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3 years ago

Which of the following is the best definition of an isotope?

Physics

2 answers:

ad-work [718]3 years ago

8 0

Answer:

A. elements of the same kind with different numbers of neutrons

Explanation:

As we know that an atom is represented by

$_z^AX$

here we know that

z = atomic number

A = atomic number + number of neutrons

now if the number of neutrons in an atom is different but having same number atomic number then the combination of such group of atoms is known as isotopes.

So here we have

$_z^{A_1}X, _z^{A_2}X$

so above is the example of isotopes

aleksley [76]3 years ago

7 0

The best and most correct answer among the choices provided by your question is the first choice or letter A.

Isotopes are elements of the same kind with different numbers of neutrons.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

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A shell is fired with a horizontal velocity in the positive x direction from the top of an 80 m high cliff. The shell strikes th

Sonbull [250]

Answer:

V = 331.59m/s

Explanation:

First we need to calculate the time taken for the shell fire to hit the ground using the equation of motion.

S = ut + 1/2at²

Given height of the cliff S = 80m

initial velocity u = 0m/s²

a = g = 9.81m/s²

Substitute

80 = 0+1/2(9.81)t²

80 = 4.905t²

t² = 80/4.905

t² = 16.31

t = √16.31

t = 4.04s

Next is to get the vertical velocity

Vy = u + gt

Vy = 0+(9.81)(4.04)

Vy = 39.6324

Also calculate the horizontal velocity

Vx = 1330/4.04

Vx = 329.21m/s

Find the magnitude of the velocity to calculate speed of the shell as it hits the ground.

V² = Vx²+Vy²

V² = 329.21²+39.63²

V² = 108,379.2241+1,570.5369

V² = 109,949.761

V = √ 109,949.761

V = 331.59m/s

Hence the speed of the shell as it hits the ground is 331.59m/s

7 0

3 years ago

4. A businesswoman on a trip flies a total of 23,000 km. The first day she traveled 4000 km, the second day 11,000 km, and on th

lutik1710 [3]

Answer:

14.035087719298246 ≈ 14 hours

Explanation:

just subtract the 4000 and the 11000 from 23000 which gives you 8000. And then divide that my 570

3 0

3 years ago

If a passenger train is traveling on a straight track with a negative velocity and a positive acceleration, is it speeding up or

lana66690 [7]

Answer:

Slowing down

Explanation:

Since a train with negative velocity and positive acceleration, this means its acceleration is in opposite direction with the velocity. As time progress, this opposite direction would decrease the velocity magnitude, making the train slowing down.

3 0

3 years ago

Un prisma rectangular de cobre, de base igual a 36 centímetros cuadrados y una altura de 10 cm se sumerge hasta la mitad por med

butalik [34]

La respuesta correcta es 180 centímetros cúbicos o 180 $cm^{3}$

Explicación:

El primer paso para saber cuanto alcohol desaloja el prisma es calcular el volumen total del prisma. El volumen se puede encontrar usando la formula V (Volumen) = B (base) x h (altura). El proceso se muestra a continuación:

V = B x h

V = 36 $cm^{2}$ x 10 cm

V= 360 $cm^{3}$

Finalmente, el volumen total del prisma debe dividirse en 2 considerando que solo la mitad del prisma fue sumergida y esta mitad equivale al volumen del alcohol desplazado.

360 $cm^{3}$ ÷ 2 = 180 $cm^{3}$

5 0

3 years ago

The coordinates 40 degrees north and 100 degrees east falls in what country?

garik1379 [7]

We can find for the country by using a map with angle coordinates. Based on the map that I found online, the country which is located at around 40 degrees north and 100 degrees east is no other than:

<span>China</span>

7 0

3 years ago

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