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blsea [12.9K]
3 years ago
12

Is cold air heavier than warm air?

Physics
2 answers:
vovikov84 [41]3 years ago
5 0
<span>Air has mass and density. Yes, cold air is heavier than warm air. Cold air sinks because it is denser compared to warm air.  On the other hand, warm air rises because it is lighter.   </span> When the air is hot or warm, its molecules are much further when it’s cold, its molecules are slightly packed closer which is why it moves slower. <span>
The best association to this is the hot air balloon.  Hot air balloons fly because they are filled with hot air. Hot air is lighter than the cold air outside because when it is heated up, it expands making it lighter.</span>  


BigorU [14]3 years ago
5 0

If you have equal volumes of cold air and warm air ... two quart jars,
two gallon jugs, or two 1-cubic-foot balloons full of each ... then the
sample of cold air is more dense and therefore heavier than the
equal-size sample of warm air.

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Calculate the total energy of 2.0 kg object moving horizontally at 10 m/s 50 meters above the surface
mina [271]
We have:

Total Energy: KE + GPE
KE (Kinetic Energy) = \frac{1}{2} m*v^2
GPE (Gravitational Potential Energy) = m*g*h

Data:
m (mass) = 2.0 Kg
v (speed) = 10 m/s
h (height) = 50 m
Use: g (gravity) = 10 m/s²

Formula:

Total Energy: KE + GPE
TE =  \frac{1}{2} m*v^2 + m*g*h

Solving:
TE = \frac{1}{2} m*v^2 + m*g*h
TE = \frac{1}{2} *2.0*10^2 + 2.0*10*50
TE =  \frac{2.0*100}{2} + 1000
TE =  \frac{200}{2} + 1000
TE = 100 + 1000
\boxed{\boxed{TE = 1100\:Joule}}\end{array}}\qquad\quad\checkmark


5 0
3 years ago
Read 2 more answers
If a box is pulled with a force of 100 N at an angle of 25
love history [14]

The X and Y components of the force are 90.63 Newton and 42.26 Newton respectively.

<u>Given the following data:</u>

  • Force = 100 Newton.
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To determine the X and Y components of the force:

<h3>The horizontal component (X) of a force:</h3>

Mathematically, the horizontal component of a force is given by this formula:

F_x = Fcos \theta\\\\F_x =100 \times cos25\\\\F_x =100 \times 0.9063

Fx = 90.63 Newton.

<h3>The vertical component (Y) of tensional force:</h3>

Mathematically, the vertical component of a force is given by this formula:

F_y = Fsin \theta\\\\F_y =100 \times sin25\\\\F_y =100 \times 0.4226

Fy = 42.26 Newton.

Read more on horizontal component here: brainly.com/question/4080400

6 0
2 years ago
Jack is wearing a red shirt the shirt is illuminated with white light. The shirt absorbs every color but.....?
crimeas [40]

Answer:

the answer is red

Explanation:

the answer is red

4 0
3 years ago
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Word ProNems:
siniylev [52]

Answer:

a:it speed up

b:it should be positive since final

velocity is larger than initial velocity

c:acceleration is approximately 4.5

m/s^2

Explanation:

initial velocity=u=4.47m/s

Final velocity=v=17.9m/s

Time=t=3 seconds

a:the car speed up since the velocity

increased

b:change in velocity is positive

because final velocity is larger than

initial velocity

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c: acceleration=(v-u)/t

acceleration=(17.9-4.47)/3

acceleration=13.43/3

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7 0
3 years ago
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gayaneshka [121]

Answer:

To save the unnecessary bills and carbon emissions.

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2. Saving energy for the future generations as we know low demand would save the sources.

3. Energy efficiency is also important to society in environmental ways at efficient energy means low carbon emissions.

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4 years ago
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