Consider free space path loss in your wireless communication systems:

Pt/Pr= (4πd)^2/λ^2

Where
Pt= Signal power at transmitting antenna
Pr= Signal power at receiving antenna
λ= Carrier signal wavelength.
d= Communication distance between antennas

Usually there is a minimum requirement of Signal to Noise Ratio SNR related to Pr. Please nominate at least three strategies in your communication system in order to increase the communication distance d. Explain why.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

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

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero