate of 0.25 m°/s, and exits at 325 k, 0.95 bar. the flow area is 0.04 m2. assuming the ideal gas model with k = 1.4 for the air, determine (a) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer, in kw flow rate, in kg/s, (b) the mass kg 0.3
Answers: 2
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