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2 years ago

Which growth model is a realistic representation of population growth?

2 answers:

6 0

The logistic model<span> takes the shape of a sigmoid curve and describes the </span>growth<span> of a</span>population<span> as exponential, followed by a decrease in </span>growth<span>, and bound by a carrying capacity due to environmental pressure</span>

agasfer [191]2 years ago

5 0

<h2>Answer:</h2>

<u>The logistics growth model </u><u>is a realistic representation of population growth</u>

<h2>Explanation:</h2>

Environmental scientists use two models to describe populations growth over the passage of time.

The exponential growth model
The logistic growth model

Logistic population growth occurs when the growth rate decreases as the population reaches carrying capacity. We already know that carrying capacity is the maximum number of individuals in a population that the environment can support. So whenever the population approaches carrying capacity, its growth rate will start to slow. Logistic growth model is represented by mathematical equations therefore it is more realistic model.

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2 years ago

If an atom had 35 protons in the nucleus how many electrons will it have orbiting the nucleus ?

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3 years ago

Read 2 more answers

0.235 moles of a diatomic gas expands doing 205 J of work while the temperature drops 88 K. Find Q.? (Unit=J)

Harman [31]

The heat released by the gas is -225 J

Explanation:

First of all, we have to calculate the change in internal energy of the gas, which for a diatomic gas is given by

$\Delta U = \frac{5}{2}nR\Delta T$

where

n = 0.235 mol is the number of moles

$R=8.314\cdot J/mol K$ is the gas constant

$\Delta T = -88 K$ is the change in temperature

Substituting,

$\Delta U = \frac{5}{2}(0.235)(8.314)(-88)=-430 J$

Now we can us the 1st law of thermodynamics to find the heat absorbed/released by the gas:

$\Delta U = Q -W$

where

$\Delta U = -430 J$ is the change in internal energy

Q is the heat

W = 205 J is the heat done by the gas

Solving for Q,

$Q=\Delta U + W = -430 + 205 =-225 J$

Since the sign is negative, it means the heat has been released by the gas.

Learn more about thermodynamics:

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2 years ago

Brlan is repairing an old alarm clock. He needs to replace a device that converts the electric energy into sound energy. Which o

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2 years ago

A 1-kg rock is suspended from the tip of a horizontal meterstick at the 0-cm mark so that the meterstick barely balances like a

tigry1 [53]

Explanation:

Given that,

Mass if the rock, m = 1 kg

It is suspended from the tip of a horizontal meter stick at the 0-cm mark so that the meter stick barely balances like a seesaw when its fulcrum is at the 12.5-cm mark.

We need to find the mass of the meter stick. The force acting by the stone is

F = 1 × 9.8 = 9.8 N

Let W be the weight of the meter stick. If the net torque is zero on the stick then the stick does not move and it remains in equilibrium condition. So, taking torque about the pivot.

$9.8\times 12.5=W\times (50-12.5)\\\\W=\dfrac{9.8\times 12.5}{37.5}$

W = 3.266 N

The mass of the meters stick is :

$m=\dfrac{W}{g}\\\\m=\dfrac{3.266}{9.81}\\\\m=0.333\ kg$

So, the mass of the meter stick is 0.333 kg.

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2 years ago