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3 years ago

Why does the momentum before a collision equal the momentum after a collision?

Physics

2 answers:

Art [367]3 years ago

8 0

Answer: Correct option is C) because momentum is conserved

Explanation:

According to law of conservation of linear momentum if net external force on a system is zero then the total momentum of the system will be conserved .

<u>For a collision occurring between object 1 and object 2 in an isolated system</u>

If we consider the two colliding object as a single system then while collision the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

Thus momentum before collision equal the momentum after a collision because momentum is conserved .

kotykmax [81]3 years ago

3 0

The answer is C. Due to conservation of momentum.

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A normal blood pressure reading is less than 120/80 where both numbers are gauge pressures measured in millimeters of mercury (m

KIM [24]

The pressure value is given by the equation,

$P= \rho gh$

Where,

$\rho$ represents the density of the liquid

g= gravity

h= Heigth

A) For the measurement of the guage pressure we have the data data,

$\rho_{mercury} = 13.6*10^3kg/m^3$

$h=0.0930m$

$g=9.8m/s^2$

Replacing we get,

$P_g=\rho_{mercury}gh$

$[tex]P_g = (13.6*10^3)(9.8)(0.0930)$ P_g = 12395Pa[/tex]

In order to find the Absolute pressure, we perform a sum between the atmospheric pressure and that of the Gauge,

B) The atmospheric pressure at sea level is 101325Pa, assuming ideal conditions, we will take this pressure for our calculation, so

$P_T = P_a+P_g\\P_T = 101325Pa+12395Pa\\P_T = 113720Pa\\P_T = 113.7kPa$

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3 years ago

Would tap water likely freeze and boil at those exact temperatures? (temperature freezes at 0 degree celius and boils at 100 deg

Kitty [74]

Explanation:

Tap water will not boil and freeze at those exact temperature which are the boiling and freezing points.

O°C and 100°C are the boiling points of pure water.

Pure water is a pure substance with a definite composition made up of 2 atoms of hydrogen and 1 atom of oxygen.

Pure water boils at 100°C and freezes at O°C ,

Tap water is not pure water.
It has some impurities in it which causes causes the elevation of the boiling point of liquids and widening of the boiling range.
Tap water is treated water that contains some other dissolved chemicals.

learn more:

Molecular formula brainly.com/question/4574324

#learnwithBrainly

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3 years ago

The measure of the force of gravity on an object, expressed as mass of the object times acceleration due to gravity is called

gulaghasi [49]

The measure of the force of gravity on an object, expressed as mass of the object times acceleration due to gravity is called

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3 years ago

NASA communicates with the Space Shuttle and International Space Station using Ku-band microwave radio. Suppose NASA transmits a

jeyben [28]

Answer:

λ₁ = 2.50 10⁻² m, λ₂ = 1.66 10⁻² m

Explanation:

Microwave communication is very efficient because it does not have atmospheric interference, for which it is widely used and has been regulated to avoid interference, the ku band is in the range between 12 and 18 GHz.

Let's calculate the wavelength for the two extreme frequencies of this band

wavelength and frequency are related

c = λ f

λ = c / f

f₁ = 12 GHz = 12 10⁹ Hz

λ₁ = 3 10⁸ /12 10⁹

λ₁ = 2.50 10⁻² m

f₂ = 18 GHz = 18 10⁹ Hz

λ₂ = 3 10⁸ /18 10⁹

λ₂ = 1.66 10⁻² m

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Tems11 [23]

I think it's potassium, but i'm not sure

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