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Oduvanchick [21]
4 years ago
5

I need help with 3 question.

Physics
1 answer:
Tpy6a [65]4 years ago
3 0

Answer:

1 = c, 2 = b, 3 = a

Explanation:

Hope this helped you!

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Find the velocity, acceleration, and speed of a particle with the given position function. r(t) = t i + t2 j + 3 k v(t) = a(t) =
stepladder [879]

Answer:

Velocity

v= i + 2  j

Acceleration

a= 2 j

Explanation:

Given that

r(t) = t i + t² j + 3 k

We know that

Velocity v given as

v= dr/dt

dr/dt= i + 2 t j +0

v= i + 2 t j

At t= 1

v= i + 2 x 1 j

v= i + 2  j

Acceleration ,a

a=  dv/dt

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dv/dt= 2 j

a= 2 j

6 0
3 years ago
Which is not true of the weak nuclear force?
slavikrds [6]

Answer:

The weak nuclear force is one of the fundamental forces:

Is a force that is responsible of some radiative phenomenoms, like the beta decay.

The intensity is way smaller than the one of the strong interaction, but this is because it acts in a way smaller range. And this can produce atractive and repulsive interactions.

So options D and B can be discarded.

And this force can be repulsive or attractive depending on the phenomena, so the options that are wrong are A and B, because the interaction is both things, not only one.

7 0
3 years ago
If a vibrating string is made shorter (i.e., by holding your finger on it), what effect does
Ghella [55]
  <span>Pitch and frequency are more or less the same thing - high pitch = high frequency. 
The freqency of vibration of a string f = 1/length (L) so as length decreases the frequency increases.</span>
4 0
3 years ago
Rock at the edge of a cliff has kinetic energy because of its position.<br> True<br> False
LenaWriter [7]

its false rock is at edge

8 0
3 years ago
State the 3 laws of motion
Georgia [21]

Answer:

Explanation:

Newton's first law of motion:

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Newton's second law:

The net force on an object is equal to its mass times its acceleration.

Newton's third law:

For every action, there is an opposite and equal reaction.

6 0
3 years ago
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