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julsineya [31]
3 years ago
5

An object has positive velocity and negative acceleration, what does this mean?

Physics
1 answer:
kap26 [50]3 years ago
4 0

Answer:

the object is moving forward but it is slowing down

Explanation:

negative acceleration becomes when the intiall velocity becomes greater than the final which means if it is initially greater but finally smaller that means it is slowing down but moving forward

hope it helps

for any question comment me ❤❤

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39 g aluminum spoon (specific heat 0.904 J/g·°C) at 24°C is placed in 166 mL (166 g) of coffee at 83°C and the temperature of th
tatuchka [14]

<u>Answer:</u> The final temperature of the solution is 80.14^oC

<u>Explanation:</u>

The amount of heat released by coffee will be absorbed by aluminium spoon.

Thus, \text{heat}_{absorbed}=\text{heat}_{released}

To calculate the amount of heat released or absorbed, we use the equation:  

Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})

Also,

m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]    ..........(1)

where,

q = heat absorbed or released

m_1 = mass of aluminium = 39 g

m_2 = mass of coffee = 166 g

T_{final} = final temperature = ?

T_1 = temperature of aluminium = 24^oC

T_2 = temperature of coffee = 83^oC

c_1 = specific heat of aluminium = 0.904J/g^oC

c_2 = specific heat of coffee= 4.1801J/g^oC

Putting all the values in equation 1, we get:

39\times 0.904\times (T_{final}-24)=-[166\times 4.1801\times (T_{final}-83)]

T_{final}=80.14^oC

Hence, the final temperature of the solution is 80.14^oC

4 0
3 years ago
Where does the energy that is used to ride a bicycle up a hill come from and how is it classified?
MariettaO [177]
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7 0
3 years ago
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Olegator [25]
<span>lying on the couch


:)

</span>
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3 years ago
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Copy and Complete the Sentence
max2010maxim [7]

Answer:

When something happens, energy is changed from one form into another.

Explanation:

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