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3 years ago

Write HCl+MgO---> MgCl 2 + H 2 O as a balanced chemical equation

Physics

1 answer:

Effectus [21]3 years ago

3 0

2HCl + MgO ---> MgCl2 + H2O

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Which of the following best describes a plane?

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3 years ago

Suppose that the electric field in the Earth's atmosphere is E = 8.60 101 N/C, pointing downward. Determine the electric charge

asambeis [7]

Answer:

q = 3.87 x 10⁵ C

Explanation:

given,

Electric field, E = 8.60 x 10¹ = 86 N/C

radius of earth, R = 6371 Km = 6.371 x 10⁶ m

Coulomb constant, K = 9 x 10⁹ N · m²/C²

Charge on the earth = ?

the electric field at the point

$E =\dfrac{kq}{r^2}$

$q =\dfrac{Er^2}{k}$

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$q =\dfrac{86\times (6.371\times 10^6)^2}{9\times 10^{9}}$

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after a circuit has been turned off, so it is important to make sure they are discharged before you touch them. Suppose a 120 mF

Snezhnost [94]

Answer:

The time is $110.16\times10^{-3}\ sec$

Explanation:

Given that,

Capacitor = 120 μF

Voltage = 150 V

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Current = 50 mA

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Using formula of discharge current

$i_{0}=\dfrac{V_{0}}{R}$

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$i_{0}=\dfrac{150}{1.8\times10^{3}}$

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We need to calculate the time

Using formula of current

$i=\dfrac{V_{0}}{R}e^{\frac{-t}{RC}}$

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$\dfrac{-t}{RC}=ln(0.600)$

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$t=110.16\times10^{-3}\ sec$

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