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3 years ago

8

What happens when a positively charged rod is brought near a neutral plastic ball?

2 answers:

Rina8888 [55]3 years ago

7 0

Answer:

the will force away from one another please give brainlist

IRISSAK [1]3 years ago

5 0

Answer:

Image result for What happens when a positively charged rod is brought near a neutral plastic ball?

In order for the neutral sphere to become negative, it must gain electrons from the negatively charged rod. A neutral metal sphere is touched by a positively charged metal rod. In this case, electrons are transferred from the neutral object to the positively charged rod and the sphere becomes charged positively.

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A wagon train on the Oregon Trail averaged 17.3 miles each day across the plains. How far was the wagon train able to travel in

Makovka662 [10]

17.3 x 7 = 121.1 per week

121.1 x 4 = 484.4

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3 years ago

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Nine is 4 percent of what number

Katarina [22]

Answer:

225

Step-by-step explanation:

We can model this question with:

9 = 0.04x

x represents "what number."

0.04x = 9.

Divide 0.04 from both sides

0.04x ÷ 0.04 = 9 ÷ 0.04

9 ÷ 0.04 = 225.

Therefore, 9 is 4% of 225.

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3 years ago

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120/210 *60 (give the answer in hour and minutes)

Katyanochek1 [597]

120/210 = 0.57
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34 hours and 12 minutes

8 0

3 years ago

What is the factored form of the expression?<br><br> d^2 = 36d + 324

Veseljchak [2.6K]

Answer:

$(x-43.45)(x+7.45)=0$

Step-by-step explanation:

We have the quadratic equation $d^{2}=36d+324$ i.e. $d^{2}-36d-324=0$

As, the roots of the quadratic equation $ax^{2}+bx+c=0$ are given by $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ .

So, from the given equation, we have,

a = 1, b = -36 , c = -324.

Substituting the values in $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ , we get,

$x=\frac{36\pm \sqrt{(-36)^{2}-4\times 1\times (-324)}}{2\times 1}$

i.e. $x=\frac{36\pm \sqrt{1296+1296}}{2}$

i.e. $x=\frac{36\pm \sqrt{2592}}{2}$

i.e. $x=\frac{36\pm 50.9}{2}$

i.e. $x=\frac{36+50.9}{2}$ and $x=\frac{36-50.9}{2}$

i.e. $x=\frac{86.9}{2}$ and $x=\frac{-14.9}{2}$

i.e. x = 43.45 and x = -7.45

Thus, the roots of the equation are 43.45 and -7.45.

Hence, the factored form of the given expression will be $(x-43.45)(x+7.45)=0$

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3 years ago

The local library has a children’s section with picture books and chapter books. The ratio is 2:3. If there are a total of 500 b

PolarNik [594]

Answer:

300, I think.

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3 years ago

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