All categories

3 years ago

What is one Pascal pressure? What is its unit?

Physics

2 answers:

BabaBlast [244]3 years ago

3 0

Explanation:

the force acting perpendicularly on unit area of surface

unit=pascle .

klasskru [66]3 years ago

3 0

A pressure of one Newton per square meter .. The SI unit of 1 Pascal pressure is 1 Newton per square metre .

You might be interested in

Which shows one example of physical change and the one example of a chemical change?

atroni [7]

Answer:

D. Freezing water and burning coal

Explanation:

8 0

3 years ago

A manometer using oil (density 0.900 g/cm3) as a fluid is connected to an air tank. Suddenly the pressure in the tank increases

Mila [183]

Answer:

Rise in level of fluid is 0.11 m

Rise in level of fluid in case of mercury is 0.728 cm or 7.28 mm

Solution:

As per the question:

Density of oil, $\rho_{o} = 0.900\ g/cm^{3} = 900\ kg/m^{3}$

Change in Pressure in the tank, $\Delta P = 7.28\ mmHg$

Density of the mercury, $\rho_{m} = 13.6\ g/cm^{3} = 13600\ kg/m^{3}$

Now,

To calculate the rise in the level of fluid inside the manometer:

We know that:

1 mmHg = 133.332 Pa

Thus

$\Delta P = 7.28\ times 133.332 = 970.656\ Pa$

Also,

$\Delta P = \rho_{o} gh$

where

g = acceleration due to gravity

h = height of the fluid level

$970.656 = 900\times 9.8\times h$

h = 0.11 m

Now, if mercury is used:

$\Delta P = \rho_{m} gh$

$970.656 = 13600\times 9.8\times h$

h = 0.00728 m = 7.28 mm

3 0

4 years ago

At constant pressure, a sample of a gas occupies 420 ml at 220 K. what volume does the gas occupy at 250 K?

soldier1979 [14.2K]

Answer:

480 mL

Explanation:

Ideal gas law states:

PV = nRT

At constant pressure, nR/P is constant. Therefore:

V / T = V / T

420 mL / 220 K = V / 250 K

V ≈ 480 mL

5 0

3 years ago

You throw a rock straight up from the edge of a cliff. It leaves your hand at time t = 0 moving at 13.0 m/s. Air resistance can

Zarrin [17]

Answer:

0.36s, 2.3s

Explanation:

Let gravitational acceleration g = 9.81 m/s2. And let the throwing point as the ground 0 for the upward motion. The equation of motion for the rock leaving your hand can be written as the following:

$s = v_0t + gt^2/2$

where s = 4 m is the position at 4m above your hand. $v_0 = 13 m/s$ is the initial speed of the rock when it leaves your hand. g = -9.81m/s2 is the deceleration because it's in the downward direction. And t it the time(s) it take to get to 4m, which we are looking for

$4 = 13t - 9.81t^2/2$

$4.905 t^2 - 13t + 4 = 0$

$t= \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$t= \frac{13\pm \sqrt{(-13)^2 - 4*(4.905)*(4)}}{2*(4.905)}$

$t= \frac{13\pm9.51}{9.81}$

t = 2.3 or t = 0.36

7 0

4 years ago

Read 2 more answers

A radio-controlled car increases its kinetic energy from 4 j to 12 j over a distance of 2 m. what was the average net force on t

just olya [345]

The answer to this is easy once you look at the units for Joules. 1 Joule = 1 N.m (Newton.meter). The 'Newton' is the units of force that we are trying to find, and we know the meters is 2, from the question. So you have an 8Joule or 8N.m energy difference over 2 meters.

well if we know the meters, then the real question is written as:
8N.m = ?N x 2m
so just solve for N;
N = 8N.m / 2m = 4
So F = 4N

3 0

4 years ago

What is one Pascal pressure? What is its unit?​

What is one Pascal pressure? What is its unit?