4 years ago

Five ways to calculate speed without speedometer

Physics

1 answer:

QveST [7]4 years ago

8 0

One way is speed=distance divided by time

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The relationship between voltage, E, current, I, and resistance, Z, is given by the equation E = IZ. If a circuit has a current

Alex787 [66]

By definition, we have to:

$E = IZ$

Where,

E: voltage

I: current

Z: Resistance

To calculate the voltage value, we must replace the following values in the given equation:

$I = 3 + 2i\\Z = 2 - i$

We have then:

$E = (3 + 2i) (2 - i)$

Making the product of complex numbers we have:

$E = (3 * 2 - 3i) + (4i - 2i ^ 2)\\E = (6 - 3i) + (4i - 2 (-1))\\E = (6 - 3i) + (4i +2)$

$E = (6 + 2) + (4-3) i\\E = 8 + i$

Answer:

the voltage of the circuit is:

$E = 8 + i$

option C

7 0

3 years ago

Read 2 more answers

A solar heating system has a 25.0% conversion efficiency; the solar radiation incident on the panels is 1 000 W/m2.

Llana [10]

Answer:

Rise in temperature will be $28.7^{\circ}C$

So option (c) will be the correct answer

Explanation:

We have given solar radiation on the panels $=1000w/m^2$

25 % of the conversion efficiency = 25 % 1000 = 250

Area is given $A=4m^2$

So radiated power $P=250\times 4=1000watt$

Time is given t = 1 hour = 3600 sec

So energy $E=power\times time=1000\times 3600=3.6\times 10^6J-sec$

Mass of water m = 30 kg

And $c_w=4.186$

So rise in temperature $\Delta T=\frac{Energy}{m\times c_w}=\frac{3.6\times 10^6}{30\times 4.186}=28.7^{\circ}C$

So option (c) will be the correct option

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4 years ago

A strand of 10 lights is plugged into an outlet. How can you determine if the lights are connected in series or paralle

KengaRu [80]

C. unscrew one light. if other lights turn off its a series circuit

I took the test

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3 years ago

Opposite poles attract (N-S) while similar poles (N-N or S-S) repel.

Margaret [11]

That’s True (N-S) attract and (N-N or S-S) repel

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3 years ago

During crystallisation the crystals separate out from the hot ________solution of a substance on cooling

alekssr [168]

Answer:

The process of separation or deposition of crystals from a hot saturated solution on gentle cooling of the solution is called 'crystallisation'.

Explanation:

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3 years ago