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4 years ago

Help pleaseeeeeeeeeeeeee

Physics

1 answer:

kap26 [50]4 years ago

7 0

The frictional force is in the opposite direction

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What would happen to moon if gravity no longer affected it?

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Answer: The moon would continue to move on its orbital path.

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3 years ago

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Which segments show changes of state that absorb heat? Check all that apply.

Nat2105 [25]

Answer:

B-C

D-E

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3 years ago

A heavy steel cable attached to a motor is lifting a girder. The girder is speeding up.

Yanka [14]

Answer: part a) both the tension and gravity vectors will be pointing downwards.

part b) the tension vector will be pointing upwards and the gravity will be pointing downwards.

Explanation:

part a) Since you are looking at the FBD for the steel cable here, the tension will be pointing downwards because the girder is hung from the cable which creates a downwards tension. Gravity will always point downwards, to the ground.

part b) Since you are looking at the FBD for the girder here, the tension will be pulled upwards because the cable is weighted which creates an upwards tension. Gravity will always point downwards, to the ground.

Sorry for the poor explanation, but hopefully this makes sense.

8 0

3 years ago

With what type of electromagnetic radiation would you observe:

Viefleur [7K]

Answer:

Green part of the visible spectrum.

X ray part of the electromagnetic spectrum.

Infrared part of the electromagnetic spectrum.

Explanation:

Wien's displacement law

$\lambda_{max}=\frac{b}{T}$

Where, b = Wien's displacement constant = 2.898×10⁻³ mK

T = Temperature in kelvin

$\lambda_{max}=\frac{2.898\times 10^{-3}}{5800}\\\Rightarrow\lambda_{max}=0.499\times 10^{-6}=0.5\mu m=500\ nm$

So, the wavelength would be of around the green part of the visible spectrum.

$\lambda_{max}=\frac{2.898\times 10^{-3}}{1\times 10^6}\\\Rightarrow\lambda_{max}=2.898\times 10^{-9}=2.898\ nm$

So, the wavelength would be of around the X ray part of the electromagnetic spectrum.

Human body temperature = 37°C = 37+273.15 = 310.15 K

$\lambda_{max}=\frac{2.898\times 10^{-3}}{37+273.15}\\\Rightarrow\lambda_{max}=\frac{2.898\times 10^{-3}}{310.15}\\\Rightarrow\lambda_{max}=9.34\times 10^{-6}=934\ nm$

So, the wavelength would be of around the Infrared part of the electromagnetic spectrum.

5 0

3 years ago

Your friend asks you for a glass of water and you bring her 5 milliliters of water. Is this more or less than what she was proba

Eddi Din [679]

Probably not what you were expecting... the average bottle of water is 24 ounces. 5 milliliters is about the amount of water in a spoon. Hope this helps!!!

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3 years ago