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Liono4ka [1.6K]
3 years ago
9

NEED HELP Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is 72 kg. If the skaters push aw

ay from each other without spinning,Single choice.
(2 Points)

the lighter skater has less momentum.

the heavier skater has less momentum

their total momentum decreases.

their momenta are equal but opposite.
Physics
2 answers:
Masja [62]3 years ago
4 0

Answer:

Two skaters stand facing each other. One skater's mass is 60 kg, and the other's mass is 72 kg. If the skaters push away from each other without spinning. Their momentums are equal but opposite.

Explanation:

Answer option D) Their momentums are equal but opposite.

stealth61 [152]3 years ago
3 0

Answer:

the heavier skater has less momentum

hope it is helpful to you

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A bat emitts a sonar sound wave (343 m/s) that bounces off a mosquito 8.42 m away
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The time lapse between when the bat emits the sound and when it hears the echo is 0.05 s.

From the question given above, the following data were obtained:

Velocity of sound (v) = 343 m/s

Distance (x) = 8.42 m

Time (t) =?

We can obtain obtained the time as illustrated below:

v = 2x / t

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343 = 16.84 / t

Cross multiply

343 ×  t = 16.84

Divide both side by 343

t = 16.84/343

t = 0.05 s

Thus, the time between  when the bat emits the sound and when it hears the echo is 0.05 s.

<h3>How does a bat know how far away something is?</h3>

A bat emits a sound wave and carefully listens to the echoes that return to it. The returning information is processed by the bat's brain in the same way that we processed our shouting sound with a stopwatch and calculator. The bat's brain determines the distance of an object by measuring how long it takes for a noise to return.

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Correction question:

A bat emits a sonar sound wave (343 m/s) that bounces off a mosquito 8.42 m away. How much time elapses between when the bat emits the sound and when it hears the echo? (Unit = s)

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