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ss7ja [257]
3 years ago
13

13. You push with 56 N on a 15-kg box, and there is a 23-N force of friction. How fast will the box accelerate?

Physics
1 answer:
Flura [38]3 years ago
4 0

Answer:

The acceleration is 2.2 m/s^2

Explanation:

In the attached image, we can see the free body diagram. And using the second law of Newton it will be possible to find the acceleration of the box.

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Which facility relies on a no renewable source of energy
Rainbow [258]

Answer:

Coal

Explanation:

4 0
3 years ago
Blaise Pascal duplicated Torricelli's barometer using a red Bordeaux wine of density 965 kg/m3 as the working liquid (see figure
pogonyaev

Answer:

a) h=10.701m

b) No. On this case a liquid like wine is not good as the mercury, because the wine is composed of water, alcohol and other elements, but specially the alcohol evaporates much easier than the mercury, and that will cause malfunction in the vacuum of the baroemter used for the experiment.

Explanation:

The Torricelli's experiment "was invented by the Italian scientist Evangelista Torricelli and the most important purpose of this experiment was to prove that the source of vacuum comes from atmospheric pressure"

Pressure is defined as "the force that is applied on any object in the direction perpendicular to the surface of the object in the unit area is known as the pressure. There are various types of pressure".

Part a

We have the density for the red Bordeaux wine given \rho=965\frac{kg}{m^3}, the atmospheric pressure on the Toriccelli's barometer is given by:

P_{atm}=\rho g h

Solving for the height of wine in the column we have this:

h=\frac{P_{atm}}{\rho g}

And replacing we have:

h=\frac{101300Pa}{965\frac{kg}{m^3} 9.81\frac{m}{s^2}}=10.701 m

So the height of the red Bordeaux wine would be h=10.701m. A very high value on this case if we compare with the usual values for this variable.

Part b

No. On this case a liquid like wine is not good as the mercury, because the wine is composed of water, alcohol and other elements, but specially the alcohol evaporates much easier than the mercury, and that will cause malfunction in the vacuum of the baroemter used for the experiment.

5 0
3 years ago
calculate the momentum of 5.07 kg egg that is dropped from a roof and falls 2 seconds before hitting the ground.
inysia [295]
Anything that's dropped on or near the Earth accelerates at the rate of
9.8 m/s² on its way down.  The mass of the object makes no difference. 
After falling for 2 seconds, it's falling at the rate of 19.6 m/s.

Momentum = (mass) x (speed)

The egg's momentum is   (5.07 kg) x (19.6 m/s) = 99.4 kg-m/s .
8 0
3 years ago
An airplane flies at 400 km/h in a 100km/h hurricane crosswind. Find the resultant speed of the plane.
kow [346]
I think the airplan flies in same speed 400
5 0
3 years ago
. The penalties for a person's second DUI conviction include completion of __________ hours of DUI school.
Kobotan [32]
<span>The penalties for a person's second DUI conviction include completion of </span>21 hours of DUI school.


4 0
3 years ago
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