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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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Which agent of weathering breaks down limestone statues?

Fynjy0 [20]

Acid chemicals because acid chemicals break down limestone statues

7 0

4 years ago

Read 2 more answers

A projectile is fired at an angle such that the vertical component of its velocity

mestny [16]

Answer:

<em>It takes 3 seconds to reach its high point</em>

Explanation:

<u>Projectile Motion</u>

In a projectile motion (or 2D motion), the object is launched with an initial angle θ and an initial velocity vo.

The components of the velocity are

$v_{ox}=v_o\cos\theta$

$v_{oy}=v_o\sin\theta$

The speed in the horizontal direction at any time t is:

$v_y=v_o\sin\theta-g.t$

The time taken to reach the maximum height is when vy=0, or:

$\displaystyle t_m=\frac{v_o\sin\theta}{g}$

We are given the y-component of the velocity, thus:

$\displaystyle t_m=\frac{30~m/s}{10~m/s^2}$

$t_m=3~s$

It takes 3 seconds to reach its high point

3 0

3 years ago

Calculate the pressure on a man’s foot when a woman of mass 65 kg steps on his foot with her heel which has an area of 0.12m2 wi

tino4ka555 [31]

Answer:

Pressure = force/area

= 650N/0.12m^2

= 5416.7 to 1 d.p

I got 650N by taking the gravitational field on earth to be 10N/kg.

Weight = mass x gravitational field

= 65 x 10N/kg

= 650

Answer is 5416.7 pascals (Pa)

5308.3 Pa

if gravitational field was taken to be 9.8N/kg

Hope this helps!

4 0

2 years ago

Every year, new records in track and field events are recorded. Let's take an historic look back at some exciting races.

Hitman42 [59]

First we need to turn Aouita's time for the race into seconds. There are 60 seconds in a minute, so 7 minutes and 29.45 seconds is (7 x 60) + 29.45 = 449.45. He ran 3000 meters in that time, so his average speed was 3000 meters divided by 449.45 seconds. 3000 / 449.45 = 6.67 m/s. So, on average, he covered 6.67 meters (more than 21 feet!) during each second of the race.

4 0

3 years ago

A physics student spins a bucket of water over her head in a circular path in order to demonstrate centripetal force. She fills

Ronch [10]

Answer:

The first case requires more force to spin de bucket.

Explanation:

As we know, the centripetal force is directly proportional to the mass, the equation is given by:

$F_{c}=ma_{c}$

The first case has a quarter more water than the second case, therefore the first case requires more force to spin de bucket.

I hope it helps you!

3 0

3 years ago