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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If a woman runs 100 meters north and then 70 meters south, what is her total displacement?

Burka [1]

Displacement is the distance between the starting and ending points, in the direction from the starting point to the ending point, all regardless of the route followed from the starting point to the end point.

The woman's displacement is therefore 30 meters north.

8 0

3 years ago

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Russian ice skater, Alina Zagitova, spins her way to projected Gold in the 2018 Olympics. During one particular spin, she moves

solniwko [45]

By conservation of angular momentum

I1*ω1 = I2*ω2 -----> I1*ω1/I2 = 129*95/32 = 383 RPM <<<<<

383 rev/min * 2πrad/rev * 1min/60s = 383*2π/60 = 40.1 radians/s <<<

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3 years ago

The temperature and pressure at the surface of Mars during a Martian spring day were determined to be -50 °C and 900 Pa, respect

Sidana [21]

Answer:

T = 273 + (-50) = 273 – 50 = 223 K

R = 188.82 J / kg K for CO2

Density (Martian Atmosphere) = P / RT = 900 / 188.92 x 223 = 900 / 42129.16 = 0.0213 kg / $m^{3}$

T = 273 +18 = 291 K, R = 287 J / kg k (for air) P = 101.6 k Pa = 101600 Pa

Density (Earth Atmosphere) = P / RT = 101600 / 287 x 291 = 1.216 kg / $m^{3}$

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4 years ago

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What is the name for the layer of cells at the back of the eye that contains photoreceptors

valkas [14]

I believe this one is the retina...

8 0

3 years ago

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You are riding in an elevator that is accelerating upward. Suppose you stand on a scale. The reading on the scale is __________.

olchik [2.2K]

Answer:

greater than your true weight

Explanation:

When going up in an elevator the acceleration of the elevator is added to the acceleration due to gravity. This will increase the reading on the scale.

The expression of the resultant weight will be

$N=m(a+g)$

where,

m = Mass of the person

g = Acceleration due to gravity = 9.81 m/s²

a = Acceleration of the elevator.

Hence, the reading on the scale is <u>greater than your true weight.</u>

5 0

3 years ago