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3 years ago

PLZZ HELP Explain how you can tell the difference between a physical and a chemical change.

Physics

1 answer:

Alecsey [184]3 years ago

7 0

Answer:

You can tell the difference between physical and chemical change by looking at the change that takes place like whether it is a permanent or temporary change.

Explanation:

physical change is temporary change and chemical change is permanent change
the original shape of the object can be restored in physical change whereas the original composition of the object will be lost in chemical change
in physical change the change is reversible whereas he chemical change is irreversible and the object takes new shape and position in this change.

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Answer:

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4 years ago

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USPshnik [31]

Answer:

u = 25 m/s

Explanation:

given,

length of skid = 93 m

coefficient of friction = 0.35

final velocity = 0 m/s

initial velocity = ?

force here is friction f = μ mg

F = ma

now com paring

-μ mg = m a

a = - μ g

a = - 0.35 x 9.8

a = -3.43 m/s²

we know,

v² = u² + 2 a s

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3 years ago

Need help with this physics question!

Fynjy0 [20]

Answer:

omg i need help with the same answer lol

Explanation:

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3 years ago

You could use newton’s second law to calculate the force applied to an object if you knew the objects mass and its _____.

olga2289 [7]

Answer:

You could use newton’s second law to calculate the force applied to an object if you knew the objects mass and its <u>acceleration.</u>

Explanation:

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This is given by :

$F=m\ a$

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In order to calculate force applied on object we require the mass of the object and its acceleration. The force can be calculated by finding the product of mass and acceleration of the object.

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Answer:

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