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Helen [10]
3 years ago
11

Please help!!!!! (and explain if you can) thank you so SO much!!! *will give brainliest*

Physics
2 answers:
Anna [14]3 years ago
4 0

Answer:

negative because it they oppose they are going to make the ball float (like when tried to put the same sides of magnets to touch)

Explanation:

Marina CMI [18]3 years ago
4 0
I believe it’s negative :)
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What horizontally-applied force will accelerate a crate of mass 400 kg at 1 meter per second per second across a factory floor a
son4ous [18]

Answer:

The horizontally applied force = 2360 N

Explanation:

<em>Force:</em> Force can be defined as the product of mass and acceleration. the S.I unit of force is Newton (N)

Fh = Fr + ma......... Equation 1

Where Fh = horizontally applied force, Fr = friction force, m = mass of the crate, a = acceleration of the crate.

<em>Given: m = 400 kg, a = 1 m/s²</em>

Fr = 1/2 W, W = mg  ⇒W = 400×9.8 = 3920 N

∴Fr = 1/2(3920), Fr = 1960 N

Substituting these values into equation 1

Fh = 1960 + 400×1

Fh = 1960 + 400

Fh = 2360 N

Therefore the horizontally applied force = 2360 N

6 0
2 years ago
The more active a cell is, the more of these structures it has.
Aleks [24]

Answer:pretty sure its mitochondria

Explanation:

6 0
3 years ago
4. Changing the number of electrons changes the _____ of the atom, which is then called an _____.
statuscvo [17]

Changing the number of electrons changes the <em>net electric charge</em> of the atom.

If the atom was originally neutral, then it becomes an <em>ion</em> .  (If it wasn't originally neutral, then it was already an ion.)

5 0
2 years ago
A charge q1 of -5.00 × 10‐⁹ C and a charge q2 of -2.00 × 10‐⁹ C are separated by a distance of 40.0 cm. Find the equilibrium pos
Angelina_Jolie [31]

Answer:

Explanation:

The equilibrium position will be in between q₁ and q₂ .

Let this position of third charge be x distance from q₁

q₁ will pull the third charge towards it with force F₁

F₁ =9 x 10⁹x 5 x 10⁻⁹x15 x 10⁻⁹ / x²

= 675 x 10⁻⁹ / x²

q₂ will pull the third charge towards it with force F₂

F₂ =9 x 10⁹x 2 x 10⁻⁹x15 x 10⁻⁹ /( .40-x )²

= 270 x 10⁻⁹ / ( .40-x )²

For equilibrium

675 x 10⁻⁹ / x² = 270 x 10⁻⁹ / ( .40-x )²

5  / x² = 2 / ( .40-x )²

( .40-x )² / x² = 2/5 = .4

.4 - x / x = .632

.4 - x = .632x

.4 = 1.632 x

x = .245 .

24.5 cm

so third charge must be placed at 24.5 cm away from q₁ charge.

3 0
2 years ago
Miguel ran home at a speed of 4m/s. His house is 500 meters away. How long did it take him to get home?
Flauer [41]

Answer:

2000

Explanation:

500x4 is 2000

8 0
3 years ago
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