Question

I have difficulties understanding physical science and I'd really appreciate it if someone would check over the answers of my practice quiz. I have a test coming up and I really don't want to fail it. I marked my answers with a ******. Thank you in advance!


1. A transverse wave can be created in a Slinky® by moving it
(a) up and down
(b) together and apart
(c) side to side******
(d) in a circle

2. Which is true about surface waves?
(a) the disturbance is only parallel to the motion of the wave******
(b) the disturbance is only perpendicular to the motion of the wave
(c) the disturbance is in a circular motion
(d) the disturbance does not have a specific motion

3. Which of these waves has a disturbance that is only perpendicular to the wave motion?
(a) transverse waves
(b) longitudinal waves******
(c) surface waves
(d) no wave has a disturbance that is perpendicular

4. What is the speed of a wave if the wavelength is 100 m and the period is 20 s?
(a) 2,000 m/s******
(b) 120 m/s
(c) 80 m/s
(d) 5 m/s

5. When traveling from a solid to air, what would you expect a sound wave to do?
(a) speed up******
(b) slow down
(c) stay the same speed
(d) fluctuate speed

6. If a crest and a trough in a ripple tank meet, what happens?
(a) they cancel each other out
(b) they add up to form a larger trough
(c) nothing happens
(d) constructive interference occurs******

7. Hydroelectric power relies on the transfer of energy from waves through what medium?
(a) nuclear reactions
(b) wind
(c) water******
(d) the ground

8. Which of the following results when a crest and a trough meet?
(a) constructive interference
(b) destructive interference******
(c) no interference
(d) nothing

9. Sound waves are also called compression waves. This means that as the wave travels through air, the ________ increases and decreases.
(a) energy******
(b) pressure
(c) motion
(d) light

10. In order of fastest to slowest, how do sound waves travel through different mediums?
(a) solids > liquids > gases
(b) gases > liquids > solids******
(c) liquids > solids > gases
(d) solids > gases > liquids

11. Which of these is part of the inner ear?
(a) the ossicles******
(b) external auditory meatus
(c) organ of Corti
(d) tympanic membrane

12. When a large amplitude sound vibrates the ear significantly, a _________ results.
(a) high pitch******
(b) low pitch
(c) loud sound
(d) soft sound

13. The A note has a frequency of 880 Hz. What is the wavelength if the speed of sound is 343 m/s?
(a) 0.39 m
(b) 2.57 m
(c) 537 m
(d) 301,000 m******

Answer 1

I checked them. You got 1 and 8 right. On 7 the question makes no sense to me. You missed the rest.