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3 years ago

I WILL GIVE BRAINLIEST!!!!!Which site is moving the fastest? Which is moving Slowest?

Physics

1 answer:

Katena32 [7]3 years ago

3 0

Answer:

Fastest: Norco

Slowest: Mt luna

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Calculate the pressure exerted by 11.1 moles of neon gas in a volume of 5.45 L at 25°C using (a) the ideal gas equation and (b)

Ilia_Sergeevich [38]

Answer:

49.82414 atm

50.74675 atm

Explanation:

P = Pressure

V = Volume = 5.45 L

R = Gas constant = 0.08205 L atm/mol K

T = Temperature = 25°C

a = 0.211 atm L²/mol²

b = 0.0171 atm L²/mol²

From ideal gas law we have

$PV=nRT\\\Rightarrow P=\dfrac{nRT}{V}\\\Rightarrow P=\dfrac{11.1\times 0.08205(273.15+25)}{5.45}\\\Rightarrow P=49.82414\ atm$

The pressure is 49.82414 atm

From Van der Waals equation we have

$\left(P+\frac{an^2}{V^2}\right)\left(v-nb\right)=nRT\\\Rightarrow P=\dfrac{nRT}{V-nb}-\dfrac{an^2}{V^2}\\\Rightarrow P=\dfrac{11.1\times 0.08205\times (273.15+25)}{5.45-(11.1\times 0.0171)}-\dfrac{0.211\times 11.1^2}{5.45^2}\\\Rightarrow P=50.74675\ atm$

The pressure is 50.74675 atm

3 0

3 years ago

Two conductors made of the same material are connected across the same potential difference. Conductor A has seven times the dia

Leona [35]

Complete question:

Two conductors made of the same material are connected across the same potential difference. Conductor A has seven times the diameter and seven times the length of conductor B. What is the ratio of the power delivered to A to power delivered to B.

Answer:

The ratio of the power delivered to A to power delivered to B is 7 : 1

Explanation:

Cross sectional area of a wire is calculated as;

$A = \frac{\pi d^2}{4}$

Resistance of a wire is calculated as;

$R = \frac{\rho L}{A} \\\\R = \frac{4\rho L}{\pi d^2} \\\\$

Resistance in wire A;

$R = \frac{4\rho _AL_A}{\pi d_A^2}$

Resistance in wire B;

$R = \frac{4\rho _BL_B}{\pi d_B^2}$

Power delivered in wire;

$P = \frac{V^2}{R}$

Power delivered in wire A;

$P = \frac{V^2_A}{R_A}$

Power delivered in wire B;

$P = \frac{V^2_B}{R_B}$

Substitute in the value of R in Power delivered in wire A;

$P_A = \frac{V^2_A}{R_A} = \frac{V^2_A \pi d^2_A}{4 \rho_A L_A}$

Substitute in the value of R in Power delivered in wire B;

$P_B = \frac{V^2_B}{R_B} = \frac{V^2_B \pi d^2_B}{4 \rho_B L_B}$

Take the ratio of power delivered to A to power delivered to B;

$\frac{P_A}{P_B} = (\frac{V^2_A \pi d^2_A}{4\rho_AL_A} ) *(\frac{4\rho_BL_B}{V^2_B \pi d^2_B})\\\\ \frac{P_A}{P_B} = (\frac{V^2_A d^2_A}{\rho_AL_A} )*(\frac{\rho_BL_B}{V^2_B d^2_B})\\\\$

The wires are made of the same material, $\rho _A = \rho_B$

$\frac{P_A}{P_B} = (\frac{V^2_A d^2_A}{L_A} )*(\frac{L_B}{V^2_B d^2_B})\\\\$

The wires are connected across the same potential; $V_A = V_B$

$\frac{P_A}{P_B} = (\frac{ d^2_A}{L_A} )* (\frac{L_B}{d^2_B} )$

wire A has seven times the diameter and seven times the length of wire B;

$\frac{P_A}{P_B} = (\frac{ (7d_B)^2}{7L_B} )* (\frac{L_B}{d^2_B} )\\\\\frac{P_A}{P_B} = \frac{49d_B^2}{7L_B} *\frac{L_B}{d^2_B} \\\\\frac{P_A}{P_B} =\frac{49}{7} \\\\\frac{P_A}{P_B} = 7\\\\P_A : P_B = 7:1$

Therefore, the ratio of the power delivered to A to power delivered to B is

7 : 1

5 0

3 years ago

In Ohm's Law, it states that the current in the circuit is directionally proportional to the voltage in that circuit. Explain wh

tester [92]

Answer:

Explanation:

Well mathematically it would look like this

E = k * I

k is the constant of proportionality.

As the voltage goes up, so does the current.

As the voltage goes down, so does the current.

In physics and engineering,, the formula is written somewhat differently.

E = I * R

The R is a device which limits the current. If R = 0 (like it is just a switch closing) then the first thing you will notice is that the lights go out and you better know where the circuit breakers are and have a flashlight to see which one you shorted out.

So R has a value > 0 in practice.

5 0

3 years ago

Is what flows and carries energy in a circuit

xenn [34]

The correct answer to this Electric current.

7 0

3 years ago

In order to increase the rate of acceleration of a car, you should apply more

Law Incorporation [45]

Answer:

True

Explanation:

Because with more force the car will move faster than it did before!!!

7 0

4 years ago