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Kaylis [27]
3 years ago
10

1. Which of the following is not an acceptable Physical Education activity?

Physics
2 answers:
AlexFokin [52]3 years ago
6 0
A. Vacuuming


not a lot of physical movement is required
Dmitrij [34]3 years ago
3 0
The answer is A

Explanation:
Vacuuming doesn’t involve a lot of physical movements.
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If the v – t graph of a particle is parallel to the t – axis the body has (a) uniform velocity (b) uniform acceleration (c) zero
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Answer:

zero  velocity

Explanation:

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An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 65 N when the cab is stand
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Answer:

(A) Reading will be 65 N

(B) Net force on the elevator will be 49.076 N    

Explanation:

We have given the balance force = 65 N

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(a) In first case as the as the speed is constant so the force on the elevator will be 65 N

(B) In second case as the elevator is decelerating at a rate of 2.4m/sec^2

So net acceleration = 9.8-2.4=7.4m/sec^2

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3 years ago
What are two ways electromagnetic waves are used in a home computer scanner?
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Answer:

A and B

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2 years ago
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Answer:

D. Exothermic, because energy is being absorbed from the surroundings

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This is true about the Exothemic reaction due to the fact that, the reaction occurs outside the body. During this reaction, the energy being absorbed <em>from the surrounding environment will hit the body surface thereby creating the coldness due to the heat given out from the body  being minimal.</em>

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