Balance this chemical equation Fe(s) + 02(g) --- Fe0(s)

Physics

1 answer:

Softa [21]3 years ago

6 0

2Fe(s) + O2 -> 2FeO(s)

2 'Fe' atoms on both sides 
2 'O' atoms on both sides

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10points asap A force of 30 N acts upon a 7 kg block. Calculate its acceleration.

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Hello! Assuming that the only force acting on the mass is 30N...

Fnet = 30N
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a = 30N / 7kg
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Below is a circuit schematic of sources and resistors (Figure 3). VS = 10V , R1 = 100Ω, R2 = 50Ω, R3 = 25Ω, IS = 2A. Calculate t

lorasvet [3.4K]

Answer:

$V_3\approx 4.28\,\,V$

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Explanation:

Notice that this is a circuit with resistors R1 and R2 in parallel, connected to resistor R3 in series. It is what is called a parallel-series combination.

So we first find the equivalent resistance for the two resistors in parallel:

$\frac{1}{Re}= \frac{1}{R1}+\frac{1}{R2}\\\frac{1}{Re}= \frac{1}{100}+\frac{1}{50}\\\frac{1}{Re}= \frac{3}{100}\\Re=\frac{100}{3} \,\,\Omega$