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Alexandra [31]
2 years ago
10

In scientific notation, (6.2 x 10^4) x (3.3 x 10^2 ) equals ____________________.

Physics
2 answers:
gregori [183]2 years ago
8 0

For this case we have the following multiplication:

(6.2 * 10 ^ 4) * (3.3 * 10 ^ 2)

For associative property, we can rewrite the expression as:

(6.2 * 3.3) * (10 ^ 4 * 10 ^ 2)

Then, by properties of exponents we have:

In the multiplication, if we have the same base, the exponents are added.

Therefore, by rewriting the expression we have:

(6.2 * 3.3) * (10 ^{4 + 2})

Finally:

(20.46) * (10 ^ 6)

Then, we rewrite the result correctly in scientific notation.

To do this, we move the point one space to the left and increase the degree of the exponent one unit:

2.046 * 10 ^ 7

Answer:

In scientific notation, (6.2 * 10 ^ 4) * (3.3 * 10 ^ 2) equals2.046 * 10 ^ 7

castortr0y [4]2 years ago
5 0
You will get 20460000 as your answer which is broken down into, 2.046 x 10^7 as your number has to be between 1-10.
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Refer to the diagram shown below.

Vector a is 2.8 cm long and 60° above the x-axis in the first quadrant. Therefore it s represented by
\vec{a} = 2.8 (cos60^{o} \vec{i}+sin60^{o}\vec{j})

Vector b is 1.9 cm long and 60° below the x-axis in the fourth quadrant. Therefore it is represented by 
\vec{b}=1.9(cos60^{o}\vec{i}-sin60^{o}\vec{j})

The vectors may be written as
a = 2.8*(cos60°, sin60°) = (1.445, 2.5028)
b = 1.9*(cos60°, -sin60°) = (0.950, -1.6454)

Part (a)
a + b = (1.445+0.950, 2.5028-1.6454)
         = (2.395, 0.8574)
The magnitude of this vector is
√[2.395² + 0.8574² ] = 2.5438 cm
Its direction is
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The resultant vector is shown in the figure below.

Part (b)
Similarly obtain
a - b = (0.495, 4.1485)
The magnitude is 4.1777.
The direction is 83° above the x-axis, in the 1st quadrant.
The resultant vector is shown in the figure below.

Part (c)
Similarly, obtain
b - a = (-0.495, -4.1483)
The magnitude is 4.1777.
The direction is 83° below the negative x-axis, in the 3rd quadrant.
The resultant vector is shown in the figure below.

5 0
3 years ago
Define efficiency. class -8 ​
Finger [1]

the state or quality of being efficient.

"greater energy efficiency"

Answer

Efficiency is the ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result.

8 0
2 years ago
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Answer:

Impulse = 0.9408Ns

Explanation:

Impulse is the product of force and time

Impulse = Ft

Given

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F = 117.6N

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Get the impulse

Impulse = 117.6*0.008

Impulse = 0.9408Ns

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Explanation:

the correct answer is C.

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