Answer:
F = 3.55 x 10²² N
Explanation:
average distance of sun from earth = 1.5 × 10⁸ km
mass of earth = 6 x 10²⁴ kg
time = 365.25 days
distance = 2 π r
distance = 2 π x 1.5 x 10¹¹ m
= 3 π x 10¹¹ m
![v = \dfrac{d}{t}](https://tex.z-dn.net/?f=v%20%3D%20%5Cdfrac%7Bd%7D%7Bt%7D)
![v = \dfrac{3 \pi \times 10^{11}}{365.25 \times 24 \times 60 \times 60}](https://tex.z-dn.net/?f=v%20%3D%20%5Cdfrac%7B3%20%5Cpi%20%5Ctimes%2010%5E%7B11%7D%7D%7B365.25%20%5Ctimes%2024%20%5Ctimes%2060%20%5Ctimes%2060%7D)
v = 2.98 x 10⁴ m/s
we know centripetal force
![F = \dfrac{mv^2}{r}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7Bmv%5E2%7D%7Br%7D)
![F = \dfrac{6 \times 10^{24}\times (2.98\times 10^4)^2}{1.5\times 10^{11}}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7B6%20%5Ctimes%2010%5E%7B24%7D%5Ctimes%20%282.98%5Ctimes%2010%5E4%29%5E2%7D%7B1.5%5Ctimes%2010%5E%7B11%7D%7D)
F = 3.55 x 10²² N
<u>Answer:</u>
The acceleration of the plane and the time required to reach this speed is (a)= 7.5
and time(t) = 20 seconds
<u>Explanation:
</u>
Given data Initial velocity
= 0
Final velocity (
) = 150 m/second
Distance (d) = 1500 m
We have the formula, ![$\mathrm{V}_{\mathrm{f}}^{2}=\mathrm{V}_{\mathrm{i}}^{2}+2 \mathrm{ad}$](https://tex.z-dn.net/?f=%24%5Cmathrm%7BV%7D_%7B%5Cmathrm%7Bf%7D%7D%5E%7B2%7D%3D%5Cmathrm%7BV%7D_%7B%5Cmathrm%7Bi%7D%7D%5E%7B2%7D%2B2%20%5Cmathrm%7Bad%7D%24)
which gives
= 0+2a(1500)
22500 = 3000 a
acceleration (a) = 7.5 ![m/s^2](https://tex.z-dn.net/?f=m%2Fs%5E2)
![$\mathrm{V}_{\mathrm{f}}=\mathrm{V}_{\mathrm{i}}+\mathrm{at}$](https://tex.z-dn.net/?f=%24%5Cmathrm%7BV%7D_%7B%5Cmathrm%7Bf%7D%7D%3D%5Cmathrm%7BV%7D_%7B%5Cmathrm%7Bi%7D%7D%2B%5Cmathrm%7Bat%7D%24)
150 = 7.5 t
t= 150/7.5 = 20
t = 20 seconds.
Ionization energy is that energy !!!
87.69 grams of calcium metal is required to react with 7.75 g water to produce calcium hydroxide and hydrogen gas.
Ca (OH)2+2H2 = CaH2 + 2H2O
Convert grams of hydrogen to moles of hydrogen.
H2 has a molar mass of 2.016 g/mol.
1 mol H2 x 8.400g H2
2.016g H2 equals 4.1667 mol H2
Calculate the moles of CaH2 using the molar ratio.
The molar ratio is 1 mol CaH2: 2 mol H2, according to the equation that is balanced.
2.0833 mol CaH2 = 4.1667 mol H2 1 mol CaH2 2 mol H2
grams of CaH2 to CaH2
CaH2 has a molar mass of 42.09 g/mol.
1.mol CaH2=87.69 g CaH2 2.0833mol CaH2=42.09 g CaH2
87.69 g CaH2 are required for the reaction.
Learn more about moles here-
brainly.com/question/26416088
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Answer:
e)
Explanation:
In an RC series circuit, at any time, the sum of the voltages through the resistor and the capacitor must be constant and equal to the voltage of the DC voltage source, in order to be compliant with KVL.
At= 0, as the voltage through the capacitor can't change instantaneously, all the voltage appears through the resistor, which means that a current flows, that begins to charge the capacitor, up to a point that the voltage through the capacitor is exactly equal to the DC voltage, so no current flows in the circuit anymore, and the charge in the capacitor reaches to its maximum value.