Answer:
0.22 feet
Explanation:
Volume of cylinder = 3500 cubic feet = v
Height of cylinder = 4.3 miles
Convert to miles to feet
1 mile = 5280 feet
4.3 miles = 4.3×5280 = 22704 feet = h
Volume of cylinder
![v=\pi r^2h\\\Rightarrow r=\sqrt{\frac{v}{\pi h}}\\\Rightarrow r=\sqrt{\frac{3500}{\pi 22704}}\\\Rightarrow r=0.22\ ft](https://tex.z-dn.net/?f=v%3D%5Cpi%20r%5E2h%5C%5C%5CRightarrow%20r%3D%5Csqrt%7B%5Cfrac%7Bv%7D%7B%5Cpi%20h%7D%7D%5C%5C%5CRightarrow%20r%3D%5Csqrt%7B%5Cfrac%7B3500%7D%7B%5Cpi%2022704%7D%7D%5C%5C%5CRightarrow%20r%3D0.22%5C%20ft)
The radius of the hole is 0.22 feet (ignoring the thickness of the cylinder).
Poverty, Natural Disaster, and Disease are 3 answers.
Answer:
The rate of heat transfer of the second object is greater than the first object.
Explanation:
= Emissivity of the object
= Stefan-Boltzmann constant = ![5.67\times 10^{-8}\ \text{W/m}^2/\text{K}^4](https://tex.z-dn.net/?f=5.67%5Ctimes%2010%5E%7B-8%7D%5C%20%5Ctext%7BW%2Fm%7D%5E2%2F%5Ctext%7BK%7D%5E4)
= Temperature of surface 1 = ![25^{\circ}\text{C}+273.15=298.15\ \text{K}](https://tex.z-dn.net/?f=25%5E%7B%5Ccirc%7D%5Ctext%7BC%7D%2B273.15%3D298.15%5C%20%5Ctext%7BK%7D)
= Temperature of surface 2 = ![40^{\circ}\text{C}+273.15=313.15\ \text{K}](https://tex.z-dn.net/?f=40%5E%7B%5Ccirc%7D%5Ctext%7BC%7D%2B273.15%3D313.15%5C%20%5Ctext%7BK%7D)
= Surrounding temperature = ![25^{\circ}\text{C}+273.15=298.15\ \text{K}](https://tex.z-dn.net/?f=25%5E%7B%5Ccirc%7D%5Ctext%7BC%7D%2B273.15%3D298.15%5C%20%5Ctext%7BK%7D)
Rate of heat transfer is given by
![P_1=\varepsilon \sigma (T_1^4-T_0^4)\\\Rightarrow P_1=\varepsilon \sigma A_1(298.15^4-298.15^4)\\\Rightarrow P_1=0\ \text{W}](https://tex.z-dn.net/?f=P_1%3D%5Cvarepsilon%20%5Csigma%20%28T_1%5E4-T_0%5E4%29%5C%5C%5CRightarrow%20P_1%3D%5Cvarepsilon%20%5Csigma%20A_1%28298.15%5E4-298.15%5E4%29%5C%5C%5CRightarrow%20P_1%3D0%5C%20%5Ctext%7BW%7D)
![P_2=\varepsilon \sigma (T_2^4-T_0^4)\\\Rightarrow P_2=\varepsilon 5.67\times10^{-8} A_2(313.15^4-298.15^4)\\\Rightarrow P_2=\varepsilon A_297.2](https://tex.z-dn.net/?f=P_2%3D%5Cvarepsilon%20%5Csigma%20%28T_2%5E4-T_0%5E4%29%5C%5C%5CRightarrow%20P_2%3D%5Cvarepsilon%205.67%5Ctimes10%5E%7B-8%7D%20A_2%28313.15%5E4-298.15%5E4%29%5C%5C%5CRightarrow%20P_2%3D%5Cvarepsilon%20A_297.2)
![\varepsilon A_297.2>0](https://tex.z-dn.net/?f=%5Cvarepsilon%20A_297.2%3E0)
So, ![P_2>P_1](https://tex.z-dn.net/?f=P_2%3EP_1)
Hence, the rate of heat transfer of the second object is greater than the first object.
<u><em>Any type of energy is unlimited. Here is one:The solar energy is an unlimited source of energy.It helps charging electricity(natural). It also helps by wind.You may be wandering,how wind is formed?Here is the answer:The sun energy blows wind by heating seas,which causes wind to form.</em></u>
<u><em>Good luck!</em></u>
The aswer is b the golf ball experiences a greater acelleration