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Over [174]
3 years ago
10

You toss a marble straight up into the air with a speed of 1.3 m/s. How long does it take the marble to reach its highest point?

Physics
2 answers:
Softa [21]3 years ago
8 0
The acceleration of gravity is 9.8 m/s².  That means that the speed of the marble is always 9.8 m/s greater downward than it was 1 second earlier.

You want to know when the marble is going to stop climbing.  Well, that
will be when its upward velocity has dwindled to zero.  That in turn is the
time when its upward velocity is 1.3 m/s  less than it was when you tossed it.

      (1.3 m/s)  /  (9.8 m/s²)  =  0.133 second  (rounded)
FromTheMoon [43]3 years ago
3 0
D
Reason:- 
              applying the formula
              vf=vi+gt
              1.3/9.8=t
               0.13=t(Ans)
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Answer:

A.

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3 years ago
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Goshia [24]

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3 years ago
Resonances of the ear canal lead to increased sensitivity of hearing, as we’ve seen. Dogs have a much longer ear canal—5.2 cm—th
krek1111 [17]

Answer:

B. 1700 Hz, 5100 Hz

Explanation:

Parameters given:

Length of ear canal = 5.2cm = 0.052 m

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The ear canal is analogous to a tube that has one open end and one closed end. The frequency of standing wave modes in such a tube is given as:

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7 0
3 years ago
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