2 years ago

If an object has more positive charges than negative charges, the object has an overall?

Chemistry

1 answer:

guapka [62]2 years ago

6 0

It will have an overall positive charge.

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Convert the pressure 0.8 atm to kPa.

Ludmilka [50]

Answer:

81.0

Explanation:

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3 years ago

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If you use a horizontal force of 32.0 N to slide a 12.5 kg wooden crate across a floor at a constant velocity, what is the coeff

sergejj [24]

Answer:

Value of coefficient of kinetic friction is 0.26 .

Explanation:

Given:

Mass of wooden crate, m = 12.5 kg.

Horizontal force to keep the block moving with constant velocity, F = 32.0 N.

Since, the block is moving with constant velocity.

So, net force experience by it is zero.

Therefore, fore of friction is equal to applied force.

Now, force of friction , $F=\mu_kN$ ( here $\mu_k$ is coefficient of kinetic friction and N is normal force)

Therefore, $\mu_kN=\mu_k\times mg=\mu_k\times 12.5 \times 9.8=122.5\times \mu_k$

Now, both forces are equal.

$122.5\times \mu_k=32\\\mu_k=\dfrac{32}{122.5}=0.26$

The value of coefficient of kinetic friction is 0.26 .

Hence, it is the required solution.

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3 years ago

Do acids have ph above 7?

nata0808 [166]

No acids have a ph of less than 7 our rain is around a six. dilated water is a 7 and any thing above a 7 is a base

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3 years ago

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If the prescribed dosage of milk of magnesia Mg(OH)2 is 3.5 moles, how many grams

OlgaM077 [116]

Answer:

Explanation:

1 mole is equal to 58.31968 grams.

so 3.5 moles equal to answer choice B

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3 years ago

A mechanic needs a radiator to have 50% antifreeze solution. the radiator currently is filled with 4 gallons of 15% antifreeze s

Zanzabum

<span>let x=gallons of current mixture to be drained and replaced with pure antifreeze.
4-x=gallons of current mixture remaining in the car.</span>

<span>
0.15(4-x)+1.00x=0.50 x 4
0.6-.15x+x=2
0.85x=1.4
x=1.4/0.85 =1.65 gal

Thus, 1.65 gallons of current mixture to be drained and replaced with pure antifreeze.</span>

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3 years ago