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zzz [600]
3 years ago
14

While in empty space, an astronaut throws a ball at a velocity of 9 m/s. What will the velocity of the ball be after it has trav

eled 6 meters?
Physics
1 answer:
Snezhnost [94]3 years ago
5 0

Answer:

1.5

Explanation:

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Lindsey started biking to the park traveling 15 mph, after some time the bike got a flat so Lindsey walked the rest of the way,
-BARSIC- [3]

Answer:

Lindsey biked 45 miles for 3 hours at 15 mph and walked 8 miles for 2 hours at 4 mph.

Explanation:

Speed = distance/time

Let the distance that Lindsey biked through be x miles and the time it took her to bike through that distance be t hours

Then, the rest of the distance that she walked is (53 - x) miles

And the time she spent walking that distance = (5 - t) hours

Her biking speed = 15 mph = 15 miles/hour

Speed = distance/time

15 = x/t

x = 15 t (eqn 1)

Her walking speed = 4 mph = 4 miles/hour

4 = (53 - x)/(5 - t)

53 - x = 4 (5 - t)

53 - x = 20 - 4t (eqn 2)

Substitute for X in (eqn 2)

53 - 15t = 20 - 4t

15t - 4t = 53 - 20

11t = 33

t = 3 hours

x = 15t = 15 × 3 = 45 miles.

(53 - x) = 53 - 45 = 8 miles

(5 - t) = 5 - 3 = 2 hours

So, it becomes evident that Lindsey biked 45 miles for 3 hours at 15 mph and walked 8 miles for 2 hours at 4 mph.

5 0
3 years ago
If Zack has a mass of 80 kg calculate his weight on Earth. Please show work, thank you!
Alina [70]
784 Newton ( mass x gravity = 80 x 9.8)
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3 years ago
Which of the following classifications of star temperature is coolest?
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The hottest would be the O type and the coolest is M
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How long should you hold a stretch?<br> 10-30 seconds<br> 90 seconds<br> 5 minutes
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I think you should hold a stretch for 10-30 seconds

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B. What information did Wegener not have that would have strengthened his argument? (3
VMariaS [17]
<h2>Movement of Continents</h2>

Explanation:

  • Alfred Wegener was a German astronomer who proposed the "continental drift" hypothesis in 1910.
  • Alfred Wegener was not able to explain the movements of the continent in how and in which way they are moved.
  • He failed in an attempt to explain with the use of tides made the theory undefinable fully.
  • Also, the major problem with Wegener's theory of Continental Drift was that there was no proper explanation of a mechanism.
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3 years ago
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