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3 years ago

Match the organisms to the descriptions.

Physics

2 answers:

makvit [3.9K]3 years ago

6 0

Answer:

Lacks colored blood - Scorpion

Soft, unsegmented body - Octopus

A vertebrate - Bird

Lacks antennae - Starfish

Explanation:

Scorpion belongs to the Phylum Arthropoda of the Kingdom Animalia. All the organisms of this phylum lack coloured blood.

Octopus comes under the Phylum Molusca of the Kingdom Animalia. Soft, unsegmented body is the property of the organisms of this phylum.

Bird belongs to the Vertebrata class of the Phylum Chordata of Kingdom Animalia.

Starfish belongs to Echinodermata Phylum of the Kingdom Animalia. The organisms of this category do not posses antennae.

shtirl [24]3 years ago

5 0

Lacks colored blood - Scorpion

Soft, unsegmented body - Octopus

A vertebrate - Bird

Lacks antennae - Starfish

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yuradex [85]

(a) 0.0068 Wb

Since the plane of the coil is perpendicular to the magnetic field, the magnetic flux through the coil is given by

$\Phi = NBA$

where

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$A=8.5 cm^2 = 8.5\cdot 10^{-4} m^2$ is the area of the coil

At the beginning, we have

$B_i = 0.060 T$

so the initial magnetic flux is

$B_i = (200)(0.060 T)(8.5\cdot 10^{-4} m^2)=0.0102 Wb$

at the end, we have

$B_f=0.020 T$

so the final magnetic flux is

$B_f = (200)(0.020 T)(8.5\cdot 10^{-4} m^2)=0.0034 Wb$

So the magnitude of the change in the external magnetic flux through the coil is

$\Delta \Phi = |\Phi_f - \Phi_i|=|0.0034 Wb-0.0102 Wb|=0.0068 Wb$

(b) 0.567 V

The magnitude of the average voltage (emf) induced in the coil is given by Faraday-Newmann law

$\epsilon= \frac{\Delta \Phi}{\Delta t}$

where

$\Delta \Phi = 0.0068 Wb$ is the variation of magnetic flux

$\Delta t = 12 ms = 0.012 s$ is the time interval

Substituting into the formula, we find

$\epsilon=\frac{0.0068 Wb}{0.012 s}=0.567 V$

(c) 0.142 A

The average current in the coil can be found by using Ohm's law:

$I=\frac{V}{R}$

where

I is the current

V is the voltage

R is the resistance

Here we have:

V = 0.567 V (induced voltage)

$R=4.0 \Omega$ (resistance of the coil)

Solving for I, we find

$I=\frac{0.567 V}{4.0 \Omega}=0.142 A$

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3 years ago

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4 years ago

A person with a remote mountain cabin plans to install her own hydroelectric plant. A nearby stream is 3.00 m wide and 0.500 m d

Lubov Fominskaja [6]

Answer:

The power she can generate is 185.22 KW.

Explanation:

3.00m wide and 0.500m deep.

Cross sectional area = 1.500m^2

Velocity = 1.35m/s

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Mass flow rate = 18,000kg/s

Height = 4.20m

25.0% efficiency

<h3><u> FORMULA:</u></h3>

P = dE / dt * eff

<h3><u>SOLUTION:</u></h3>

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