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4 years ago

The development of the cell theory was mostly directly related to the

Physics

1 answer:

Mazyrski [523]4 years ago

8 0

Answer:

Development of the gene chromosome theory

Explanation:

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Which formula below correctly states Coulomb's Law?

katovenus [111]

<h2>QUESTION:- Which formula below correctly states Coulomb's Law?</h2>

<h2>OPTIONS:- </h2>

$A. \: \: \: \: F = kqq/r^ 2 \\B. \: \: \: \: F = kqq/r \\C. \: \: \: \: F = qq/kr^ 2 \\D. \: \: \: \: F = kr^2 /qq \\$

<h2>ANSWER:- </h2>

F is directly proportional to the product of the charges

$F∝qq$

F is inversely proportional to the square of the distance between them

$F∝ \frac{1}{ {r}^{2} }$

from above 2 equation:-

we get:-

$F∝ \frac{qq}{ {r}^{2} }$

To remove proportionality sign we use constant for this case we r using constant k

$F = \frac{Kqq}{ {r}^{2} }$

So your answer is :-

OPTION A.

$F = \frac{Kqq}{ {r}^{2} }$

3 0

3 years ago

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The fastest propeller-driven aircraft is the Russian TU-95/142, which canreach a maximum speed of 925 km/h. For this speed, calc

valentinak56 [21]

Answer:

The resultant displacement of plane = 1310.76 Km

Explanation:

Given that,

Speed of the plane = 925 Km/h

Therefore, in 1 hour plane travels 925 Km

From figure,

Displacement if it travels east for 1.5 h, AB = 1387.5 Km

Displacement if it travels north-west for 2 h, BC = 1850 Km

Angle formed between two displacement = 135°

The resultant displacement is given by the relation

AC² = AB² + BC² + 2 AB BC Cos θ

Substituting the values in the equations,

AC² = 1387.5² + 1850² + 2 x 1387.5 x 1850 x Cos 135°

= 1718095

AC = 1310.76

Therefore, the resultant displacement of plane is 1310.76 Km

7 0

3 years ago

Which of these can produce an electric current?Required to answer. Single choice.

vivado [14]

Answer:

last one which is; All the above.

4 0

3 years ago

For a wavelength of 420 nm, a diffraction grating produces a bright fringe at an angle of 24°. For an unknown wavelength, the sa

Inessa [10]

Answer:

649.8420 nm

Explanation:

We have given $\Theta _1=24^{\circ} \ and\ \Theta _2=39^{\circ}$

$\lambda _1=420\ nm$ we have to find unknown wavelength that is $\lambda _2$

The condition for constructive interference is $dsin\Theta =n\lambda$

Where d is distance between slits $\Theta$ is angle of emergence and n is order of maxima

Using constructive interference equation

$dsin\Theta _1=n\lambda _1$ ---------eqn 1

$dsin\Theta _2=n\lambda _2$ ---------eqn 2

On dividing eqn 1 by eqn 2

$\frac{\lambda _1}{\lambda _2}=\frac{sin\Theta _1}{sin\Theta _2}$

$\frac{420}{\lambda _2}=\frac{sin24^{\circ}}{sin39^{\circ}}$

$\lambda _2=649.8420\ nm$

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3 years ago

The neck is a

ad-work [718]

Answer:

a) first class lever

6 0

3 years ago

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