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Zarrin [17]
3 years ago
11

Electromagnetic waves are ____________ (one thousand/one million) times faster than sound.

Physics
2 answers:
spayn [35]3 years ago
5 0

Electromagnetic waves in air are 874,000 times as fast as sound waves.

I guess that's closer to <em>one million</em> than it is to one thousand.

vesna_86 [32]3 years ago
3 0

Answer:

one million

Explanation:

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An ice hockey puck slides along the ice at 12 m/s.?
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Since we know that..

I = F . ∆t
= m . a . ∆t ( the puck accelerating after the collision with the hockey sticks)
= m . ∆v/∆t . ∆t
= m . ∆v

Solve for m, we get..

m = I / ∆v
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6 0
3 years ago
When a moving car is brought to a stop with the brakes, its acceleration vector is 29. (a) in the same direction as its velocity
professor190 [17]

To develop this problem we will apply the concepts related to the kinematic equations of motion, specifically that of acceleration. Acceleration can be defined as the change of speed in an instant of time, mathematically this is

\vec{a} = \frac{\vec{v_2}-\vec{v_1}}{\Delta t}

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Therefore the correct answer is B.

7 0
3 years ago
2 ways in which the effects of friction can be minimised in the experiment​
Vlad [161]

Answer:

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Explanation:

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7 0
2 years ago
A train starts from rest and travels for 5.0 s with a uniform acceleration of 1.5 m/s2. What is the final velocity of the train?
alexandr1967 [171]

Answer:

Final speed of the train is 7.5 m/s

Explanation:

It is given that,

Uniform acceleration of the train is, a = 1.5 m/s²

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v=u+at

Here, train starts from rest so, u = 0

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7 0
3 years ago
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Answer:

B

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3 years ago
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