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2 years ago

Eeeee help pls pls pls

Physics

1 answer:

Dima020 [189]2 years ago

5 0

Answer:

hey dream I m your big fan for u I have answered this question The third one is correct.

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When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C

Alex_Xolod [135]

Answer:

26.466cm³/min

Explanation:

Given:

Volume 'V'= 320cm³

P= 95kPa

dP/dt = -11 kPa/minute

pressure P and volume V are related by the equation

P $V^{1.4}$ =C

we need to find dV/dt, so we will differentiate the above equation

$V^{1.4} \frac{dP}{dt} + P\frac{d[V^{1.4} ]}{dt} = \frac{d[C]}{dt}$

$\frac{dP}{dt} V^{1.4} + P(1.4)V^{0.4} \frac{dV}{dt} =0$

lets solve for dV/dt, we will have

$\frac{dV}{dt} =\frac{-\frac{dP}{dt} V^{1.4} }{P(1.4)V^{0.4} } \\\frac{dV}{dt} =- \frac{-\frac{dP}{dt} V}{P(1.4)}$

$\frac{dV}{dt} = -\frac{(-11 ) 320}{95(1.4)}$ (plugged in all the values at the instant)

$\frac{dV}{dt}$ = 26.466

Therefore, the volume increasing at the rate of 26.466cm³/min at this instant

6 0

3 years ago

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How did people years ago find out which side of a magnet was north and which was south?

wlad13 [49]

In 1600 when William Gilbert published De Magnete

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2 years ago

A series LR circuit consists of a 2.0-H inductor with negligible internal resistance, a 100-ohm resistor, an open switch, and a

VMariaS [17]

Answer:

The maximum power delivered by the power supply is 0.81 W.

Explanation:

Given that,

Inductance L= 2.0 H

Resistance R = 100 ohm

Voltage = 9.0 V

We need to calculate the power

Using formula of power

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

Where, P = power

V = voltage

R = resistance

Put the value into the formula

$P = \dfrac{(9.0)^2}{100}$

$P =0.81\ W$

Hence, The maximum power delivered by the power supply is 0.81 W.

7 0

3 years ago

Jordan exercises one to two times a week. She usually works out alone. Between meals, she sometimes snacks on potato chips from

tamaranim1 [39]

C I think I (hope this Helps)

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3 years ago

A 4.33 kg ball is dropped from the roof of a building 157.2 m high. While the ball is falling to Earth, a horizontal wind exerts

laiz [17]

Answer:

The ball takes 5.66 seconds to hit the ground.

Explanation:

In this problem, the horizontal wind that interferes with the ball doesn't affect the time in which the balls hit the ground.

To find this time this is the equation for kinetic energy:

$d=\frac{1}{2}gt^2$

Where d is the distance, g is the acceleration of gravity and t is the time that you have to find, you can solve this equation to find t:

$t=\sqrt{\frac{2d}{g}}$

Replace the values:

$t=\sqrt{\frac{2(157.2m)}{9.81/s}}$

t=5.66 s

3 0

3 years ago