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3 years ago

What are involuntary muscles

1 answer:

3 0

Involuntary Muscles

⇒ Involuntary Muscles are muscles that contract without any conscious control.

The most important Involuntary Muscle in the body is the heart.

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How would you calculate the difference in enthalpy?

Bad White [126]

(Biology)
Equation: (delta)G = (delta)H - T (delta)S
(delta)G stand for change in free energy. When it is positive, it is endergonic. When it is negative, it is exergonic.
H stands for bond energy and is enthalpy
T is the absolute temperature expressed in the Kelvin scale
S is entropy or disorder in the system

7 0

3 years ago

One side of a plane wall is held at 200°C while the other side is exposed to a convective environment having T10°C and h 100 W/m

adelina 88 [10]

Answer:

$\frac{\dot Q}{A} = 151.33 W/m^2$

$T_c = 25.153°C$

Explanation:

Given data:

one side wall temperature 200°C

other side wall temperature 10°C

h = 100 W/m^2 °C

k = 2.6W/m °C

wall thickness L = 30 cm

we know that heat flux is given as

$\frac{\dot Q}{A} = \frac{ T_A - T\infty}{\frac{L}{K} + \frac{1}{h}}$

$\frac{\dot Q}{A} = \frac{ 20- 10} {\frac{0.30}{2.6} + \frac{1}{100}}$

$\frac{\dot Q}{A} = 151.33 W/m^2$

$1515.33 W/m^2 = \frac{ T_A - T_c}{\frac{L}{K}}$

solving for temperature for cold surface is given as

$T_c = -1515.33 \times \frac{0.3}{2.6} + 200$

$T_c = 25.153°C$

8 0

3 years ago

A 2.00 liter evacuated container has a mass of 1050.0 g. When the container is filled with an unknown gas at 800. mm Hg pressure

Andrei [34K]

Answer:

(A) 28

Explanation:

To solve this problem we use the PV=nRT equation, where:

P = 800 mmHg ⇒ 800/760 = 1.05 atm

V = 2.00 L

n = ?

R = 0.082 atm·L·mol⁻¹·K⁻¹

T = 25.0 °C ⇒ 25.0 + 273.16 = 298.16 K

We input the data:

1.05 atm * 2.00 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 298.16 K

And solve for n:

n = 0.086 mol

Now we calculate the gas' mass:

Gas Mass = (Mass of Container w/ Gas) - (Mass of Empty Container)

Gas Mass = 1052.4 g - 1050.0 g = 2.4 g

Finally we calculate the unknown gas' molar mass, using its mass and its number of moles:

Molar Mass = mass / moles

Molar Mass = 2.4 g / 0.086 mol = 27.9 g/mol

So the answer is option (A).

5 0

3 years ago

which type of weather technology often carries cameras that can make images of Earth's surface clouds and snow cover?

elixir [45]

...a satellite!!!! that is one and maybe only answer

5 0

3 years ago

Given a solution with a hydroxide ion concentration, oh=3.73×10^-5,what is the ph

Stells [14]

Answer:

pH = 9.73

Explanation:

pOH is the negative logarithm of the molar concentration of hydroxide ions and pH is the negative logarithm of the concentration of hydronium ions.

The mathematical expression to determine pOH is:

$pOH=-\log [OH^-]$