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3 years ago

Choose the false statement regarding resistance.

Physics

2 answers:

konstantin123 [22]3 years ago

5 0

Answer:

I think is C

Please mark me as brainliest

Afina-wow [57]3 years ago

4 0

Answer:

i think D I hope this helps!!!!

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The material that is most difficult to recycle is aluminum.

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Who was the last person to step on the moon?

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Eugene Cernan was not the last, but he was the most recent.

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An orienteer runs north at 5 m/s for 120 seconds, and then west at 4 m/s for 180 seconds. Provide a graphic solution to show the

Ivan

Answer:937.22 m

Explanation:

Given

First orienteer is running towards North with 5 m/s for 120 s

so he covers a distance of $5\times 120=600 m$

After that He runs towards west at 4 m/s for 180 s

So he covers a distance of $4\times 180=720 m$

Mathematically its net Displacement is

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3 years ago

Which unit measures mass?

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Kilogram measure mass

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4 years ago

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A 0.4000 kg sample of methanol at 16.0ºC is mixed with 0.4000 kg of water at 85.0ºC. Assuming no heat loss to the surroundings,

AVprozaik [17]

Answer:

T_finalmix = 59.5 [°C].

Explanation:

In order to solve this problem, a thermal balance must be performed, where the heat is transferred from water to methanol, at the end the temperature of the water and methanol must be equal once the thermal balance is achieved.

$Q_{water}=Q_{methanol}$

where:

$Q_{water}=m_{water}*Cp_{water}*(T_{waterinitial}-T_{final})$

mwater = mass of the water = 0.4 [kg]

Cp_water = specific heat of the water = 4180 [J/kg*°C]

T_waterinitial = initial temperature of the water = 85 [°C]

T_finalmix = final temperature of the mix [°C]

$Q_{methanol}=m_{methanol}*Cp_{methanol}*(T_{final}-T_{initialmethanol})$

Now replacing:

$0.4*4180*(85-T_{final})=0.4*2450*(T_{final}-16)\\142120-1672*T_{final}=980*T_{final}-15680\\157800=2652*T_{final}\\T_{final}=59.5[C]$

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3 years ago