TRUE or FALSE: The SI unit for frequency is hertz.Ģ3. TRUE or FALSE: The number of waves generated per second by a source is called the frequency of the source.Ģ2. A period of 0.005 seconds would be equivalent to a frequency of _ Hz.Ģ1. A pendulum makes exactly 40 vibrations in 20.0 s. Which one of the following properties of a wave is independent of all the others?ġ9. Yet, one wave property is independent of all other wave properties. Many wave properties are dependent upon other wave properties. What is the frequency of a wave that has a speed of 0.4 m/s and a wavelength of 0.020 meter?ġ8. The Anatomy of a Wave | The Wave Equationġ7. If the frequency of the source is 2.00 Hz and the wave speed is 5.00m/s then the distance between adjacent wave crests is _ meter. A periodic and repeating disturbance in a lake creates waves which emanate outward from its source to produce circular wave patterns. The number of cycles of a periodic wave occurring per unit time is defined as a wave's _.ġ6. If the distance from point A to point B in the diagram is 60 cm, then the wavelength is _.ġ5. How many complete waves are shown in the diagram?ġ4. The frequency of the wave could be expressed asĬonsider the following diagram for Questions #13-#14.ġ3. A wave X meters long passes through a medium with a speed of Y meters per second. The wavelength of the wave in the diagram above (Question #10) is _ m.ġ2. What is the amplitude of the wave in the diagram below?ġ1. As a wave passes across a boundary into a new medium, which characteristic of the wave would NOT change?ġ0. As a wave travels into a medium in which its speed increases, its wavelength would _.ĩ.
The main factor which effects the speed of a sound wave is the _.Ĩ. As a pulse travels though a uniform medium, the speed of the pulse _.ħ. Granted there is a £160,000 price difference (that’s 20 years of inflation for you and the fact the Cobra Nautique 9.2m has an extra 2m, one more engine and 375 additional horses than the one we owned) but the design and layout is just as brilliant. If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating _. Twenty years later, the 9.2m that bobs before me at Sandbanks Yacht Company shares all of those alluring traits. The particles of the medium are vibrating _. A transverse wave is traveling through a medium. When the particles of a medium are vibrating at right angles to the direction of energy transport, then the wave is a _ wave.Ĥ. If the particles of the medium are vibrating to and fro in the same direction of energy transport, then the wave is a _ wave.ģ. A single disturbance that moves from point to point through a medium is called a _.Ģ. We conclude that aerobic exercise improved arterial stiffness significantly and that the effect was enhanced with higher aerobic exercise intensity and in participants with greater arterial stiffness at baseline.The Review Session » Waves » Questions with Links Basics of Waves Review There was no significant effect of combined exercise on PWV and AIx. Resistance exercise had no effect on PWV and AIx. In addition, aerobic exercise had a significantly larger effect in reducing PWV (WMD:-1.0 m/s, 95% CI: -1.43, -0.57) in participants with stiffer arteries (PWV ≥ 8 m/s). Higher aerobic exercise intensity was associated with larger reductions in AIx (β: -1.55%, CI -3.09, 0.0001).
Aerobic exercise training showed significantly greater reduction in brachial-ankle (WMD: -1.01 m/s, 95% CI: -1.57, -0.44) than in carotid-femoral (WMD: -0.39 m/s, 95% CI: -0.52, -0.27) PWV. We searched the Medline, Embase and Cochrane Library databases from inception until April 2014 for randomized controlled trials lasting ≥ 4 weeks investigating the effects of exercise modalities on PWV and AIx in adults aged ≥ 18 years.įorty-two studies (1627 participants) were included in this analysis. Our objectives were to investigate the effects of exercise modalities (aerobic, resistance or combined) on pulse wave velocity (PWV) and augmentation index (AIx), and to determine whether the effects on these indices differed according to the participants' or exercise characteristics. However, the effects of different exercise modalities on arterial stiffness are currently unclear. Physical activity is associated with lower cardiovascular and all-cause mortality.