3 years ago

What has occurred when metal changes color because of tarnishing?

2 answers:

8 0

Answer is: A chemical change occured when a metal changed color because it reacted with another substance. In chemical change new substances are formed, the atoms are rearranged and the reaction is followed by an energy change

Arisa [49]3 years ago

6 0

I believe the answer is A

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The asteroid ceres lies at an average distance of 414 million kilometers from the sun. The period of revolution of ceres around

7nadin3 [17]

Answer:

T2 = 1680,4 days

Explanation:

Kepplers law:

$\frac{T^{2} }{a^{3} } = constant$

For Earth:

T1 = 365 days ; a1 = 149 597 870 700 m

For Ceres:

T2 = ? days ; a1 = $414*10^{9} m$

Then:

$\frac{T1^{2} }{a1^{3} } = \frac{T2^{2} }{a2^{3} } ----> T2 = T1*\sqrt{\frac{a2^{3}}{a1^{3}}}$

Replacing values:

T2 = 1680,4 days

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3 years ago

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Producers,____________, and_______________ help to move matter and energy through ecosystems.

Phoenix [80]

Producers, consumers, and decomposers help to move matter and energy through ecosystems.

Hope this helps! :)

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3 years ago

Explain how skeletal muscles and nerves work together to help you move

Lana71 [14]

Sensors in the muscles and joints send messages back through peripheral nerves to tell the cerebellum and other parts of the brain where and how the arm or leg is moving and what position it's in

4 0

3 years ago

The kinetic and potential energies of an object both always depend on which property?.

hichkok12 [17]

Answer:

the object's position.

Explanation: might help ion know

5 0

3 years ago

What equation describes conservation of charge?

Phantasy [73]

Answer:

The equation which describes conservation of charge is $Q_{initial} - Q_{final } = 0$

Explanation:

The law of conservation charge states that for an isolated system that sum of initial charges is equal to sum of final charges, that is the total charge is conserved.

let the sum of initial charges = $Q_{initial}$

let the sum of the final charges = $Q_{final}$

$Q_{initial } = Q_{final}\\\\Q_{initial } - Q_{final} = 0$

Therefore, the equation which describes conservation of charge is $Q_{initial} - Q_{final } = 0$

6 0

3 years ago