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2 years ago

Describe your ecological footprint. What do the results mean? What are some things

Physics

1 answer:

bixtya [17]2 years ago

7 0

The ecological footprint finds the person demand on natural demand.

<h3>What is ecological footprint?</h3>

The ecological footprint is the method promoted by the Global Footprint Network to find human demand on natural capital. The quantity of nature it takes to support people or an economy. It tracks this demand through an ecological accounting system.

Some things which could do to reduce your footprint is Reduce Your Use of Single-Use, Disposable Plastics, Switch to Renewable Energy, Eat Less Meat, Reduce your Waste, Recycle Responsibly, Drive Less, Reduce Your Water Use, Support Local.

Thus, the ecological footprint is to find person demand on natural demand.

Learn more about ecological footprint.

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ТОРмозной путь тягача 20 м, чему равно ускорение, если время торможения составило 15 с, если начальная скорость была 15 м\с. (от

Travka [436]

Ответ:

Пояснение:

Используя уравнение движения S = ut + 1 / 2at², где;

U - начальная скорость = 15 м / с

а - ускорение

s - пройденное расстояние = 20м

t - время = 15 секунд

подставляем в формулу заданные параметры

20 = 15 (15) + 1 / 2a (15) ²

20 = 225 + 225a / 2

20 = 225 + 112,5a

20-225 = 112,5a

-205 = 112,5a

а = -205 / 112,5

а = -1,82

Отсюда ускорение -1,82

3 0

3 years ago

A 12 V battery applies a potential difference to three resistors in series. If the potential at point P is 0.0 V, the potential

galina1969 [7]

This question is incomplete, the complete question is on the image uploaded along this answer.

Answer:

the potential at point B is 5 V, Option d) is the correct answer

Explanation:

Given that;

from the image;

R = 3 + 4 + 5 = 12 Ω

so I = 12/12 = 1 A

Q = 0 + 12 = 12 V

now

VA - VQ = - I × 3 = -3 V

VA = VQ - 3 = 12 - 3 = 9 V

VB - VA = - I × 4Ω = - 4 V

⇒VB = VA - 4 = 9 V - 4 V = 5 V

Therefore the potential at point B is 5 V

Option d) is the correct answer

4 0

2 years ago

At a given moment, a plane passes directly above a radar station at an altitude of 6 km. Let θ be the angle that the line throug

Rom4ik [11]

- 187.237 km/hr fast is θ changing 12 min after the plane passes over the radar station

<u>Explanation:</u>

Let the distance x and angle θ be defined as in the figure below. Then

$\tan \theta=\frac{6}{x}$

Now, differentiate with respect to t, we get

$\sec ^{2} \theta \frac{d \theta}{d t}=-\left(\frac{6}{x^{2}}\right) \frac{d x}{d t}$

Now, calculate the travel distance from radar station to plane after 12min

Distance, $x=800 \times \frac{12}{60}=160$

Substituting ‘x’ value, we get

$\tan \theta=\frac{6}{160}=\frac{3}{80}$

Find the rate of change of theta after 12 min,

$\frac{d \theta}{d t}=-\frac{1}{\sec ^{2} \theta} \times \frac{6}{x^{2}} \times \frac{d x}{d t}$

We know, the formula for,

$\sec ^{2} \theta=1+\tan ^{2} \theta=1+\frac{3^{2}}{80^{2}}$

So, then, $\frac{d x}{d t}=800 \mathrm{km} / \mathrm{hr}(\text { let assume })$

$\frac{d \theta}{d t}=-\frac{1}{\left(1+\frac{3^{2}}{80^{2}}\right)} \times \frac{6}{160^{2}} \times 800$

$=-\frac{1}{\left(1+\frac{3^{2}}{80^{2}}\right)} \times \frac{6}{160^{2}} \times 800$

$=-\frac{1}{1.0014} \times \frac{6}{25600} \times 800$

$=-\frac{4800}{25635.84}=-0.187237 \mathrm{rad} / \mathrm{hr}$

When express the value in km/he, we get, the change in theta as

$=-187.237 \mathrm{km} / \mathrm{hr}$

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3 years ago

BIDEN WON MY RIGHTS ARENT GONNA BE TAKEN AWAY ‼️

ddd [48]

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3 years ago

Part a which of the following statements are true concerning electromagnetic induction?

maksim [4K]

I had to look for the options and here is my answer:

Based on the actual options attached to this question, the statements that are considered true about electromagnetic induction are the following:
-It is possible to induce a current in a closed loop of wire without the aid of a power supply or battery.
-It is possible to induce a current in a closed loop of wire by changing the strength of a magnetic field enclosed by the wire.
-It is possible to induce a current in a closed loop of wire by change the orientation of a magnetic field enclosed by the wire.
-It is possible to induce a current in a closed loop of wire located in a uniform magnetic field by either increasing or decreasing the <span>area enclosed by the loop.</span>

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3 years ago