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3 years ago

What is Pascal principle

1 answer:

3 0

O Princípio de Pascal é o princípio físico elaborado pelo físico e matemático francês Blaise Pascal (1623-1662), que estabelece que a alteração de pressão produzida em um fluido em equilíbrio transmite-se integralmente a todos os pontos do fluido e às paredes do seu recipiente.

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Which example involves the transformation of chemical energy directly into light energy?

zimovet [89]

burning sodium or magnesium

8 0

3 years ago

Two charges, X and Y, are placed along the x-axis. Charge X is +18 nC and is placed at x = 0. Charge Y is placed at a location o

Helen [10]

Answer:

Charge Z can be placed at x = -2.7 m or at x = 0.27 m.

Explanation:

The Coulomb force between two charges, $Q_1$ and $Q_2$ , separated by a distance, $d$ , is given

$F = k\dfrac{Q_1Q_2}{r^2}$

k is a constant.

For the charge Z to be at equilibrium, the force exerted on it by charge X must be equal and opposite to the force exerted on it by charge Y.

It is to be placed along the x-axis. Hence, it is on the same line as charges X and Y.

Let the charge on Z be Q. It is positive.

Let the distance from charge X be x m. Then the distance from charge Y will be (0.60 - x) m.

Force due to charge X

$F_X = k\dfrac{18Q}{x^2}$

Force due to charge Y

$F_Y = k\dfrac{-27Q}{(0.60-x)^2}$

Since both forces are equal and opposite,

$F_X = -F_Y$

$k\dfrac{18Q}{x^2} = -k\dfrac{-27Q}{(0.60-x)^2}$

$\dfrac{2}{x^2} = \dfrac{3}{(0.60-x)^2}$

$2(0.60-x)^2 = 3x^2$

$2(0.36-1.20x+x^2) = 3x^2$

$0.72-2.40x+2x^2 = 3x^2$

$x^2+2.40x-0.72 = 0$

Applying the quadratic formula,

$x = \dfrac{-2.40\pm\sqrt{2.40^2 - (4)(1)(-0.72)}}{2} = \dfrac{-2.40\pm\sqrt{8.64}}{2}$

$x = -2.7$ or $x = 0.27$

Charge Z can be placed at x = -2.7 m or at x = 0.27 m

3 0

3 years ago

A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill

Flauer [41]

Magnitude of acceleration = (change of speed) / (time for the change) =

(12 m/s - 0) / (3 sec) =

12/3 = 4 m/s²

What's a challenge question ? Have we all passed the event horizon
and been spaghettified without knowing it ?

8 0

3 years ago

PLEASE HELP THIS IS TIMED

Harlamova29_29 [7]

Answer:

85 N backwards

Explanation:

u subtract then thats the net force and add direction

8 0

3 years ago

Read 2 more answers

List SI units of measurement for length, mass, time and temperature? help please!? i havent gotten my books and i lost my notes

nika2105 [10]

The SI unit for length is meters(m), for mass is kilograms(kg), for volume is cubicmeter(m^3), for density kilogram per cubic meter(kg/m^3), for time is seconds(s), and for temperature is kelvins(K).

5 0

3 years ago