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Citrus2011 [14]
4 years ago
15

I really don't understand any of this because my teacher does not help us

Physics
1 answer:
LUCKY_DIMON [66]4 years ago
5 0
1. A. Greater than because displacement is zero

2. D. Position because velocity is distance/time

3. A. Instantaneous

4. B. Velocity because it has a speed and direction

5. D. S = D/T because speed is distance over time 

6. A. Velocity because although speed is constant, direction is changing

7. C. Velocity

8. D. First negative, then position

9. D. Zero because the slope of velocity is acceleration

10. B. Inertia

11. A. Air resistance because it is the force pushing up on the object
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A"boat"is"moving"to"the"right"at"5"m/s"with"respect"to"the"water."A"wave"moving"to"the"left,"opposite"the"motion"of"the"boat."Th
s2008m [1.1K]

Answer:

0.99m

Explanation:

Firs you calculate the relative velocity between the boat and the wave. The velocity of the boat is 5m/s and the velocity of the wave is given by:

v=\lambda f=\lambda\frac{1}{T}=(110m)\frac{1}{8.3s}=13.25\frac{m}{s}

the relative velocity is:

v'=13.25m/s-5m/s=8.25\frac{m}{s}

This velocity is used to know which is the distance traveled by the boat after 20 seconds:

x'=v't=(8.25m/s)(20s)=165m

Next, you use the general for of a wave:

f(x,t)=Acos(kx-\omega t)=Acos(\frac{2\pi}{\lambda}x-\omega t)

you take the amplitude as 2.0/2 = 1.0m.

\omega=\frac{2\pi}{T}=\frac{2\pi}{8.3s}=0.75\frac{rad}{s}

by replacing the values of the parameters in f(x,t) you obtain the vertical displacement of the boat:

f(165,20)=1.0m\ cos(\frac{2\pi}{110m}(165)-(0.75\frac{rad}{s})(20s))\\\\f(165,20)=0.99m

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If you pour hot soup into a bowl, and the bowl stays cool to the touch, you can assume that...
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Explanation:

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