Questions

The Rate of doing work or rate of transfer of energy is called Power.

Verification of a login name and password is known as Authentication.

Giraffe has the highest blood pressure among animals. 

This is due to the fact that there is a large pressure drop (~100 mmhg) as the blood is transported from the heart, up the neck, to the brain. This is about twice the normal blood pressure of humans (120/80 mmhg).

Let the required weight be x kg.

Less weight, Less cost (Direct Proportion)

 250 : 200 :: 60 : x   =>    250 x x = (200 x 60)

=>

=> x = 48.

In order to protect the operating systems and the system programs from the malfunctioning programs the two mode operations were evolved

System mode

User mode