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Kisachek [45]
2 years ago
6

How do vaccines protect the human body systems from viruses?

Biology
1 answer:
slega [8]2 years ago
8 0
The correct answer is D I believe.
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A force is applied to a particle along its direction of motion. At what speed is the magnitude of force required to produce a gi
krek1111 [17]

Answer:

Explanation:

The detailed steps are as shown below

  • Recalling from F = ma
  • a = F/m
  • but magnitude of force F = √ [ 1 - v²/c²]

but acceleration twice as great as the force required to produce the same acceleration;

  • 2m = m / √[ 1 - v²/c²]
  • 2 = 1 / √ [ 1 - v²/c²]
  • square both sides ;

4 = 1 / [ 1 - v²/c²]

1/4 = 1 - v²/c²

v²/c² = 3/4

v/c = √ [3/4]

v = 0.87c

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v = speed of the particle =  0.87( 3 x 10^8m/s)

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5 0
2 years ago
Several Eastern European countries today gather funds to protect their forests through collecting fines for illegally cutting tr
Molodets [167]

Answer:

True

Explanation:

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