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2 years ago

Choose all the answers that apply. Ecosystems _____.

Physics

2 answers:

lana [24]2 years ago

3 0

The answers are; B, C & E.

An ecosystem defines all the organism and their interaction with their environment (inducing abiotic factors such as energy from the sun and water). Biomes (which can be defined as a part of the environment that more or less share the same environmental conditions) make up an ecosystem.

Assoli18 [71]2 years ago

3 0

Answer:

Everything except maybe c.

Explanation: What does your backyard have in common with the Pacific Ocean? It's hard to imagine that they could possibly have anything in common, right? Well, they are both ecosystems. They both have living organisms and non-living factors such as animals and oxygen. An ecosystem is a group of living organisms and the environment that surrounds them. They can be as small as a puddle or as large as the entire earth. Ecosystems can be natural, like your backyard, or artificial, such as an aquarium. In this lesson. you will learn about matter and energy in an ecosystem.

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What voltage is required to move 6A through 20?<br><br>

Marina CMI [18]

Answer:

120V

Explanation:

Given parameters:

Current = 6A

Resistance = 20Ω

Unknown:

Voltage = ?

Solution:

According to ohms law;

V = IR

Where V is the voltage

I is the current

R is the resistance

Now, insert the parameters and solve;

V = 6 x 20 = 120V

7 0

2 years ago

Noise-canceling headphones are an application of destructive interference. Each side of the headphones uses a microphone to pick

jeka57 [31]

Answer:

2.5 ms

Explanation:

v = Speed of sound in air = 343 m/s

f = Frequency = 200 Hz

Wavelength is given by

$\lambda=\dfrac{v}{f}\\\Rightarrow \lambda=\dfrac{343}{200}\\\Rightarrow \lambda=1.715\ m$

In the case of destructive interference, path difference is given by

$x=\dfrac{\lambda}{2}\\\Rightarrow x=\dfrac{1.715}{2}\\\Rightarrow x=0.8575\ m$

Delay is givenn by

$t=\dfrac{x}{v}\\\Rightarrow t=\dfrac{0.8575}{343}\\\Rightarrow t=0.0025\ s$

The minimum headphone delay, that will cancel this noise is 2.5 ms

6 0

2 years ago

Which statement correctly compares and contrasts the information represented by the chemical formula and model of a compound?

Alina [70]

Models show how the atoms in a compound are connected.

6 0

2 years ago

Read 2 more answers

Point m is located a distance 2d from the midpoint between the two wires. find the magnitude of the magnetic field b1m created a

Tema [17]

Note: The diagram referred to in the question is attached here as a file.

Answer:

The magnitude of the magnetic field is $B = \frac{0.071 \mu I}{d}$

Explanation:

The magnetic field can be determined by the relationship:

$B = \frac{\mu I}{2\pi R}$ ...............(1)

Were I is the current flowing through the wires

The distance R from point 1 to m is calculated using the pythagora's theorem

$R = \sqrt{d^{2} + (2d)^{2} }$

$R = \sqrt{5d^{2} } \\R = d\sqrt{5}$

Substituting R into equation (1)

$B = \frac{\mu I}{2\pi d\sqrt{5} }$

$B = \frac{0.071 \mu I}{d}$

3 0

2 years ago

In this problem, you will analyze a system composed of two blocks, 1 and 2, of respective masses m1 and m2. To simplify the anal

Dafna1 [17]

Answer:

a) p = m1 v1 + m2 v2 , b) dp / dt = m1 a1 + m2 a2 , c) It is equivalent to force

dp / dt = 0

Explanation:

In this problem we have two blocks and the system is formed by the two bodies.

Part A. Initially they ask us to find the moment of the whole system

p = m1 v1 + m2 v2

Part B.

Find the derivative

dp / dt = m1 dv1dt + m2 dv2 / dt

dp / dt = m1 a1 + m2 a2

Part C.

Let's analyze the dimensions

m a = [kg] [m / s2] = [N]

It is equivalent to force

Part d

Acceleration is due to a net force applied

Part e

The acceleration of block 1 is due to the force exerted by block 2 during the moment change

Part f

Force of block 1 on block 2

True f12 = m1a1 f21 = m2a2

Part g

By the law of action and reaction are equal magnitude F12 = f21

Part H

dp / dt = 0

Isolated system F12 = F21 and the masses are constant. The total moment is only redistributed

7 0

2 years ago