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3 years ago

The frequency of an FM radio station is 89.3 MHz. Calculate its period.

1 answer:

5 0

The period of any wave is 1 / (its frequency).

89.3 MHz means 89.3 million per second

1 / (89.3 million per second) = 1.12 x 10⁻⁸ second.

That's 0.0000000112 second.

0.0112 microsecond

11.2 nanoseconds

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Answer:

$W=17085KJ$

Explanation:

From the question we are told that:

Height $H=16m$

Radius $R=3$

Height of water $H_w=9m$

Gravity $g=9.8m/s$

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Generally the equation for Volume of water is mathematically given by

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Where

y is a random height taken to define dv

Generally the equation for Work done to pump water is mathematically given by

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Substituting dv

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$dw=\frac{\rho*g*R^2}{H^2}(H-y)^3dy$

Therefore

$W=\int dw$

$W=\int(\frac{\rho*g*R^2}{H^2}(H-y)^3)dy$

$W=\rho*g*R^2}{H^2}\int((H-y)^3)dy)$

$W=\frac{1000*9.8*3.142*3^2}{9^2}[((9-y)^3)}^9_0$

$W=3420.84*0.25[2401-65536]$

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