Answer:
Geology is the study of the Earth that involves the process at Earth, materials of which it is made, and its history.
<u>Geologists combine both laboratory and field data to illustrate the results of their research. Some observations that can the geologist make by working outdoors instead of in a lab are as follows:</u>
- Understanding and exploring the earth's surface closely using geophysical tools.
- Collecting samples by own and make some interpretations at the same time.
- Observation of the landscapes
- Close observation of outcrops
Answer:
a) J=![7.5*10^{-10}](https://tex.z-dn.net/?f=7.5%2A10%5E%7B-10%7D)
b) F = ![2.5*10^{-6}N](https://tex.z-dn.net/?f=2.5%2A10%5E%7B-6%7DN)
c) The force is 2551.02 times bigger than the weight of the pollen grain.
Explanation:
a) we know that the impulse J is equal to:
J =![MV_f-MV_i](https://tex.z-dn.net/?f=MV_f-MV_i)
where M is the mass,
is the final velocity and
the initial velocity. So, replacing values, we get:
J =![(10^{-10})(7.5m/s)-(10^{-10}(0)](https://tex.z-dn.net/?f=%2810%5E%7B-10%7D%29%287.5m%2Fs%29-%2810%5E%7B-10%7D%280%29)
J =![(10^{-10})(7.5m/s)](https://tex.z-dn.net/?f=%2810%5E%7B-10%7D%29%287.5m%2Fs%29)
J=![7.5*10^{-10}](https://tex.z-dn.net/?f=7.5%2A10%5E%7B-10%7D)
b) We know that the force is equal to:
F = J/t
where J is the impulse and t the time. So, replacing values, we get:
F = ![\frac{7.5*10^{-10}}{0.0003}](https://tex.z-dn.net/?f=%5Cfrac%7B7.5%2A10%5E%7B-10%7D%7D%7B0.0003%7D)
F = ![2.5*10^{-6}N](https://tex.z-dn.net/?f=2.5%2A10%5E%7B-6%7DN)
c) The weight W of the pollen grain is calculated as:
W = ![10^{-10}*9.8](https://tex.z-dn.net/?f=10%5E%7B-10%7D%2A9.8)
W = ![9.8*10^{-10}N](https://tex.z-dn.net/?f=9.8%2A10%5E%7B-10%7DN)
So, if we compare the force and the weight of the pollen grain, we get:
![\frac{2.5*10^{-6} }{9.8*10^{-10} } =2551.02](https://tex.z-dn.net/?f=%5Cfrac%7B2.5%2A10%5E%7B-6%7D%20%7D%7B9.8%2A10%5E%7B-10%7D%20%7D%20%3D2551.02)
it means that the force is 2551.02 times bigger than the weight of the pollen grain.
Answer:
The maximum depth of water in the tank shall be 22.784 centimeters.
Explanation:
The maximum height will be reached when the rate at which water enters the tank will be equal to the rate at which water will leave the vessel.
Let us assume that the maximum level of water in the tank is 'h' meters
Since the hole is at bottom
According to Torricelli's Law the speed at which the water shall leave the tank equals
![v=\sqrt{2gh}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2gh%7D)
Thus the rate at which water leaves the tank will be equal to
![Q_{out}=Area\times Speed](https://tex.z-dn.net/?f=Q_%7Bout%7D%3DArea%5Ctimes%20Speed)
![Q_{out}=7.00\times 10^{-2}\times \sqrt{2\times 981\times h}](https://tex.z-dn.net/?f=Q_%7Bout%7D%3D7.00%5Ctimes%2010%5E%7B-2%7D%5Ctimes%20%5Csqrt%7B2%5Ctimes%20981%5Ctimes%20h%7D)
Thus equating the rate of inlet of water and rate of outlet of water we get:
![14.8cm^{3}/s=7.00\times 10^{-2}\times \sqrt{2\times 981\times h}\\\\\therefore \sqrt{h}=\frac{14.8}{7.00\times 10^{-2}\times \sqrt{2\times 981}}\\\\\therefore \sqrt{h}=4.77\\\\\therefore h=22.784cm](https://tex.z-dn.net/?f=14.8cm%5E%7B3%7D%2Fs%3D7.00%5Ctimes%2010%5E%7B-2%7D%5Ctimes%20%5Csqrt%7B2%5Ctimes%20981%5Ctimes%20h%7D%5C%5C%5C%5C%5Ctherefore%20%5Csqrt%7Bh%7D%3D%5Cfrac%7B14.8%7D%7B7.00%5Ctimes%2010%5E%7B-2%7D%5Ctimes%20%5Csqrt%7B2%5Ctimes%20981%7D%7D%5C%5C%5C%5C%5Ctherefore%20%5Csqrt%7Bh%7D%3D4.77%5C%5C%5C%5C%5Ctherefore%20h%3D22.784cm)
One of the most common devices for measuring temperature<span> is the glass thermometer. This consists of a glass tube filled with mercury or some other liquid, which acts as the working fluid.</span>