Question
Which one of the following animals can hear ultrasonic
sound?Solution
Ultrasound is a cyclic sound pressure wave with a frequency greater than the upper limit of the human hearing range. Ultrasound is thus not separated from "normal" (audible) sound based on differences in physical properties, only the fact that humans cannot hear it.
Simplify the following expressions and choose the correct option.
18 * 15 - {3/5 of 250 + 72}
Simplify the given expression.
If 1560 ÷ 30 + 2025 ÷ 45 - z + 33 × 7 = 1848 ÷ 24 × 234 ÷ 39, then the value of z is:
2350 – 4830 + 9570 + 3350 – 1720 = ?
What should come in place of (?) question mark in the given expression.
[60% of 350 + (2/7 of 210)] ÷ 5 = ?
15% of 1800 + 22 = ?Â
- Calculate the value of this expression:
(180 - 90 ÷ 6 of 2) ÷ 5 + 3 of 16 ÷ 4 - 12 of 4 ÷ 8 (7/5) × (3/4) × (5/9) × (6/7) × 3112 = ?
Determine the value of 'p' in following expression:
720 ÷ 9 + 640 ÷ 16 - p = √121 X 5 + 6²- 7
Relevant for Exams:
