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S_A_V [24]
3 years ago
5

Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92? A. 40 B. 52 C. 92 D. 132

Physics
1 answer:
Veseljchak [2.6K]3 years ago
8 0
B. 52. 40 protons plus 52 neutrons, adds up to 92.
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Slow-moving vehicles are prohibited from traveling on expressways or on roadways with a minimum posted speed limit greater than
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3 years ago
A car passes point “A” and then 120 meters later. It’s velocity was measured 21 m/s. If it’s acceleration was constant at 0.853
Norma-Jean [14]

Recall that

{v_f}^2-{v_i}^2=2a\Delta x

where v_i and v_f are the initial and final velocities, respecitvely; a is the acceleration; and \Delta x is the change in position.

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\left(21\dfrac{\rm m}{\rm s}\right)^2-{v_i}^2=2\left(0.853\dfrac{\rm m}{\mathrm s^2}\right)(120\,\mathrm m)

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3 years ago
Which of the following is an example of resourcefulness?
tatiyna
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A car has a momentum of -456 kg*m/s. What direction is it moving?
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6 0
3 years ago
What are advantages and disadvantages of apparent solar time? How is the situation improved by introducing mean solar time and s
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Answer:

Advantage:  

Apparent solar time gives the exact location of sun in the sky according to your precise location.

Disadvantage:  

As the apparent solar time changes with the change in longitude. It is very difficult to track these changes in longitude. Hence, it is almost impossible to make plan for events.

Improvement in situation:

Situation can be improved using mean solar time because due to this people living in the longitude band agree upon a standard time. In this way, it is easy to plan for events.  

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3 years ago
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