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Temka [501]
3 years ago
8

What is the current through the battery if the switch S is opened

Physics
1 answer:
Sladkaya [172]3 years ago
4 0

Answer: So, our current when our switch is open is going to be equal to the voltage across the resistors, and that's going to be our 12 volts, 12 volts, divided by the equivalent resistance of these resistors. When the switch is open, essentially, we just have R1 and R2 in series, and so this is just gonna be R1+R2.

Hope this helps......... Stay safe and have a Merry Christmas!!!!!! :D

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A spinning flywheel has rotational inertia I = 474.0 kg·m2. Its angular velocity decreases from 26.2 rad/s to zero in 204.0 s du
Flura [38]

Answer:

\tau = 60.88 N.m

Explanation:

given,

rotational inertia, I = 474.0 kg·m²

decrease in angular velocity

ω₁ = 26.2 rad/s        ω₂ = 0 rad/s

time = 204 s

torque = ?

\tau = I \alpha

\alpha = \dfrac{\omega_1-\omega_2}{t}

\alpha = \dfrac{26.2-0}{204}

   α = 0.128 rad/s²

\tau = I \alpha

\tau = 474\times 0.128

\tau = 60.88 N.m

frictional torque acting by the flywheel is equal to 60.88 N.m

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3 years ago
How much time would it take to go up to the moon and back
marusya05 [52]

That completely depends on your speed and the trajectory (path) you choose.

The Apollo missions took about 3 days each way.

The New Horizons spacecraft passed the moon within a couple of hours after it was launched.

4 0
3 years ago
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What is the equivalent unit to a newton?​
allsm [11]
My science teacher said that there is no equivalent unit to a newton
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4 years ago
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A green light has a wavelength of 485 nm.<br> What is its frequency? (1 nanometer is 10-9 m)
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3 years ago
A mercury atom in the ground state absorbs 20.00 electronvolts of energy and is ionized by losing an electron. How much kinetic
sukhopar [10]
We are given a mercury atom in the ground state which absorbs 20 eV of energy. It is then ionized by losing an electron. We need to calculate the kinetic energy that the electron has after ionization.

The initial energy is 20 eV = 20 J/C
The electron charge is = 1.60217662 × 10-19<span> coulombs

To determine the kinetic energy, we can use this equation:

KE = 20 Joules / Coulombs * </span>1.60217662 × 10-19<span> coulombs 
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Therefore, the amount of kinetic energy that the electron has after ionization is </span>1.25x10^20 Joules or 1.25x10^17 kJ. <span />
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