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3 years ago

13

The pressure of a gas contained in a cylinder with a movable piston is 490 Pa. The area of the piston is 0.8 m2. Calculate the m

ass that is exerted on the piston.

1 answer:

andriy [413]3 years ago

8 0

Hello! Please answer my question that I just posted I really need answers. I don’t know sorry hope u fine someone that does know

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A 5.1kg iron skillet is heated to 373K from an initial temperature of 295K. How much thermal energy was transferred?

posledela

Answer:

the thermal energy transferred is 183,226.68 J

Explanation:

Given;

mass of iron skillet, m = 5.1 kg

initial temperature, t₁ = 295 K

final temperature, t₂ = 373 K

The thermal energy transferred is calculated as;

Q = mcΔt

where;

Δt is change in temperature, = t₂ - t₁

c is specific heat capacity of iron = 460.6 J/kg.K

Q = 5.1 x 460.6 x (373 - 295)

Q = 183,226.68 J

Therefore, the thermal energy transferred is 183,226.68 J

6 0

3 years ago

A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead, the pipe's diameter is 50.9 c

seraphim [82]

Answer:

Flow rate 2.34 m3/s

Diameter 0.754 m

Explanation:

Assuming steady flow, the volume flow rate along the pipe will always be constant, and equals to the product of flow speed and cross-section area.

The area at the well head is

$A = \pi r_w^2 = \pi (0.509/2)^2 = 0.203 m^2$

So the volume flow rate along the pipe is

$\dot{V} = Av = 0.203 * 11.5 = 2.34 m^3/s$

We can use the similar logic to find the cross-section area at the refinery

$A_r = \dot{V}/v_r = 2.34 / 5.25 = 0.446 m^2$

The radius of the pipe at the refinery is:

$A_r = \pi r^2$

$r^2 =A_r/\pi = 0.446/\pi = 0.141$

$r = \sqrt{0.141} = 0.377m$

So the diameter is twice the radius = 0.38*2 = 0.754m

6 0

3 years ago

Identify the solute and solvent in a solution made of 15g of oxygen and 5g<br> of helium

Marrrta [24]

Taking into account the definition of solvent and solute, helium is the solute and oxygen is the solvent.

<h3>Definition of solute and solvent</h3>

The solution is a homogeneous mixture of two or more components that have the same chemical and physical properties in a single phase. A solution is made up of two main components: the solute and the solvent.

That is, the solute and the solvent are the components of a chemical solution, that is, of a homogeneous mixture that occurs when one or more substances are dissolved in another substance.

The solute is the substance that dissolves in a solution. In solution, the solute is usually found in a lower proportion than the solvent.

Solvent is the substance in which a solute dissolves, resulting in a chemical solution. Generally, the solvent is the component that is found in the highest proportion in the solution. It will always be the solvent who will determine the state of the matter that will have the solution.

<h3>Solute ans solvent in this case</h3>

In this case, you consider that the solute is the component in less quantity and the solvent is the major component.

You know that a solution made of 15 g of oxygen and 5 g of helium. Then, helium is the solute and oxygen is the solvent.

Learn more about solvent and solute:

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#SPJ1

8 0

2 years ago

Lots of points and brainiest for first correct answer

sineoko [7]

That's the answer: I've attached the pic

7 0

3 years ago

Light of wavelength 675 nm passes

Anna [14]

Answer:

44

Explanation:

5 0

4 years ago