Answer / Explanation:
Eavesdropping attack is also sometimes refereed to as sniffing attack. It is simply the process by which an attacker or hacker tries to penetrate very suddenly into an unaware individuals network or server with the intention to steal information transmitted over the network or server through that computer.
To prevent such attack, there are several mean which include installing network monitoring software to check who else is connected to the network but the most common method of preventing such attack is to encrypt the Hypertext Transfer Protocol (http) and the way to do this is by securing it with a sort of security key.
On installing the security key, the network becomes encrypted and secured such that whatever network transmitted over the network becomes encrypted and unable to read. The protocol then converts to (https).
Solution :
The spring is expanded by 2 times of the block when it moves down an inclined by x times.
Here, 
= 39 mm
= 225 mm
a). From the work energy principal,
Work forces = kinetic energy
b). calculating the distance travelled by the block before it comes to rest.
Substitute the value of 
in (1),
x = 0.20 m
Answer:
With increased technological knowledge and consequent decreased factors of ignorance, the structures have less inert masses and therefore less need for such decoration. This is the reason why the modern buildings are plainer and depend upon precision of outline and perfection of finish for their architectural effect.
Work done = -19.7 KJ
Heat transferred = 17.4 KJ
Explanation:
Given-
Temperature, T = 27°C
Volume, V = 0.2 m³
Pressure, 
= 1 bar
= 4 bar
pV¹°¹ = constant
From superheated propane table, at = 1 bar and
= 27⁰C
= 0.557 m³/kg
= 473.73 KJ/kg
(a) Work = ?
We know,
V1¹°¹ = p2V2¹°¹
At = 4 bar and v = 0.158 m³/kg
u2 = 548.45K J/kg
To find work done in the process:
(b) Heat transfer = ?
