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sasho [114]
3 years ago
5

If a hockey player starts from rest and accelerates at a rate of 2.1 m/s², how long does it take him to skate 30 m?

Physics
1 answer:
Vlada [557]3 years ago
5 0

Answer:

its A i think im not sure tho

Explanation:

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Which object is probably composed of ice and dust?
Setler [38]

I think comets because they are small and they are composed of ice or water. Hope it helps :)

7 0
3 years ago
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Create the following matrix H:
sladkih [1.3K]

Answer:

a) {[1.25  1.5  1.75  2.5  2.75]

    [35  30  25  20  15]  }

b) {[1.5  2  40]

    [1.75  3  35]

    [2.25  2  25]

    [2.75  4  15]}

Explanation:

Matrix H: {[1.25  1.5  1.75  2  2.25  2.5  2.75]

                [1  2  3  1  2  3  4]

                [45  40  35  30  25  20  15]}

Its always important to get the dimensions of your matrix right. "Roman Columns" is the mental heuristic I use since a matrix is defined by its rows first and then its column such that a 2 X 5 matrix has 2 rows and 5 columns.

Next, it helps in the beginning to think of a matrix as a grid, labeling your rows  with letters (A, B, C, ...) and your columns with numbers (1, 2, 3, ...).

For question a, we just want to take the elements A1, A2, A3, A6 and A7 from matrix H and make that the first row of matrix G. And then we will take the elements B3, B4, B5, B6 and B7 from matrix H as our second row in matrix G.

For question b, we will be taking columns from matrix H and making them rows in our matrix K. The second column of H looks like this:

{[1.5]

[2]

[40]}

Transposing this column will make our first row of K look like this:

{[1.5  2  40]}

Repeating for columns 3, 5 and 7 will give us the final matrix K as seen above.

4 0
3 years ago
What will be the velocity of body in horizontal motion of the body in the air?
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Answer: Projectiles travel with a parabolic trajectory due to the influence of gravity. There are no horizontal forces acting upon projectiles and thus no horizontal acceleration, The horizontal velocity of a projectile is constant (a never changing in value.

Explanation: I hoped that helped yall !!

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The plant below is purebred for height tall. Write the alleles of this plant. In any cross for height, what kind of Offspring wi
lisov135 [29]

Answer:

This should be tagged for biology not physics.

Explanation:

:)

5 0
3 years ago
Help Me! I’ll give you brain list btw just the first three rows if you want :’)
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Answ

Explanation:

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primarily the co2 content present in the air will diminish to provide chances for the efficiency of the human being

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