(√3 - √2)2 = _____________?
a) 1 – 2√6
b) 1 - √6
c) 5 – 2√6
d) 1
Explanation: We know that
(a – b)2 = a2 – 2ab + b2
(√3 - √2)² = (√3)² - 2√3√2 + (√2)²
= 3 - 2√6 + 2
= 5 - 2√6 Answer
The rate of evaporation depends on the following factors besides temperature and humidity:
a) Surface Area
b) Wind Speed
c) Surface Area and Pressure
d) Wind Speed and Pressure
Explanation: A larger surface area provides more space for evaporation to occur, allowing a higher rate of evaporation.
Pressure can also affect the rate of evaporation. Lower pressure can lead to a decrease in the boiling point of a liquid, which can result in faster evaporation.
Therefore, the correct factors that influence the rate of evaporation besides temperature and humidity are surface area and pressure (option c).
Widal test is used to diagnose:
a) Typhoid fever
b) T.B
c) Cholera
d) Pneumonia
Explanation:The Widal test is a diagnostic test used to detect antibodies in the blood against the bacteria Salmonella typhi and Salmonella paratyphi, which are the causative agents of typhoid fever.
We’re having a barbecue next week.
a) Will you come?
b) Shall you come?
c) Do you come?
d) Where you coming?
No one could understand _________?
a) What he say
b) What he saying
c) What he said
d) What did he say
Explanation: The sentence "No one could understand" suggests that an event or situation occurred in the past. Therefore, the appropriate verb form to use in this context is the past tense. "What he said" indicates that people were unable to comprehend the words or message he conveyed in the past.
If n = 3, what is the value of 22n + 17:
a) 33
b) 13
c) 17
d) 81
Explanation: 22n + 17 ; putting the value of n = 3
22x3 + 17 26 + 17
64 + 17 =81
