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adelina 88 [10]
3 years ago
10

2 / 3

Physics
1 answer:
kiruha [24]3 years ago
3 0

Answer:

Explanation:

   

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Sound wave cannot propagate through vacuum.Why?<br>Plz give reason in short....​
Olenka [21]

Answer:

Explanation:

If a perfect vacuum existed in any volume, then no sound would be able to propagate through it, because a sound wave is a pressure wave, and there would be identically zero pressure. Of course, we could get into speculations about “dark energy” or “vacuum energy” supporting pressure waves, but let’s not go there.

4 0
3 years ago
A man paddles a canoe in a long, straight section of a river. The canoe moves downstream with constant speed 5 m/s relative to t
nikklg [1K]

Answer:

Explanation:

We shall consider all movement with respect to water assuming that river is at rest or motionless .

speed of canoe = 5 m /s

in five minutes , distance between hat and canoe = 5 x 60 x 5

1500 m

This distance will be covered by man in return journey . In this case his speed is 5 m /s again considering river constant .

So this will be covered at 5 m /s

time taken = 1500 / 5 = 300 s

= 5 minutes .

so it will take 5 minutes to row back to reclaim his hat .

7 0
3 years ago
Someone please help on this? I just need the diagram to be drawn.
gregori [183]

Well the diagram would look like the water cycle I think


7 0
3 years ago
1 2 3 4 5 6 7 8 9 10 TIME REMAINING 02:58:47 Lucy is supposed to write down the lengths of 10 earthworms found near the playgrou
Hitman42 [59]
The data are recorded incorrectly. All of Lucy's data is correct, she just needs to convert her measurements from centimeters to millimeters. 
3 0
3 years ago
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A student runs 100 meters in 11 seconds. What is the speed of the student?
GarryVolchara [31]
Speed = distance / time

speed = 100 / 11

speed = 9.09m/s

to get rid of meters and get miles you want to multiply by 1 mile then divide by 1609 meters. to get hours, you times the amount of seconds in an hour (3600) and divide by 1 hour

9.09m/s × 1mile / 1609m × 3600s / 1 hour = 20.3 miles / hour
5 0
3 years ago
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