Through which waves does an ordinary mobile phone communicate?
A. Radio waves
B. Sound waves
C. Light waves
D. X-rays
Correct Answer: A (Radio waves)
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A. Radio waves
B. Sound waves
C. Light waves
D. X-rays
A. (n – m) / (n + m)
B. (n + m) / (n – m)
C. (n – m) – (n + m)
D. (n + m) – (n – m)
A. 10c – 8
B. 8c – 10
C. 10c + 8
D. 8 – 10c
A. 15 years
B. 20 years
C. 25 years
D. 28 years
A. x + 5 years
B. x + 15 years
C. x + 10 years
D. x – 25 years
A. Even
B. Whole
C. Rational
D. All of these
A. Transport oxygen
B. Clot blood
C. Fight infection
D. All of the above