14Hz
18Hz
28Hz
56Hz
Correct answer is C
The formula for the frequency in a stringed instrument : \(f = \frac{1}{2} \sqrt{\frac{T}{m}}\)
f = frequency; T = tension in the string; m = mass per unit lenth of the string.
f\(_1\) = 14 = \(\frac{1}{2} \sqrt{\frac{T}{m}}\).
When T is quadrupled, we have
f\(_2\) = new frequency = \(\frac{1}{2} \sqrt{\frac{4T}{m}}\)
= 2(\(\frac{1}{2} \sqrt{\frac{T}{m}}\))
= 2 f\(_1\)
= 2 x 14
= 28 Hz
In Economics, a market is defined as any
Agreement made for consumers to buy all they need
Arrangement made for producers sell all their goods
Agreement to sell commodities at low prices
Arrangement whereby the buyers and sellers are in contact
Correct answer is D
No explanation has been provided for this answer.
Which of the following radiations has it's frequency lower than that of infrared radiation?
Ultra-violet rays
gamma rays
x-rays
radio waves
Correct answer is D
No explanation has been provided for this answer.
Which of the following statements about the Galilean telescope is not correct?
the final image is inverted
it is shorter than terrestrial telescope
the final image is erect
it has a small field of view
Correct answer is A
No explanation has been provided for this answer.
Sound economic decision
Opportunity cost
Practicable government policy
Scale of preference
Correct answer is B
No explanation has been provided for this answer.