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Tems11 [23]
3 years ago
8

A child sits 1.6 m from the center of a merry go round that makes one complete revolution in 4.7 s. What is his angular accelera

tion?
Physics
1 answer:
olga2289 [7]3 years ago
7 0

Answer: angular acceleration = 2.86\ rad/sec^{2}

Given:

Distance from center of axis = 1.6 m

Time taken to complete one revolution = 4.7 sec

Therefore, we can evaluate the angular acceleration using the following formula:

\alpha = r\times \omega^{2}

\alpha = r\times (\frac{2\pi}{T})^{2}

\alpha = 1.6\times (\frac{2\times3.14}{4.7})^{2}

\alpha = 2.86\ rad/sec^{2}

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Explanation:

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286/300

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Answer:

Pseudoscience

Explanation:

Predicting future events in a person's life based on the lines on the palm of the hand is an example of Pseudoscience. A pseudoscience is a false science that makes claims based on faulty or nonexistent scientific evidence and often characterized by contradictory, excessive claims, etc. These types of Pseudoscientific beliefs are common due to widespread "scientific illiteracy among different societies.

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A student uses an indicator to measure the pH of a solution. The indicator shows a pH of 7. What must be true of this solution?
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PH < 7    acidic

PH = 7    neutral

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3 years ago
A car moving at 10.0 m/s encounters a depression in the road that has a circular cross-section with a radius of 30.0 m. What is
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Answer:

F = 789 Newton

Explanation:

Given that,

Speed of the car, v = 10 m/s

Radius of circular path, r = 30 m

Mass of the passenger, m = 60 kg

To find :

The normal force exerted by the seat of the car when the it is at the bottom of the depression.

Solution,

Normal force acting on the car at the bottom of the depression is the sum of centripetal force and its weight.

N=mg+\dfrac{mv^2}{r}

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