**Answer:**

An image of the cosmic microwave background radiation, taken by the European Space Agency (ESA)'s Planck satellite in 2013, shows the small variations across the sky (Image credit: ESA/Planck Collaboration) The cosmic microwave background (CMB) is thought to be leftover radiation from the Big Bang, or the time when the universe began

**Explanation:**

Capacitor in series with a 100Ω resistor and a 18.0 mH inductor will give a **resonance frequency **of 1000 Hz is **1.38F**

**Resonance Frequency **of a combination of Series LCR circuit is the frequency at which resonance is achieved in a circuit.

Resonance Frequency of a combination of Series LCR circuit is given by:

f = 1 / 2π

where, f is the resonance Resonance Frequency of a combination of Series LCR circuit

L is the Inductance of the inductor

C is the capacitance of the capacitor

Given,

f = 1000Hz

L = 18.0 mH = 0.018H

R = 100Ω

C = ?

On substituting the values in the above-mentioned formula:

1000 = 1 / 2π

2π = 0.001

On solving, C = 1.38 F

Hence, the capacitance of the given capacitor is **1.38F**.

Learn more about **Resonant frequency** here, brainly.com/question/13040523

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**Answer:**

I would make all the people depressed but that would be normal and all the happy people were considerd sped.

**Explanation:**

<span>Aristotle would say that an object comes to rest because it got tired. Aristotle came up with ideas, but never tested them.
Galileo used experiments and mathematical models to analyze motion. He used a slanted inclined plane an order to slow down the acceleration due to gravity on an object. He found out that an object accelerates as it falls. </span>

I believe the correct answer would be "A" energy source.