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3 years ago

14

Why is density used to determine the identity of matter?

1 answer:

dedylja [7]3 years ago

4 0

a substance's density is the same at a certain pressure and temperature, and the density of one substance is usually different than another substance.

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What is the trend noticed with the inner planets

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The inner planets are closer to the Sun and are smaller and rockier. ... The outer planets are further away, larger and made up mostly of gas. The inner planets (in order of distance from the sun, closest to furthest) are Mercury, Venus, Earth and Mars.Apr 23, 2014

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3 years ago

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3 years ago

A magnetic B field of strength 0.9 T is perpendicular to a loop with an area of 3 m2. If the area of the loop is reduced to zero

Alexeev081 [22]

Answer:

The magnitude of induced emf is 5.4 V

Explanation:

Given:

Magnetic field $B = 0.9$ T

Area of loop $\Delta A = 3$ $m^{2}$

Time take to reduce loop to zero $\Delta t = 0.5$ sec

To find induced emf we use faraday's law,

Induced emf is given by,

$\epsilon = -\frac{\Delta \phi}{\Delta t}$

Here minus sign shows lenz law, for finding magnitude of emf we ignore it.

Where $\phi = B\Delta A$

Put the value of flux and find induced emf,

$\epsilon = \frac{B\Delta A}{\Delta t}$

$\epsilon = \frac{0.9 \times 3}{0.5}$

$\epsilon = 5.4$ V

Therefore, the magnitude of induced emf is 5.4 V

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3 years ago

Which is a benefit of using synthetic polymers, such as nylon?

alisha [4.7K]

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Synthetic polymers are lightweight

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Which statement describes how the atoms in a conducting wire are organized?(1 point)

yulyashka [42]

Answer:

Positively charged nuclei are packed in an organized pattern, and the negatively charged valence electrons flow freely.

Explanation:

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3 years ago