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Pie
3 years ago
9

When area increases, pressure decreases. Find two situations where this principle is applied.

Physics
1 answer:
BigorU [14]3 years ago
5 0

Answer:

Explanation:

Pressure can be defined as the force per unit area hence there is an inverse relationship between pressure exerted by a substance and the area of that substance. For instance,

(1) if a bag of sand if filled with sand and an individual steps on this bag. The feet of he individual will form no shape/displace little sand sideways in the bag. But if the same quantity of sand is poured in a bigger bag (larger area) and the same individual stands on the bag, the feet of the individual will "sink" (decreased pressure from the bag) displacing some sand sideways.

(2) The straps of a bag are made wide (and not slim) so that the bag can exert lesser pressure on the shoulders when the same quantity of load is carried by the bag than if the straps were made narrow/slim.

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Why are units of measurement useful?
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4 years ago
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True or false conceptual physics 2 questions from chapter 25.
Arlecino [84]

Answer:

Explanation:

1) TRUE; potential difference can be calculated using path integral. Since the electric field is a conservative, the potential difference can be calculated using any path.

2) TRUE; since potential due to a charge is inversely dependent on distance, at infinity the potential will be almost zero.

3) TRUE, W = q.VBA.

4) FALSE; eV is a unit for work (or) energy.

5) TRUE; since the electric force is conservative force. There will be no loss in energy, the decreased potential energy will be coverted to kinetic energy.

6) FALSE; in the direction of electric field the potential decreases.

7) FALSE; equipotential surface is perpendicular to the electric field lines.

8) FALSE; electrostatic potential is scalar quantity. It depends only on the charge and distance from it.

9) FALSE; Inside a conductor the electric field is zero but the electric potential is constant at the value that is at the surface of the conductor.

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3 years ago
What is the momentum of an object with 9.74 kg and 15 m/s?​
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3 years ago
The gravitational force exerted by a proton on an electron is 2x1039 times weaker than the electric force that the proton exerts
pickupchik [31]

To solve this problem we will rely on the theorems announced by Newton and Coulomb about the Gravitational Force and the Electrostatic Force respectively.

In the case of the Force of gravity we have to,

F_g = G\frac{m_pm_e}{d^2}

Here,

G = Gravitational Universal Constant

m_p = Mass of Proton

m_e = Mass of Electron

d  = Distance between them.

F_g = (6.673*10^{-11} kg^{-1} \cdot m^3 \cdot s^{-2}) (\frac{(1.672*10^{-27}kg)(9.109*10^{-31})}{(52.9pm)^2})

F_g = 3.631*10^{-47}N

In the case of the Electric Force we have,

F_e = k\frac{q_pq_e}{d^2}

k = Coulomb's constant

q_p = Charge of proton

q_e = Charge of electron

d = Distance between them

F_e = (9*10^9N\cdot m^2 \cdot C^{-2})(\frac{(1.602*10^{-19}C)(1.602*10^{-19}C)}{(52.9pm)^2})

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Therefore

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We can here prove that the statement is True

7 0
3 years ago
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