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4 years ago

15

Sound travels at a rate of 340 m/s in all directions through air. Matt rings a very loud bell at one location, and Steve hears i

t some time later at his location 450 meters to the south. How long did it take the sound to travel from the bell to Steve’s location?

1 answer:

Mice21 [21]4 years ago

5 0

It took 450/340 = 1.32 seconds

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Using examples, explain why the first and second Newton laws of motion are significant for living organisms.

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Answer:

1) Newton's first law of motion states an object will remain at rest or in uniform will be in uniform motion in a straight line unless a force acts on it

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Explanation:

1) With Newton's first law, we are able arrange things within a space and schedule meetings in time knowing that they will remain in place unless an external force changes their positions

2) An example of Newton's second law of motion is that small objects such as a ball are easily accelerated and can be given appreciable acceleration for flight by single, one time contact (such as kicking the ball) while larger objects such as a rock require sustained force application to change their location.

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Two children are riding on a merry-go-round that is rotating with a constant angular speed. Abbie is one meter from the center o

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Answer:

The acceleration of Abbie is half of the Zak's.

Explanation:

The centripetal acceleration of an object on a circular path is given by :

$a=r\omega^2$

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Dividing equation (1) and (2) we get :

$\dfrac{a_1}{a_2}=\dfrac{r_1}{r_2}\\\\\dfrac{a_1}{a_2}=\dfrac{1}{2}\\\\a_1=\dfrac{a_2}{2}$

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3 years ago

An 8.75 kg point mass and a 14.0 kg point mass are held in place 50.0 cm apart. A particle of mass m is released from a point be

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Answer

given,

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another mass of the object = m₂ = 14 Kg

distance between them = 50 cm

R₁ = 17 cm

R₂ = 50 -17 = 33 cm

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F = F₁ + F₂

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$a = \dfrac{F}{m}$

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$a =1.162\times 10^{8} \ m/s^2$

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