1 year ago

How far away is the closest star?

Physics

2 answers:

sukhopar [10]1 year ago

8 0

Answer: Proxima Centauri is the closet star about 40,208,000,000,000 km away.

Explanation:

balu736 [363]1 year ago

4 0

Answer:

The closest star is about 25,300,000,000,000 miles (39,900,000,000,000 kilometers) away

Explanation:

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Plucking a guitar string is a physical change; however, the process produces sound. Explain. plz heip

Vlad [161]

The vibration of the string moves the surrounding air molecules. The air molecules move in the form of a wave, traveling a distance dependent upon the magnitude of the vibration.

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3 years ago

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2 years ago

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What is the voltage in a circuit if the current is 8.5 a and the resistance is 18 ohms

ahrayia [7]

Answer:

153 volts

Explanation:

Ohm's Law states that voltage is equal to the current multiplied by the voltage of the circuit:

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2 years ago

Calculate the ratio of the drag force on a passenger jet flying with a speed of 950 km/h at an altitude of 10 km to the drag for

gulaghasi [49]

Answer:

14.18

Explanation:

given,

Speed of passenger jet,v₁ = 950 Km/h

Altitude of flight, h₁ = 10 km

Prop-driven speed,v₂ = 950/5 = 190 Km/h

altitude,h₂ = 5 Km

density of air at 10 Km = 0.38 Kg/m³

density of air at 5 Km = 0.67 Kg/m³

Drag force formula

$F = \dfrac{1}{2}C\rho Av^2$

now, ratio of drag Force

$\dfrac{F_{jet}}{F_{prop}}=\dfrac{\dfrac{1}{2}C\rho_{10} Av_{1}^2}{\dfrac{1}{2}C\rho_{5} Av_2^2}$

$\dfrac{F_{jet}}{F_{prop}}=\dfrac{\rho_{10} v_{1}^2}{\rho_{5}v_2^2}$

$\dfrac{F_{jet}}{F_{prop}}=\dfrac{0.38\times 950^2}{0.67\times 190^2}$

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3 years ago

Please help.

Vanyuwa [196]

I'm gonna go with unbalanced force because ^^

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3 years ago

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