3 years ago

Which describes one event that causes an eclipse?

Physics

1 answer:

Burka [1]3 years ago

3 0

Answer:

Earths shadow covering the moon would create a lunar eclipse.

Explanation:

because i just know

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If a device uses 280 watts of power a day, about how many kilowatt-hours will it use in 30 days?

Novay_Z [31]

Answer:C

Explanation:

Power=280watts=280/1000 kilowatts

Power=0.28 kilowatts

Device use 0.28 kilowatts in 1 day

1day=24hours

Device use 0.28 kilowatts in 24hours

30days=30 x 24=720 hours

For 720 hours=(0.28x720) ➗ 24

For 720 hours=201.6 ➗ 24

For 720 hours=8.4

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3 years ago

1. Which letter represents the location of the battery in this diagram?

My name is Ann [436]

Answer:

location of battery in this diagram is at A and location of switch is at B.

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3 years ago

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. The penalties for a person's second DUI conviction include completion of __________ hours of DUI school.

Kobotan [32]

<span>The penalties for a person's second DUI conviction include completion of </span>21 hours of DUI school.

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3 years ago

Even when shut down after a period of normal use, a large commercial nuclear reactor transfers thermal energy at the rate of 150

Sever21 [200]

Answer: $2.89\approx 2.9^{\circ}C/s$

Explanation:

Given

$Power\left ( P\right )=150 MW$

mass of core $\left ( m\right )=1.60\times 10^5 kg$

Average specific heat $\left ( C\right )=0.3349 KJ/kg^{\circ}C$

And rate of increase of temperature = $\frac{\mathrm{d}T}{\mathrm{d} t}$

Now

P= $mc\frac{\mathrm{d}T}{\mathrm{d} t}$

$150\times 10^6=1.60\times 10^5\times 0.3349\times \frac{\mathrm{d}T}{\mathrm{d} t}$

Thus $\frac{\mathrm{d}T}{\mathrm{d} t}=[tex]\frac{1.60\times 10^5\times 0.3349}{150\times 10^6}$

$\frac{\mathrm{d}T}{\mathrm{d} t}=2.89\approx 2.9^{\circ}C/s$

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3 years ago

A physics student uses a spring loaded launcher to fire a 58 gram projectile horizontally. The projectile leaves the launcher at

timofeeve [1]

Answer:

no answer

Explanation:

the question does not sk what to find

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3 years ago