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vodomira [7]
4 years ago
11

Suppose we repeat the experiment from the video, but this time we use a rocket three times as massive as the one in the video, a

nd in place of water we use a fluid that is twice as massive (dense) as water. If the new fluid leaves the rocket at the same speed as the water in the video, what will be the ratio of the horizontal speed of our rocket to the horizontal speed of the rocket in the video after all the fluid has left the rocket?
Physics
1 answer:
aliina [53]4 years ago
8 0

Answer:

2/3

Explanation:

It is important to bear in mind that momentum is generated by the fluid. Momentum is proportional to the mass and velocity, therefore increasing the mass(density) of the liquid by a factor of 2, while the velocity is constant, increases the momentum of fluid (and rocket) by 2. For any closed system, the momentum is conserved. With that in mind, the momentum of the fluid is equal to but opposite in direction to the momentum of the rocket. Velocity of the rocket given by v=p/m (Where p=momentum of the rocket initially and m is its initial mass). The mass of the rocket increases 3 times. So....

Initially:

vi=p/m

Now:

vf=2p/3m

<h3>The ratio is given by:</h3>

vf:vi = 2p/3m:p/m

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ale4655 [162]

Answer: This is because water has a higher Specific Heat Capacity than air.

Explanation:

The specific heat capacity of an object measures how much heat will be required to change its temperature.

Water has a higher specific heat capacity than air, so the temperature of the water will remain fairly constant even though the air surrounding the water is experience temperature changes.

Since air has a lower Specific Heat Capacity than water, heat from the sun will readily heat it up in comparison to water.

6 0
4 years ago
Round your decimal answer to the nearest hundredth.
trasher [3.6K]

Son of c is .72

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3 0
3 years ago
A car is traveling at 20 m/s and a dog runs out in front
Pani-rosa [81]

Answer:

Below

Explanation:

To find the acceleration of the car you can use this formula and rearrange :

     vf = vi + at

We know that our time is 2 seconds, our initial velocity, vi, is 20 m/s, and our final velocity vf is 0 because the car comes to a stop before hitting the dog.

So we can just go ahead and plug in these values into the equation above :

     0m/s = 20m/s + (a)(2s)

     -20m/s = 2s(a)

Divide both sides by 2

     -10m/s^2 = a

Therefore the acceleration of the car is -10m/s^2 [forward]

     You could also write this as 10m/s^2 [back]

Hope this helps! Best of luck <3

8 0
3 years ago
Write an argument of any one
vampirchik [111]
<h3>I do think parallel universes exist. There are now some scientific theories that support the idea of parallel universes beyond our own. However, the multiverse theory remains one of the most controversial theories in science.Our universe is unimaginably big. Hundreds of billions, if not trillions, of galaxies(opens in new tab) spin through space, each containing billions or trillions of stars(opens in new tab). Some researchers studying models of the universe speculate that the universe's diameter could be 7 billion light-years(opens in new tab) across. Others think it could be infinite.

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4 0
2 years ago
A plane is traveling at a velocity of 90 m/s. It accelerates at a constant rate of 1.5 m/s​2 until its velocity reaches 500 m/s.
katrin2010 [14]

Answer:

The distance the plane covered while it was accelerating is 80,633.3 m

Explanation:

Given;

initial velocity of the plane, u = 90 m/s

acceleration of the plane, a = 1.5 m/s²

final velocity of the plane, v = 500 m/s

The distance covered by the plane is given as;

v² = u² + 2ad

where;

d is the distance covered by the plane;

500² = 90² + 2(1.5)d

500²  - 90² = 3d

241900 = 3d

d = 241900 / 3

d = 80,633.3 m

Therefore, the distance the plane covered while it was accelerating is 80,633.3 m

5 0
3 years ago
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