Can somebody help me please? 10 point!

Physics

1 answer:

Vlada [557]3 years ago

7 0

The correct answer is the last one:
A and C are different elements, while D is an isotope of C.

In fact, A and C are different elements, because they have a different number of protons in the nucleus (A has 3 protons, while C has 4 protons). Instead, D and C are the same element (they both have 4 protons in the nucleus), but they are different isotopes since they have a different number of neutrons (D has 4 neutrons while C has 3 neutrons)

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Can someone help me?

Leviafan [203]

Car X traveled 3d distance in t time. Car Y traveled 2d distance in t time. Therefore, the speed of car X, is 3d/t, the speed of car Y, is 2d/t. Since speed is the distance taken in a given time.

In figure-2, they are at the same place, we are asked to find car Y's position when car X is at line-A. We can calculate the time car X needs to travel to there. Let's say that car X reaches line-A in t' time.

$V_x .t' = 3d\\ \frac{3d}{t} .t' = 3d\\ t'=t$

Okay, it takes t time for car X to reach line-A. Let's see how far does car Y goes.

$V_y.t = \frac{2d}{t} .t = 2d$

We found that car Y travels 2d distance. So, when car X reaches line-A, car Y is just a d distance behind car X.

4 0

3 years ago

What is the speed of a wave that has a frequency of 125 Hz and a wavelength of 1.25 meters? Express your answer to the nearest w

shtirl [24]

156 is the answer. so 156.25 is almost the same thing, you just round. It's not hard. Thank you!!!

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3 years ago

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Believing that Nick will not be a good waiter because he is 60 years old is an example of O Stereotype O Prejudice Situational a

Helen [10]

Ya so quid fuh doil em yous

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3 years ago

A cat is dropped out of a window and falls to the ground in 12 seconds. It lands on its feet.

zloy xaker [14]

Answer:

The impact was gravity

Explanation:

LOOK IT UP SIS

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2 years ago

An object traveling in a straight line accelerates. What will definitely happen due to the acceleration?

Damm [24]

"Acceleration" means any change in the speed or direction of motion ... speeding up, slowing down, or turning. So . . .

<span>-- </span><span>The distance traveled in a certain time may increase or decrease.

-- The displacement covered in a certain time may increase or decrease.

-- The speed of the object may increase or decrease.

-- The velocity of the object (speed/direction) will change.
</span>
Hope this helps..

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3 years ago

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