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Liono4ka [1.6K]
3 years ago
9

An ostrich runs north in a straight line for 21 meters. She then turns around and runs 25 meters back toward her nest (south) on

the same path. What is her displacement? please explain
Chemistry
1 answer:
drek231 [11]3 years ago
6 0
The ostrich runs 21 N then goes back by 25 S

The displacement is -4 S

21 - 25 = -4
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Answer:

Copper ions are reduced into copper atoms.

Cu²⁺₍aq₎ + 2e⁻ →  Cu₍s₎

Explanation:

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5 0
3 years ago
What is the relationship between the kinetic energy of molecules in an object and the object's temperature?
Gennadij [26K]

Answer:

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How much heat is required to raise the temperature of a 6.21 g sample of iron from 25.0 oC to 79.8 oC?
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Answer:

151.1J

Explanation:

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Mass of iron  = 6.21g

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Final temperature of iron  = 79.8°C

Unknown:

Amount of heat = ?

Solution:

The amount of heat require to cause this temperature can be determined using the expression below;

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3 years ago
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