A wave has frequency 100 Hz and wavelength 2 m. What is its speed?
Answer and explanation
Correct answer: A. 200 m/s
- Step 1: Wave equation: .
- Step 2: m/s.
Answer
200 m/s.
Why not the others: 50 m/s: it divides frequency by wavelength. 0.02 m/s: it divides wavelength by frequency. 102 m/s: it adds the numbers.
Practise more Wave Motion.
Free questions with an explanation for every one, and full timed General Secondary Certificate (Tawjihiya Kuwait) mock tests.
More Wave Motion questions
- A wave has frequency 440 Hz and wavelength 3 m. What is its speed?
- An object is placed 60 cm from a convex lens of focal length 12 cm. How far from the lens is the real image formed?
- An object is placed 60 cm from a convex lens of focal length 15 cm. How far from the lens is the real image formed?
- An object is placed 12 cm from a convex lens of focal length 8 cm. How far from the lens is the real image formed?
- An object is placed 24 cm from a convex lens of focal length 6 cm. How far from the lens is the real image formed?
- An object is placed 30 cm from a convex lens of focal length 20 cm. How far from the lens is the real image formed?