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Slav-nsk [51]
3 years ago
10

Define chemical and physical changes. (

Physics
2 answers:
ZanzabumX [31]3 years ago
6 0

Chemical change is two things get chemical reaction and produce a new product.

AlladinOne [14]3 years ago
3 0

A chemical change is a change in the chemical properties of a substance, resulting in a new substance. (example: rusting iron)

A physical change only changes physical properties, and is easily reversible. It does not result in a new substance. (example: melting ice)

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Magnetic field is the strength of magnetism created by a magnet, whereas the magnetic force is the force due to two magnetic objects. The concepts of magnetic field and magnetic force are widely used in fields such as classical mechanics, electromagnetic theory, field theory and various other applications.

Explanation:

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A tiny boat is floating in a metal bucket. If you build a fire under the bucket ,how will most of the heat be transferred from t
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A ball initially at rest rolls down a hill with an acceleration of 3.3 m/s2. If it accelerates for 7.5 s, how far will it move?
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<u>Answer:</u>

  Ball will move 92.8125 meter along the cliff in 7.5 seconds.

<u>Explanation:</u>

We have equation of motion , s= ut+\frac{1}{2} at^2, s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

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Substituting

  s=0*7.5+\frac{1}{2} *3.3*7.5^2\\ \\ =92.8125 meter

  So ball will move 92.8125 meter along the cliff in 7.5 seconds.

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I think the answer must be A.

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it will show a continuous rise in value. The rise will be sinusoidal.

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