The atomic number, or ________ number, is the described as the number of ________

Which compound is an isomer of CH3CH2OH?

A)CH3OCH3 is the isomer of CH3CH2OH

8 0

3 years ago

In clinical brachytherapy, the supervision of radio elements and dose interpretation are performed by the therapeutic __________

Alex_Xolod [135]

Answer:

Radiation oncologist.

Explanation:

Cancer is one of the most deadly disease and half of the world population died due to cancer every year. Cancer might occur due to the mutation in the genes that control the cell cycle.

The oncologist may be defined as the individual that has specialized in the cancer and its treatment. The different radiation might use to kill the cancerous cell and the radio elements are administered in the drugs used during the chemotherapy.

Thus, the answer is radiation oncologist.

4 0

4 years ago

A car travels 2.5 hours in a Northern direction for 300km. Determine the cats speed and velocity

nika2105 [10]

Answer:

Velocity = 120 km/h in north

Speed = 120 km/h

Explanation:

Given data:

Distance = 300 km north

Time taken = 2.5 hr

Speed and velocity = ?

Solution:

Speed = distance / time

Speed = 300 km / 2.5 h

Speed = 120 km/h

Velocity = change in position / change in time

Velocity = 300 km north / 2.5 hr

Velocity = 120 km/h in north

3 0

3 years ago

An atom of helium has a radius of 31. pm and the average orbital speed of the electrons in it is about 4.4x 10 m/s Calculate the

otez555 [7]

The question is incomplete, here is the complete question:

An atom of helium has a radius of 31. pm and the average orbital speed of the electrons in it is about $4.4\times 10^6m/s$ . Calculate the least possible uncertainty in a measurement of the speed of an electron in an atom of helium. Write your answer as a percentage of the average speed, and round it to 2 significant digits

<u>Answer:</u> The percentage of average speed is 41 %

<u>Explanation:</u>

We are given:

Radius of helium atom = 31 pm = $31\times 10^{-12}m$ (Conversion factor: $1m=10^{12}pm$ )

So, diameter of helium atom = $(2\times r)=(2\times 31\times 10^{-12})=64\times 10^{-12}m$

The diameter of the atom will be equal to the uncertainty in position.

The equation representing Heisenberg's uncertainty principle follows:

$\Delta x.\Delta p=\frac{h}{2\pi}$

where,

$\Delta x$ = uncertainty in position = d = $64\times 10^{-12}m$

$\Delta p$ = uncertainty in momentum = $m\Delta v$

m = mass of electron = $9.1095\times 10^{-31}kg$

h = Planck's constant = $6.627\times 10^{-34}kgm^2/s^2$

Putting values in above equation, we get:

$64\times 10^{-12}m\times 9.1095\times 10^{-31}kg\times \Delta v=\frac{6.627\times 10^{-34}kgm^2/s}{2\times 3.14}\\\\\Delta v=\frac{6.627\times 10^{-34}kgm^2/s^2}{2\times 3.14\times 64\times 10^{-12}m\times 9.1095\times 10^{-31}kg}=1.81\times 10^6m/s$

To calculate the percentage of average speed, we use the equation:

$\text{Percentage of the average speed}=\frac{\text{Uncertainty in velocity}}{\text{Average orbital speed}}\times 100$

We are given:

Average orbital speed = $4.4\times 10^6m/s$

Putting values in above equation, we get:

$\text{Percentage of the average speed}=\frac{1.81\times 10^6m/s}{4.4\times 10^6m/s}\times 100\\\\\text{Percentage of the average speed}=41.\%$

Hence, the percentage of average speed is 41 %

3 0

4 years ago

2. (4 pts) There are N, molecules in the air. There is also liquid N2. Draw a molecular level

AlekseyPX

CHY3 I’m sure it’s that

3 0

3 years ago

The atomic number, or ________ number, is the described as the number of _________ in the nucleus of an chemical element.

The atomic number, or number, is the described as the number of _ in the nucleus of an chemical element.