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Marysya12 [62]
3 years ago
14

A physical change can be distinguished from a chemical change because during a physical change- A. the properties of the substan

ce may change, but no new substances are produced B. the properties of the substance change for only a short time but will return to their original state. C. an entirely new substance with new properties forms as a result of the change D. a new substance is produced, but the new substance has properties identical to the original substance.
Physics
1 answer:
joja [24]3 years ago
3 0

Answer:

a

Explanation:

yw

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Potential energy decreases, and kinetic and thermal energy increase.

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Turning on and listening your favorite TV show is an example of
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A sail boat moves north for a distance of 10 km when blown by a wind 30° east of south with the force of 5.00×10^4 N. how much w
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<h3><u>Answer;</u></h3>

a) 5.00 x 10^8 J

<h3><u>Explanation;</u></h3>

The work done to move the sailboat is calculated through the equation;

W = F x d

where F is force and d is the distance.

Substituting the known values from the given above,

                             W = (5.00 x 10⁴ N)(10 km)(1000 m/ 1km)

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3 years ago
A 2.0 x 10^3-kilogram car travels at a constant speed of 12 meters per second around a circular curve of radius 30. meters. What
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The magnitude of the centripetal acceleration of the car as it goes round the curve is 4.8 m/s²

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From the question, we are to determine the magnitude of the centripetal acceleration.

Centripetal acceleration can be calculated by using the formula

a_{c} =\frac{v^{2} }{r}

Where a_{c} is the centripetal acceleration

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From the given information

v = 12 \ m/s

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Therefore,

a_{c} =\frac{12^{2} }{30}

a_{c} =\frac{144 }{30}

a_{c} = 4.8\ m/s^{2}

Hence, the magnitude of the centripetal acceleration of the car as it goes round the curve is 4.8 m/s²

Learn more on circular motion here: brainly.com/question/20905151

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2 years ago
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i really didn't understand the question

im soo so sorry

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