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Tju [1.3M]
2 years ago
9

Which of the following is equivalent to 4/20? 1. 1/10 2. 3/15 3. 3/19 4. 2/12

Mathematics
2 answers:
Butoxors [25]2 years ago
8 0
I would suggest trying 3/15 but I could be wrong
Artemon [7]2 years ago
8 0

Answer:

3/15=1/5

Step-by-step explanation:

4/20=3/15

3/15 is not all the way simplified. So i'm going to make it simple.

3 divided by 3=1

15 divided by 3=5

1/5 x 4=4/20

4/20 divided by 1/5=4

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The new Kinetic energy is 8000 J

Step-by-step explanation:

Step 1 :

Given,

The Kinetic energy of the fan = 2000J

We need to find  new kinetic energy when the angular velocity is doubled.

Step 2 :

We have

KE = \frac{1}{2 } × m × v² = 2000

where m represents the mass and  v represents the singular velocity

v = r ω where

r is radius of  fan and ω is the angular velocity.

Given that the angular velocity is doubled  singular velocity is also doubled. since the radius of the fan is the same in both cases we have

the new velocity = 2rω = 2v

So the KE = \frac{1}{2} m(new velocity)² = \frac{1}{2} m(2v)² = 4 (\frac{1}{2} mv²) = 4 (2000) = 8000 J

Step 3 :

Answer :

The new Kinetic energy is 8000 J

4 0
3 years ago
► 00:00
Viefleur [7K]

Answer:

Proof

Step-by-step explanation:

PROOF can be said to be logical mathematical argument in which every statement of fact is supported by a reason

due to the fact mathematical proof is an inferential argument for a mathematical statement because it help to shows that the assumptions stated logically guarantee and enables the conclusion.

Therefore Proofs can be said to be an examples of exhaustive deductive reasoning because they tend to often establish logical certainty which can be differentiated from empirical arguments which inturn help to establish reasonable and effectively expectation as well as employ logic expressed in mathematical symbols which is why proofs are often written in terms of rigorous informal logic

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