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lakkis [162]
3 years ago
7

Can someone please help, ;w;?

Physics
2 answers:
SOVA2 [1]3 years ago
7 0
I believe the answer is 3). The cell wall provides protection, it doesn’t control movements of materials in and out of the cell.
damaskus [11]3 years ago
5 0
The correct answer is 3
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What resistance must be connected in parallel with a 633-Ω resistor to produce an equivalent resistance of 205 Ω?
alukav5142 [94]

Answer:

303 Ω

Explanation:

Given

Represent the resistors with R1, R2 and RT

R1 = 633

RT = 205

Required

Determine R2

Since it's a parallel connection, it can be solved using.

1/Rt = 1/R1 + 1/R2

Substitute values for R1 and RT

1/205 = 1/633 + 1/R2

Collect Like Terms

1/R2 = 1/205 - 1/633

Take LCM

1/R2 = (633 - 205)/(205 * 633)

1/R2 = 428/129765

Take reciprocal of both sides

R2 = 129765/428

R2 = 303 --- approximated

5 0
3 years ago
How many joules of work are done against a truck when a force of 50 N pushes it 1 kilometer away
ELEN [110]

Answer:

Work = 50,000 J

Explanation:

Work = force * distance

Given that,

  • force = 50N
  • Distance = 1km = 1000m

Work = 50 * 1000

Work = 50,000 J

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2 years ago
Which order shows decreasing momentum?
klio [65]

Answer:

Explanation: Decreasing in velocity

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Which has a greater force: a semi-truck at rest or a moving bicycle?
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Although the semi truck certainly has a larger mass, it is not in motion and therefore does not have any momentum. The bicycle however has both mass and velocity and therefore has the larger momentum of the pair.

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How does Mr. Anderson define solubility in the video?
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