The particle with sharp ends have the slowest rate of deposition
Answer: Option C
<u>Explanation:</u>
As per aerosol physics, deposition is a process where aerosol particles accumulate or settle on solid surfaces. Thereby, it reduces the concentration of particles in the air. Deposition velocity (rate of deposition) defines from F = vc, where v is deposition rate, F denotes flux density and c refers concentration.
Deposition velocity is slowest for particles of intermediate-sized particles because the frictional force offers resistance to the flow. Density is directly proportional to the deposition rate so clearly shows that high-density particles settle faster. Due to friction, round and large-sized particles deposit faster than oval/flattened sediments.
Answer:
It is not correct.
The correct conversion is:
1030 KJ = 246.18 KCal.
Explanation:
To know if 1030 KJ is equivalent to 245 KCal, we shall convert 1030 kJ to kcal. This can be obtained as follow:
4.184 KJ = 1 KCal
Therefore,
1030 KJ = 1030 KJ × 1 KCal / 4.184 KJ
1030 KJ = 246.18 KCal.
Thus, 1030 KJ is equivalent to 246.18 KCal.
From the above calculation, we can see that:
1030 KJ ≠ 245 KCal
Rather,
1030 KJ = 246.18 KCal.
Answer:
B)a tool to drop temperatures, mercury, an electric current, and a tool to measure resistance
(a) The momentum of a moving object is given by:
![p=mv](https://tex.z-dn.net/?f=%20p%3Dmv%20)
where m is the mass of the object and v is its speed. In this problem, the mass of the elephant is
and its speed is
, therefore its momentum is
![p=(2000 kg)(7.50 m/s)=15000 kg m/s](https://tex.z-dn.net/?f=%20p%3D%282000%20kg%29%287.50%20m%2Fs%29%3D15000%20kg%20m%2Fs%20)
(b) We can use the same formula to calculate the momentum of the tranquilizer dart, whose mass is
and whose speed is
:
![p=mv=(0.04 kg)(600 m/s)=24 kg m/s](https://tex.z-dn.net/?f=%20p%3Dmv%3D%280.04%20kg%29%28600%20m%2Fs%29%3D24%20kg%20m%2Fs%20)
we see that the elephant's momentum is much larger than the momentum of the dart.
(c) Again, using the same formula, the mass of the hunter is
, his speed is
, therefore his momentum is
![p=mv=(90 kg)(7.40 m/s)=666 kg m/s](https://tex.z-dn.net/?f=%20p%3Dmv%3D%2890%20kg%29%287.40%20m%2Fs%29%3D666%20kg%20m%2Fs%20)