Task 1 (Waves and Viration)

A wavelength of 0.75 m and the speed of the wave is 150 m / s. What is the frequency of the wave? (In unit Hz)

• 10

• 100

• 20

• 200

A vibrating source has a frequency of 300 Hz. The speed of the wave in liquid at a speed of 1500 m/s. What is the wavelength? (In m)

• 0,05

• 0,5

• 5

• 50

If the frequency of vibration is 440 Hz and the wavelength is 75 cm. What is the speed of the wave? (In unit m/s)

• 3

• 30

• 300

• 330

A pendulum is vibrated for 1 minute to produce 40 vibrations. Determine the period and frequency of the pendulum (must in order)!

• F = 3 Hz and T = 1,34 s

• F = 1,5 Hz and T = 0,67 s

• F = 1,34 Hz and T = 3 s

• F = 0,67 Hz and T = 1,5 s

A wave travels with the speed of the wave at 340 m/s. If the wave frequency is 50Hz. Determine the wavelength! (In unit m)

• 0,147

• 6,8

• 0,68

• 1,47

When the weather is cloudy a child hears thunder 1.5s after being seen lightning. If the speed of sound in the air is 320 m/s. Determine the distance of the lightning source from the child! (In m) *

• 21,33

• 213,3

• 48

• 480

The fundamental difference between transverse waves and longitudinal waves is ... (Choose 2 best answer)

• Transverse waves are waves whose propagation is perpendicular to the vibrational direction

• Longitudinal waves are waves whose propagation direction is parallel to the direction of their vibrations.

• Transverse waves are waves whose propagation is parallel to the vibrational direction

• Longitudinal waves are waves whose propagation direction is perpendicular to the direction of their vibrations.

Pay attention to the picture! Determine the wavelength, frequency, speed of the waves in order!

• 0,2 m; 5 Hz; 1 m/s

• 1 m; 5 Hz; 0,2 m/s

• 1 m; 0,2 Hz; 5 m/s

• 0,2 m; 1 Hz; 5 m/s

Pay attention to the picture! If the distance from A-C is 30 cm and the time is taken to swing from A-B for 1.5 s. Determine its frequency, period, wavelength, and the speed of the wave!

• 1/6 Hz; 6 s; 0,6 m; and 0,1 m/s

• 6 Hz; 1/6 s; 0,6 m; and 0,1 m/s

• 6 Hz; 1/6 s; 0,1 m; and 0,6 m/s

• 1/6 Hz; 6 s; 0,1 m; and 0,6 m/s

Pay attention to the picture! What is the number of waves in the picture, Determine the amplitude of the wave, the wave period and frequency, the wavelength, the speed of the wave, and the number of waves for 2 minutes!

• 1,5 waves; 0,2 m; 1,5 s and 0,67 Hz; 0,02 m; 0,13 m/s; 80 waves

• 1,5 waves; 0,2 m; 0,67 s and 1,5 Hz; 0,02 m; 0,13 m/s; 80 waves

• 1,5 waves; 0,02 m; 1,5 s and 0,67 Hz; 0,2 m; 0,13 m/s; 80 waves

• 1,5 waves; 0,02 m; 0,67 s and 1,5 Hz; 0,2 m; 0,13 m/s; 80 waves