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hoa [83]
4 years ago
15

Which of the following statements about planetary satellites is true? all planetary satellites are as large as our moon or bigge

r. all planetary satellites are relatively small, typically having a radius of no more than 20 kilometers. planetary satellites vary greatly in size, but none are larger than any of the planets in the solar system. planetary satellites vary greatly in size, from very small, to some that are larger than some planets.
Physics
2 answers:
Illusion [34]4 years ago
6 0
<span> planetary satellites vary greatly in size, from very small, to some that are larger than some planets.</span>
Anvisha [2.4K]4 years ago
3 0

Answer:

Planetary satellites vary greatly in size, from very small, to some that are larger than some planets.

Explanation:

Natural sateletes are celestial bodies that orbit other larger celestial bodies. The solar system has several satellites, the best known being the moon, the natural satellite of planet Earth. The planets of the solar system have different sizes, just like the natural satellites. Thus, there are satellites larger than planets. The moon itself is a larger satellite than some planets, like Mercury.

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A roller coaster starts from rest at point A. What is its speed at point C if the track is frictionless.
OleMash [197]
At A, coaster is only associated with potential energy.
At B, coaster is associated with kinetic as well as potential energy.
Since the track is frictionless, no energy will be lost when coaster reaches from point A to point B. Therefore, according to conservation of energy, total energy at A should be equal to total energy at B.
Total energy at A = mgh = mg(12) 
Total energy at B = mgh+ mv²/2 = mg(2) + mv²/2
∴12mg = 2mg + mv²/2
∴(12g-2g)×2 = v²
∴v² = 20g
∴v = 14m/s.

Again conserving energy at points B and C.
Total energy at B = 2mg + m(14)²/2 
Total energy at C = 4mg + mv²/2
∴2mg + m(14²)/2 = 4mg + mv²/2
Solving this you get,
v = 12.52 m/s.
Therefore, speed of roller coaster at point C is 12.52 m/s.
8 0
4 years ago
This cardiovascular event may occur when a blood vessel in the brain bursts or becomes blocked by something, such as a traveling
bagirrra123 [75]
A, stroke. I know this would happen only from watching too much House (lol) but I know for fact that a heart attack would be caused by a blood clot if it gets stuck in an actual heart vessel.
7 0
3 years ago
Read 2 more answers
The graph shows that the molecules in a liquid do not all have the same speed
amm1812
1. I don't see a graph 
2. It could be because a liquid could be evaporating in the process
3. It could be that the liquid is getting colder
4. 1 liquid is medium and moving a the normal pace
8 0
4 years ago
A car is traveling at a speed of 37 m/s.
Vika [28.1K]

1. The speed in kilometers per hour (Km/h) is 133.2 Km/h

2. Yes, the speed is exceeding the 125 Km/h limit

<h3>How to convert 37 m/s to Km/h</h3>

From the question given above, the following data were obtained:

  • Speed (in m/s) = 37 m/s
  • Speed (in Km/h) =?

We can convert 37 m/s to kilometers per hour (Km/h) by doing the following:

1 m/s = 3.6 Km/h

Therefore,

37 m/s = 37 × 3.6

37 m/s = 133.2 Km/h

Thus, 37 m/s is equivalent to 133.2 Km/h

<h3>2. How to determine if the speed is exceeding the limit</h3>
  • Speed of car = 133.2 Km/h
  • Speed limit = 125 Km/h

From the above, we can see that the speed of the car is greater than the speed limit.

Thus, we can conclude that the speed of the car is exceeding the speed limit.

Learn more about conversion:

brainly.com/question/10893215

#SPJ1

3 0
2 years ago
A car travels with a constant velocity of 45km/hr for 20 sec. What distance does it cover
Flauer [41]

Explanation:

This is simple.

Convert the speed of 45km/h to metres per second (m/s):

45 * 1000m = 45000m per hour.

1 hour = 60 seconds * 60 minutes = 3600 seconds.

45000m/h / 3600 = 12.5m/s

(A quicker way is just to divide by 3.6)

So in 20 seconds it would cover:

12.5m/s * 20s = 250m.

A car travelling at 45km/h would travel 250 metres in 20s.

6 0
2 years ago
Read 2 more answers
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