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3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST IF RIGHT!!!!

Physics

2 answers:

marta [7]3 years ago

6 0

Answer:

The answer is D

Hope this helped

PLEASE GIVE BRAINLIEST

Explanation:

NemiM [27]3 years ago

5 0

The answer is d, because it’s the tallest on the coaster.

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If a wave has amplitude of 0.2 meters, a wavelength of 0.5 meters, and a frequency of 32 Hz, at what speed is it moving?

GarryVolchara [31]

The velocity, frequency and wavelength of a wave are related by:
v = fλ
v = 32 x 0.5
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Explanation:

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3 years ago

12*3a car is stopped at a traffic light. it then travels along a straight road so that its distance from the light is given by w

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Missing parts in the text of the exercise:
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Solution:

part a) calculate the average velocity of the car for the time interval t=0 to t=8.0 s
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 $v_{ave} = \frac{x(8.0 s)-x(0 s)}{8.0 s-0 s}$
x(0 s), the distance covered after t=0 s, is zero, while the distance after t=8.0 s is
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Therefore, the average velocity is
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part b) calculate the instantaneous velocity of the car at t=0, t=4.0 s and t=8.0 s
- The instantaneous velocity can be found by performing the derivation of x(t):
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So now we just have to substitute t=0, t=4 s and t=8 s:
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part c) how long after starting from rest is the car again at rest?
- To solve this part we must find the value of t for which v(t)=0, so:
 $2bt-3ct^2=0$
$t(2b-3ct)=0$
The first solution is t=0 s, which corresponds to the beginning of the motion, so we are not interested in this value. The second solution is
 $t= \frac{2b}{3c}= \frac{2\cdot 2.4 m/s^2}{3 \cdot 0.13 m/s^3}=12.31 s$
and this is the time at which the car is at rest again.

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4 years ago

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Ostrovityanka [42]

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Explanation:

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3 years ago

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Andreas93 [3]

Answer:

Yes, it is right-angled

Explanation:

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Given two points A and B, the vector going from A to B is

$AB=B-A=(B_{x}-A_{x},B_{y}-A_{y},B_{z} -A_{z})$