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4 years ago

11

lonic bonds are strong enough to cause all ionic compounds to be ___________ at room temperature. Plz help i need this

1 answer:

Mice21 [21]4 years ago

3 0

Answer:

because ionic bonds are strong, a lot of energy is needed to break them. They are all solids at room temperature.

Explanation:

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Web Spiders and Oscillations All spiders have special organs that make them exquisitely sensitive to vibrations. Web spiders det

chubhunter [2.5K]

Complete Question

The complete quetion is shown on the first uploaded image

Answer:

Explanation:

From the question we are told that

The mass of the fly is $m_f = 11 mg = 11*10^{-3} g = 1.1*10^{-5} \ kg$

The extension of the web is $e= 4.00 \ mm = 0.004 \ m$

The spring constant is mathematically evaluated as

$k = \frac{mg}{e}$

substituting values

$k = \frac{1.1 *10^{-5} *9.8}{0.004}$

$k = 0.027 \ N/m$

The frequency of vibration is

$f = \frac{1}{2 \pi} \sqrt{\frac{k}{m} }$

substituting values

$f = \frac{1}{2 * 3.142 } \sqrt{\frac{0.027}{1.1*10^{-5}} }$

$f = 7.9 Hz$

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3 years ago

a girl standing on her heel exert more pressure on the ground than an elephant standing flat on its feet. Give reasons

Lapatulllka [165]

Answer:

The pressure exerted by a women wearing shoes with pointed heels is much greater than what an elephant with one foot can exert on ground. This because of lesser area of contact of pointed heels.

hope helpful ~

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2 years ago

Consider the three displacement vectors

matrenka [14]

Answer:

Explanation:

$\overrightarrow{A} = 3\widehat{i}+3\widehat{j}$

$\overrightarrow{B} = \widehat{i}-4\widehat{j}$

$\overrightarrow{C} = -2\widehat{i}+5\widehat{j}$

(a)

$\overrightarrow{D} =\overrightarrow{A}+\overrightarrow{B}+\overrightarrow{C}$

$\overrightarrow{D} =\left ( 3+1-2 \right )\widehat{i} +\left ( 3-4+5 \right )\widehat{j}$

$\overrightarrow{D} =\left 2\widehat{i} +4\widehat{j}$

Magnitude of $\overrightarrow{D}$ = $\sqrt{2^{2}+4^{2}}$

= 4.47 m

Let θ be the direction of vector D

$tan\theta =\frac{4}{2}$

θ = 63.44°

(b)

$\overrightarrow{E} = - \overrightarrow{A}-\overrightarrow{B}+\overrightarrow{C}$

$\overrightarrow{E} =\left ( - 3- 1 -2 \right )\widehat{i} +\left ( - 3 + 4+5 \right )\widehat{j}$

$\overrightarrow{E} =- \left 6\widehat{i} +6\widehat{j}$

Magnitude of $\overrightarrow{E}$ = $\sqrt{6^{2}+6^{2}}$

= 8.485 m

Let θ be the direction of vector D

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

θ = 135°

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4 years ago

Find the force in newtons that does 0.0284 kilojoules of work in moving a book a distance of 4.00 meters

gulaghasi [49]

Work = (force) x (distance

28.4 joules = (force) x (4 meters)

Divide each side by (4 meters) :

Force = (28.4 joules) / (4 meters)

Force = 7.1 Newtons

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4 years ago

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Studentka2010 [4]

I think it would be constellations

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4 years ago