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3 years ago

14

an airplane is carrying 3 passengers to san Francisco. the plane is 3000 m in the air. if the PE of the plane and passengers is

48,510,00J, what is the mass of the plane and passengers?round to the nearest tenth.

1 answer:

Stella [2.4K]3 years ago

7 0

15 I’m pretty sure yes it is

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A 15.0 L tank of gas is contained at a high pressure of

Inessa05 [86]

Answer:

20.5 torr

Explanation:

Given parameters:

Volume of tank = 15L

Pressure of tank = 8.2 x 10⁴torr

Volume of empty chamber = 6.0 x 10⁴L

Unknown:

New pressure of the gas in this chamber = ?

Solution:

To solve this problem, a good knowledge of the gas law will suffice here. Since pressure and volume relationships are under consideration, the Boyle's law is the proper gas law to apply.

Boyle's law states that "at constant temperature, the volume of fixed mass of gas is inversely proportional to the pressure of the gas".

Mathematically;

(Pressure x volume) of tank = (Pressure x volume ) of empty chamber

15 x 8.2 x 10⁴ = Pressure of empty chamber x 6 x 10⁴

Pressure of empty chamber = 20.5 torr

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3 years ago

A glucose solution is administered intravenously into the bloodstream at a constant rate r. As the glucose is added, it is conve

Helen [10]

Answer:

$C(t)=\frac{r}{k}-(\frac{r-kC_o}{k})e^{-kt}$

Explanation:

The differential equation is given as:

$\frac{dC}{dt} = r- kC$

$\frac{dC}{r- kC} = dt$

Taking integral of both sides; we have:

$\int\limits \frac{dC}{r- kC} = \int\limits dt$

$-\frac{1}{k} In(r-kC) = t+D\\In(r-kC)=-kt-kD$

$r-kC=e^{-kt-kD}$

$r-kC=e^{-kt}e^{-kD}$

$r-kC=Ae^{-kt}$

$kC=r-Ae^{-kt}$

$C=\frac{r}{k}-\frac{A}{k}e^{-kt}$

$C(t)=\frac{r}{k}-\frac{A}{k}e^{-kt}$ ------- equation (1)

If C(0)= $C_o$ ; we have:

C(0)= $\frac{r}{k}-\frac{A}{k}e^0$ (where; A is an integration constant)

$C_o = \frac{r}{k}- \frac{A}{k}$

$C_o=\frac{r-A}{k}$

$kC_o=r-A$

$A=r-kC_o$

Substituting $A=r-kC_o$ into equation (1); we have;

$C(t)=\frac{r}{k}-(\frac{r-kC_o}{k})e^{-kt}$

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3 years ago

Write 2 different scenarios of how livestock animals provide a service. (Example – Zoe the

Anon25 [30]

Answer:

Interacting with animals has been shown to decrease levels of cortisol (a stress-related hormone) and lower blood pressure. Other studies have found that animals can reduce loneliness, increase feelings of social support, and boost your mood.

Explanation:

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3 years ago

Please help will mark brainliest.<br><br> there are four questions and a formula

fomenos

Explanation:

1=2 atoms

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4 years ago

Which of the following represents the ground state electron configuration for the Mn3 ion?

Allisa [31]

Answer:

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Explanation:

The $Mn^{+3}$ has 22 electrons arround the nucleous. Its ground state configuration following the diagonal rule is:

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In term of the previous noble gas:

$[Ar] 4s^2 3d^2$

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3 years ago