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Lelu [443]
2 years ago
14

According to the law of conservation of matter,the number of ______ is not changed by a chemical reaction

Physics
2 answers:
miv72 [106K]2 years ago
8 0

No, actually the answer is atoms.

abruzzese [7]2 years ago
6 0
The answer is mass. I have to comment more than 20 characters.
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For most people, getting 8 to 9 hours of sleep increases concentration, improves physical health, and improves one's mood.
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Explain the different methods that can be used to model the motion of an object.
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3. Christina is on her college softball team, and she is practicing swinging the bat. Her coach wants her to work on the speed a
inessss [21]

Answer:

The average angular acceleration is  \alpha =125.487 rad /s^2

Explanation:

From the question we are told that

  From the question we are told that

        The length of the bat is l = 0.85m  \

         The initial linear velocity is  u = 0 m/s

         The time is  t = 0.15s

         The velocity at t is  v = 16 m/s

  Generally average  angular acceleration is mathematically represented as

                \alpha  = \frac{w_f - w_o}{t}

        Where w_f is the finial angular velocity which is mathematically evaluated as  

            w_f = \frac{v}{l}

                  w_f = \frac{16}{0.85}

                        = 18.823 rad/s

 and w_o is the initial angular velocity which is zero since initial linear velocity is zero

               So

                         \alpha  = \frac{18.823 - 0}{0.15}

                               \alpha =125.487 rad /s^2

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3 years ago
The source of the centripetal force that arises when a runner rounds a curve on a track is _____.
mel-nik [20]

It's actually Friction.

I just did the test and got it right.


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