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alex41 [277]
2 years ago
8

How does the digestive system help the muscular system?

Physics
1 answer:
Sveta_85 [38]2 years ago
8 0

Answer:

I would say the answer is A... but I'm not so sure ....

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Two charged spheres are 20 cm apart and exert an attractive force of 8 x 10-9 n on each other. What will the force of attraction
Pavel [41]

Answer:

3.2\cdot 10^{-8} N

Explanation:

The inital electrostatic force between the two spheres is given by:

F=k\frac{q_1 q_2}{r^2}

where

F=8\cdot 10^{-9} N is the initial force

k is the Coulomb's constant

q1 and q2 are the charges on the two spheres

r is the distance between the two spheres

The problem tells us that the two spheres are moved from a distance of r=20 cm to a distance of r'=10 cm. So we have

r'=\frac{r}{2}

Therefore, the new electrostatic force will be

F'=k\frac{q_1 q_2}{(r')^2}=k\frac{q_1 q_2}{(r/2)^2}=4k\frac{q_1 q_2}{r^2}=4F

So the force has increased by a factor 4. By using F=8\cdot 10^{-9} N, we find

F'=4(8\cdot 10^{-9} N)=3.2\cdot 10^{-8} N

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3 years ago
HELP ASAP!!!!! Choose all the answers that apply. Technology A)influences science
IceJOKER [234]

letter B. and A. im not sure.

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2 years ago
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A new business should be based on an entrepreneur's individual interests because the entrepreneur must have sufficient confidenc
hammer [34]

Answer: D) dedicate as many hours as needed to the work.

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Knowing that a 0.90-kg object weighs 9.0 N , find the acceleration of a 0.90-kg stone in free fall . Express your answer to two
sasho [114]

Answer:

The value of acceleration of a stone in free fall is 10\ m/s^2.

Explanation:

Given that,

Mass of the object, m = 0.9 kg

Weight of the object, W = 9 N

We need to find the acceleration of a stone in free fall. The weight of an object is given by :

W = mg

g is the acceleration of the stone in free fall

So, g=\dfrac{W}{m}

g=\dfrac{9\ N}{0.9\ kg}

g=10\ m/s^2

So, the value of acceleration of a stone in free fall is 10\ m/s^2. Hence, this is the required solution.

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