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3 years ago

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3. A sample of Gas is 25 € What will happen to its pressure when the temperature is increased to 50 €

1 answer:

Alex787 [66]3 years ago

3 0

25 euros?

How do you measure pressure in euros??

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All of the following statements about the pyramid of biomass are correct EXCEPT: a. Biomass is the total dry mass of the organis

Goshia [24]

Answer: The answer is option B

Explanation:

The base of the pyramid represents primary producers since they help to pass on energy to consumers as we go higher in the pyramid. They are not consumers because they supply energy and do not use up energy. They are called autotrophs.

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3 years ago

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A storage tank holds methane at 120 K, with a quality of 25 %, and it warms up by 5°C per hour due to a failure in the refrigera

lord [1]

One of the fundamental pillars to solve this problem is the use of thermodynamic tables to be able to find the values of the specific volume of saturated liquid and evaporation. We will be guided by the table B.7.1 'Saturated Methane' from which we will obtain the properties of this gas at the given temperature. Later considering the isobaric process we will calculate with that volume the properties in state two. Finally we will calculate the times through the differences of the temperatures and reasons of change of heat.

Table B.7.1: Saturated Methane

$T_1 = 120K$

$p_1 = 191.6kPa$

$v_f = 0.002439m^3/kg$

$v_{fg} = 0.30367 m^3/kg$

Calculate the specific volume of the methane at state 1

$v_1 = v_f+x_1v_{fg}$

$v_1 = 0.002439+ (0.25)(0.30367)$

$v_1 = 0.0783m^3/kg$

Assume the tank is rigid, specific volume remains constant

$v_2 = v_1$

$v_2 = 0.0783m^3/kg$

Now from the same table we can obtain the properties,

At $v_g = 0.0783m^3/kg$

$T_2 = 145K$

$p_2 = 823.7kPa$

We can calculate the time taken for the methane to become a single phase

$t = \frac{T_2-T_1}{\dot{T}}$

Here

$T_1 =$ Initial temperature of Methane

$\dot{T} =$ Warming rate

Replacing

$t = \frac{(145-273)-(120-273)}{5}$

$t = \frac{25}{5}$

$t = 5hr$

Therefore the time taken for the methane to become a single phase is 5hr

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3 years ago

Which wave has the greatest amplitude?

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4 years ago

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lyudmila [28]

Answer:

yes

Explanation:

because when you shot the ball your applying force to it

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4 years ago

A ballistic pendulum is a device used to measure the speed of a projectile, such as a bullet. The projectile, of mass m, is fire

aliina [53]

Answer:

v = ((m + M) / m)*√(2*g*h)

Explanation:

Given

m = mass of the projectile

M = mass of the ballistic pendulum

v = initial speed of the projectile

v' = speedof the system (pendulum + projectile) after the inelastic collision

h = maximum height reached for the system

Knowing that is an inelastic collision we have

m*v + M*(0) = (m+M)*v'

⇒ v' = m*v / (m+M)

After the collision, we apply the Principle of the Conservation of Energy

Ki + Ui = Kf + Uf

where

Ui = Kf = 0 J

then

Ki = Uf

0.5*(m+M)*v'² = (m+M)*g*h

⇒ 0.5*v'² = g*h

⇒ v'² = 2*g*h

⇒ (m*v / (m+M))² = 2*g*h

⇒ v = ((m+M) / m)*√(2*g*h)

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3 years ago