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Klio2033 [76]
3 years ago
7

Classify the following as a chemical change (C) or a physical change (P) : A bike rusting

Physics
1 answer:
Setler [38]3 years ago
4 0

Answer:

chemical change

Explanation:

When a substance rusts it reacts with air and moisture, iron oxide is formed as a product. Since there is a substance formed from the reaction this makes it a chemical change

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Read 2 more answers
an ice skater starts with a velocity 2.25 m/s in a 50.0 degree direction after 8.33s she is moving 4.65 m/s in a 120 degree dire
svetoff [14.1K]

Answer:

-0.032 m/s^2

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To answer the question, we just need to consider the motion along the horizontal direction.

The component of the initial velocity of the ice skater along the x-direction is:

u_x = u cos \theta =(2.25)(cos 50^{\circ})=1.45 m/s

where u = 2.25 m/s is the initial velocity and 50^{\circ} is the angle.

The component of the final velocity of the ice skater along the x-direction is

v_x = u cos \theta =(4.65)(cos 120^{\circ})=-2.33 m/s

where u = 4.65 m/s is the final velocity and 120^{\circ} is the angle.

The acceleration along the x-direction is given by

a_x=\frac{v_x-u_x}{t}

where

t = 120 s is the time

Substituting,

a=\frac{-2.33-(1.45)}{120}=-0.032 m/s^2

7 0
4 years ago
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