Engineering, 13.12.2021 19:30 10040813
What are the advantages of laser communications?
A. Lasers can be switched on and off at high speeds
B. Laser light remains collimated (focused) over long distances
C. Lasers are the lowest cost method for communicating over long distances
D. The much shorter wavelengths allow for more data to be transmitted per second
Answers: 2
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)
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Engineering, 04.07.2019 18:10
The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
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Engineering, 04.07.2019 18:10
Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise
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Engineering, 04.07.2019 18:10
The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
Answers: 3
What are the advantages of laser communications?
A. Lasers can be switched on and off at high spee...
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