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3 years ago

The model represents a fluorine (F) atom. What is the mass of the atom?

Physics

1 answer:

castortr0y [4]3 years ago

8 0

Answer:

Explanation:

The mass of an atom is found in the nucleus: number of protons + number of neutrons; 9 + 10 = 19

The mass number of fluorine is 19

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Which statement is true of a wave that’s propagating along the pavement and girders of a suspension bridge?

Readme [11.4K]

Had to look for the options and here is my answer.
The statement that is considered correct regarding a wave that is propagating along the pavement and girders of a suspension bridge is this: "t<span>he wave is mechanical, with particles vibrating in a direction that is perpendicular to that of the wave, forming compressions and rarefactions." Hope this helps.</span>

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4 years ago

Just number five!!!!

Mice21 [21]

<span>The smallest nonzero current depends on the maximum time T you are willing to wait. The smallest current would be I = e/T. After time T, one electron is observed to pass through the given area.</span>

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3 years ago

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Consider the mechanism. Step 1: 2A↽−−⇀B+C equilibrium Step 2: B+D⟶E slow Overall: 2A+D⟶C+E Determine the rate law for the overal

Cerrena [4.2K]

Answer : The rate law for the overall reaction is, $R=\frac{K[A]^2[D]}{[C]}$

Explanation :

As we are given the mechanism for the reaction :

Step 1 : $2A\rightleftharpoons B+C$ (equilibrium)

Step 2 : $B+D\rightarrow E$ (slow)

Overall reaction : $2A+D\rightarrow C+E$

First we have to determine the equilibrium constant from step 1.

The expression for equilibrium constant will be,

$K'=\frac{[B][C]}{[A]^2}$

Form this, the value of [B] is,

$[B]=\frac{K'[A]^2}{[C]}$ ............(1)

Now we have to determine the rate law from the slow step 2.

The expression for law will be,

$Rate=K''[B][D]$ .............(2)

Now put equation 1 in 2, we get:

$Rate=K''\frac{K'[A]^2}{[C]}[D]$

$Rate=\frac{K[A]^2[D]}{[C]}$

Therefore, the rate law for the overall reaction is, $R=\frac{K[A]^2[D]}{[C]}$

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3 years ago

Read 2 more answers

A mass 25kg is attached to a spring which is held stretched a distance 120 cm by a force F=300N (Fig. 7-28), and then released.

azamat

Explanation:

Spring is stretched by force f to distance

"X"

now here by force balance we can say

f = kx

k = !

now here we will we say that energy stored in the spring will convert into kinetic energy

kx² = mv²

(x² = mv²

now solving above equation we will have

PART 2)

now for half of the extension again we can use energy conservation

ka²-k(x/2)² = 1 {mv²

¾fx=mv²

now the speed is given as

3 fr 4m V=

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3 years ago

Make a general statement about what happens to light as it enters a different medium.

Aleksandr-060686 [28]

Answer:

Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. The wavelength decreases as the light enters the medium and the light wave changes direction.

Explanation:

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3 years ago