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3 years ago

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A circuit has a known resistance of 5 Ohms. An ammeter in the circuit gives a reading of 5 Amps. What is the Voltage of the circ

uit?

1 answer:

artcher [175]3 years ago

5 0

E = I R

Voltage = (current)×(resistance).

V = 5A x 5 ohms = 25 volts.

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A piano wire with mass 2.60g and length 84.0 cm is stretched with a tension of 25.0 N. A wave with frequency 120.0 Hz and amplit

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Answer:

Power will be 0.2023 watt

And when amplitude is halved then power will be 0.0505 watt

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So mass density $\mu =\frac{m}{l}=\frac{0.0026}{0.84}=0.0031kg/m$

Tension in the wire T = 25 N

Frequency f = 120 Hz

So angular frequency $\omega =2\pi f=2\times 3.14\times 120=753.6rad/sec$

And amplitude A = 1.6 mm = 0.0016 m

We have to find the generated power

Power is given by $P=\frac{1}{2}\sqrt{\mu T}\omega ^2A^2=\frac{1}{2}\times \sqrt{0.0031\times 25}\times 753.6^2\times 0.0016^2=0.2023watt$

From the relation we can see that power $P\ \propto\ A^2$

So if amplitude is halved then power will be $\frac{1}{4}$ times

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A block of aluminum occupies a volume of 15.0 ml and weighs 40.5 what is its density

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D = 40.5 g / 15.0 mL<span>d = 2.70 g/mL</span>

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I would assume that the magnesium would have to come into contact with an ion in order to become a magnesium ion.

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Kruka [31]

Answer:

20m/s

Explanation:

acceleration=final velocity-initial velocity/time

4.0m/s²=v m/s-0m/s/5.0sec

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