Answer:
The answer is 0.83 seconds.
Explanation:
The formula of free fall is following:

Where g=9.8 m/s^2 and t=2 seconds, the rock takes:

19.6 meters. This is the half distance of the cliff. The whole distance is 39.2 meters. So it takes:

2.83 second to fall down completely. The rock takes the second half of the cliff in 0.83 seconds
<h3>Reducing Surface Area.</h3>
If the surface area becomes smaller, the pressure becomes larger.
The correct matches are as follows:
<span>1. first nuclear reactor
</span>Fermi - an italian physicist who made the first nuclear reactor<span>
2. </span>1/0 η<span>
</span>atomic mass <span>
3. decaying nuclei
</span>fission<span> - nuclear reaction from a heavy elements to lighter elements
4. number of neutrons and protons
</span>neutron <span>
5. builds heavier elements
</span>fusion - nuclear reaction from two or more elements to a heavier element<span>
6. discovered radioactivity
</span>Curie<span>
7. unit of radiation
</span> Becquerel
It is p d day we’ll be together if it weighs 5kg you divide by the accelerated pace 400 dividdd by 400 is 45 and 500 divided by 500 is 75 answer is 75.
Answer:
58.33 Hz
175 Hz
291.67 Hz
Explanation:
L = Length of tube = 1.5 m
v = Speed of sound in air = 350 m/s
The first resonant frequency is given by

The first resonant frequency is 58.33 Hz
The second resonant frequency is given by

The first resonant frequency is 175 Hz
The third resonant frequency is given by

The first resonant frequency is 291.67 Hz