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Serga [27]
3 years ago
12

How much energy is required to raise the temperature of 5g of air by 10°C?

Physics
1 answer:
Alex777 [14]3 years ago
4 0
You need to know the specific heat capacity of air.
Then energy needed = 0.005 x sp.heat.cap x 10
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Question 4 How much time does it take to walk 8 km north at a velocity of 3.8 km/h?​
IrinaVladis [17]

Given parameters:

Displacement = 8km

Velocity  = 3.8km/h

Unknown:

time  = ?

Solution:

Velocity is displacement divided by time.

  Velocity  = \frac{displacement}{time}  

      Displacement  = velocity x time

Input the parameters:

              8  = 3.8  x time

 Time  = \frac{8}{3.8}   = 2.1s

The time taken is 2.1s

6 0
3 years ago
A railroad car of mass 20000 kg and velocity 5.0 m s to the right collides completely elastically in a head on collision with a
Montano1993 [528]

Answer:

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Explanation:

4 0
3 years ago
Chewy travels an average of 22 mph, how many hours does it take him to cover a 110 mike course?
anzhelika [568]
That would be 110/22, which is 5 hours
5 0
3 years ago
Feedback is _____?
Nat2105 [25]
The first choice Always given to you by other people

I hope this helped :3
7 0
3 years ago
Read 2 more answers
Model rocket engines are rated by the impulse that they deliver when they fire. A particular engine is rated to deliver an impul
abruzzese [7]

Answer:

Final speed of the rocket, \Delta v= 29.16\ m/s

Explanation:

It is given that,

Impulse delivered by an engine, J = 3.5 kg-m/s

Mass of the rocket, m = 120 g = 0.12 kg

To find,

The final speed of the rocket

Solution,

We know that the impulse is equal to the product of mass and velocity o it is equivalent to the change in momentum of an object.

J=\Delta P=m\times \Delta v

\Delta v=\dfrac{J}{m}

\Delta v=\dfrac{3.5\ kg-m/s}{0.12\ kg}

\Delta v= 29.16\ m/s

So, the final speed of the rocket once the engine has fired is 29.16 m/s.

4 0
3 years ago
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