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Marina CMI [18]
3 years ago
15

Pluto has been reassigned and is now a dwarf planet. Why did scientists think this reassignment was necessary? If you were a sci

entist at that time, would you be for or against the reassignment of Pluto? What evidence would you give to defend your choice?
Physics
2 answers:
nadya68 [22]3 years ago
7 0
I would not because Pluto is like the other planets even though that it is smaller that all the other planets and colder but I don’t think it was necessary
kap26 [50]3 years ago
6 0

Answer:

Explanation:

we humans have our own ify classification for celestial objects, most people are saddened that pluto is not a planet anymore altho it hasn't changed at all.

scientist say that if an object is going to be considered a planet it must fill in these three checkboxes:

You must be spherical, you must orbit a star, and you must have already cleared your path or debris.

Pluto fills in the first two boxes but it does orbit in the keyperbelt and there are 5 other objects just like it. this is why pluto has been dubbed a dwarf planet.

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List some limiting factors that might limit the size of a population within its environment
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1. Over-hunting
2. A disappearance of a primary food source
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7 0
3 years ago
The speed of a projectile when it reaches its maximum height is 0.58 times its speed when it is at half its maximum height. What
Ne4ueva [31]

Speed of the projectile at its maximum height is only along horizontal direction

so at highest point

v_1 = v_x

now when he is at half of the maximum height the speed will be in x and y direction both

v_2 = \sqrt{v_y^2 + v_x^2}

here it is given that

v_1 = 0.58 v_2

v_x = 0.58\sqrt{v_x^2 + v_y^2}

2.97 v_x^2 = v_x^2 + v_y^2

1.97 v_x^2 = v_y^2

also we know that

v_y^2 = v_{iy}^2 - 2 g \frac{H}{2}

here we know that maximum height is given as

H = \frac{v_{iy}^2}{2g}

v_y^2 = v_{iy}^2 - 2 g\frac{v_{iy}^2}{4g}

v_y^2 = \frac{v_{iy}^2}{2}

now from above

1.97 v_x^2 = \frac{v_{iy}^2}{2}

1.98 v_x = v_{iy}

also we know that angle of projection is

tan\theta = \frac{v_{iy}}{v_x}

tan\theta = \frac{1.98v_x}{v_x}

so angle is

\theta = tan^{-1} 1.98

\theta = 63.3 degree

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3 years ago
A skateboader is accelerating forward how would his acceleration change if he had more mass
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Answer: If the force stays the same, the acceleration would decrease
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If a marathon runner averages 9.50 mi/h, how many minutes does it take him or her to run a 26.22-mi marathon?
horsena [70]

Answer: 196 minutes

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2 hours and 76 minutes equals 196 minutes

4 0
3 years ago
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77julia77 [94]

Answer:

What is the best description for the volume of air volume of air provided in a high quality rescue breath?

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D) clear and obvious rise of the chest, sustained over a few seconds

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3 years ago
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