Answer:
810.94 m/s
Explanation:
Applying,
v = √(2gR)............. Equation 1
Where v = escape velocity of the spherical asteroid, g = acceleration due to gravity, R = radius of the earth
From the question,
Given: g = 0.636 m/s², R = 517 km = 517000 m
Substitute these values into equation 1
v = √(2×0.636×517000)
v = √(657624)
v = 810.94 m/s
Hence, the escape velocity is 810.94 m/s
Answer:
221.17 kJ
Explanation: Note the heat of vaporization is in kJ/mol,then to determine the number of moles of water: divide the mass by 18. Then multiply the number of moles by the molar heat of vaporization of water.
N = 97.6 ÷ 18
Q=molar heat *moles
Q = (40.79) * (97.6 ÷ 18)
This is approximately 221.17 kJ
Answer:
Ω
Explanation:
Given that
d(min,0)= 4 cm
d(min,1)= 14 cm
Voltage standingwave ratio = 1.5
Zo = 50 Ω
We know that
d(min,1) - d(min,0) = λ/2
Now by putting the values
14 - 4 = λ/2
λ = 20 cm
We also know that
β=2π/λ
β=2π/0.2 = 10π rad/m
So we can say that
θr= 2β d(min,n) - (2 n + 1)π rad
θr=2×10π ×0.04 −π = -0.2 π rad
We know that
π rad = 180 °
θr= = -0.2 π rad= -36 °
We know that
![\Gamma =\dfrac{S-1}{S+1}](https://tex.z-dn.net/?f=%5CGamma%20%3D%5Cdfrac%7BS-1%7D%7BS%2B1%7D)
Here S= 1.5
![\Gamma =\dfrac{S-1}{S+1}](https://tex.z-dn.net/?f=%5CGamma%20%3D%5Cdfrac%7BS-1%7D%7BS%2B1%7D)
![\Gamma =\dfrac{1.5-1}{1.5+1}](https://tex.z-dn.net/?f=%5CGamma%20%3D%5Cdfrac%7B1.5-1%7D%7B1.5%2B1%7D)
![\Gamma =0.2](https://tex.z-dn.net/?f=%5CGamma%20%3D0.2)
![Z_L=Z_o\dfrac{1+\Gamma }{1-\Gamma }](https://tex.z-dn.net/?f=Z_L%3DZ_o%5Cdfrac%7B1%2B%5CGamma%20%7D%7B1-%5CGamma%20%7D)
by putting the values
![Z_L=50\times \dfrac{1+0.2e^{-j36^{\circ}} }{1-0.2e^{-j36^{\circ}} }](https://tex.z-dn.net/?f=Z_L%3D50%5Ctimes%20%5Cdfrac%7B1%2B0.2e%5E%7B-j36%5E%7B%5Ccirc%7D%7D%20%7D%7B1-0.2e%5E%7B-j36%5E%7B%5Ccirc%7D%7D%20%7D)
Ω
Answer:
Useful Work = 899.8 J
Explanation:
Efficiency = ![\mathbf{\frac{Useful \ Work}{Total \ Work}\times100}](https://tex.z-dn.net/?f=%5Cmathbf%7B%5Cfrac%7BUseful%20%5C%20Work%7D%7BTotal%20%5C%20Work%7D%5Ctimes100%7D)
Useful Work = ![\mathbf{\frac{Efficiency\times Total \ Work}{100}}](https://tex.z-dn.net/?f=%5Cmathbf%7B%5Cfrac%7BEfficiency%5Ctimes%20Total%20%5C%20Work%7D%7B100%7D%7D)
Useful Work = ![\mathbf{\frac{81.8\times1100}{100}}](https://tex.z-dn.net/?f=%5Cmathbf%7B%5Cfrac%7B81.8%5Ctimes1100%7D%7B100%7D%7D)
Useful Work = 899.8 J
Therefore the amount of useful work done out of total work of 1100 J is 899.8 J by the pulley.
Thermal energy moves between objects through conduction. This is because, collisions made from the objects through the molecules.
Heat can also move in three different ways. Convection, conduction, and radiation.