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exis [7]
3 years ago
5

Explain why Pluto has been re-categorized as a dwarf planet.

Physics
1 answer:
chubhunter [2.5K]3 years ago
7 0

Explanation:

According to International Astronomical union a planet must satisfy the following three conditions-

1. It should orbit around sun(parent star).

2. It should have enough gravity to maintain almost spherical shape.

3. It should have cleared its neighbourhood around its orbit.

Pluto does not fulfill the third criteria and hence it has been re-categorized as dwarf planet.

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A ball whose mass is 0.3 kg hits the floor with a speed of 5 m/s and rebounds upward with a speed of 2 m/s. If the ball was in c
Sonbull [250]

Answer:

1400 N

Explanation:

Change in momentum equals impulse which is a product of force and time

Change in momentum is given by m(v-u)

Equating this to impulse formula then

m(v-u)=Ft

Making F the subject of the formula then

F=\frac {m(v-u)}{t}

Take upward direction as positive then downwards is negative

Substituting m with 0.3 kg, v with 2 m/s, and u with -5 m/s and t with 0.0015 s then

F=\frac {0.3(2--5)}{0.0015}=1400N

4 0
3 years ago
When a wire loop is connected to a battery, what is produced in the loop?
Vinil7 [7]

Answer:

magnetic field

Explanation:

3 0
3 years ago
Which of the following best describes how galaxies exist in the universe?
anzhelika [568]
I think the correct answer from the choices listed above is option D. Galaxies exist in the universe as they  form clusters that are light-years away from other clusters. Other choices are really far away from the truth. Hope this answers the question. Have a nice day.
4 0
3 years ago
Read 2 more answers
What power of an engine is required to pump 2450N of water per second from a well 50m deep to the surface
Arisa [49]
The correct one is A
4 0
3 years ago
A water bottle is dropped from a plane and accelerates because of gravity. What distance did it fall during 3 seconds?
exis [7]
It’d fall 29.4m or 96.46ft

Explanation:
Uhh since gravity is 9.8m/s then in three seconds it’d drop 29.4m or 96.46ft
That is assuming there isn’t a lot of wind resistance, but if you take that into account, then it’d probably be somewhere around 25m since the water bottle is going to be heavier than the wind resistance, and since we don’t know the weight of the water bottle it can’t really be calculated.

Hope this helps!
4 0
2 years ago
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